nginx-site: xml/en/docs/http/ngx_http_upstream

annotate xml/en/docs/http/ngx_http_upstream_module.xml @ 1418:23b409d1f5c7

Revised usage of "individual server" in upstream_conf.

author	Yaroslav Zhuravlev <yar@nginx.com>
date	Mon, 16 Feb 2015 11:59:43 +0300
parents	f5dcc23b214f
children	b3d7cd8d7c06

rev	line source
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1 <?xml version="1.0"?>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	2
580 be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 566 diff changeset	3 <!--
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 566 diff changeset	4 Copyright (C) Igor Sysoev
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 566 diff changeset	5 Copyright (C) Nginx, Inc.
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 566 diff changeset	6 -->
be54c443235a Added copyright markers to documentation sources. Ruslan Ermilov <ru@nginx.com> parents: 566 diff changeset	7
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	9
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	10 <module name="Module ngx_http_upstream_module"
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	11 link="/en/docs/http/ngx_http_upstream_module.html"
589 764fbac1b8b4 Added document revision. Ruslan Ermilov <ru@nginx.com> parents: 580 diff changeset	12 lang="en"
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	13 rev="35">
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	14
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	15 <section id="summary">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	16
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	17 <para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	18 The <literal>ngx_http_upstream_module</literal> module
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	19 is used to define groups of servers that can be referenced
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	20 by the <link doc="ngx_http_proxy_module.xml" id="proxy_pass"/>,
1181 b8f0362f61e5 Added links to scgi. Yaroslav Zhuravlev <yar@nginx.com> parents: 1155 diff changeset	21 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass"/>,
1194 9264fdb6c833 Added links to uwsgi. Ruslan Ermilov <ru@nginx.com> parents: 1186 diff changeset	22 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_pass"/>,
1181 b8f0362f61e5 Added links to scgi. Yaroslav Zhuravlev <yar@nginx.com> parents: 1155 diff changeset	23 <link doc="ngx_http_scgi_module.xml" id="scgi_pass"/>, and
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	24 <link doc="ngx_http_memcached_module.xml" id="memcached_pass"/> directives.
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	25 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	26
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	27 </section>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	28
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	29
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	30 <section id="example" name="Example Configuration">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	31
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	32 <para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	33 <example>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	34 upstream <emphasis>backend</emphasis> {
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	35 server backend1.example.com weight=5;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	36 server backend2.example.com:8080;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	37 server unix:/tmp/backend3;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	38
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	39 server backup1.example.com:8080 backup;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	40 server backup2.example.com:8080 backup;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	41 }
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	42
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	43 server {
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	44 location / {
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	45 proxy_pass http://<emphasis>backend</emphasis>;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	46 }
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	47 }
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	48 </example>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	49 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	50
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	51 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	52 Dynamically configurable group,
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	53 available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	54 <commercial_version>commercial subscription</commercial_version>:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	55 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	56 upstream <emphasis>dynamic</emphasis> {
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	57 zone upstream_dynamic 64k;
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	58
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	59 server backend1.example.com weight=5;
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	60 server backend2.example.com:8080 fail_timeout=5s slow_start=30s;
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	61 server 192.0.2.1 max_fails=3;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	62
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	63 server backup1.example.com:8080 backup;
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	64 server backup2.example.com:8080 backup;
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	65 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	66
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	67 server {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	68 location / {
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	69 proxy_pass http://<emphasis>dynamic</emphasis>;
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	70 health_check;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	71 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	72
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	73 location /upstream_conf {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	74 upstream_conf;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	75 allow 127.0.0.1;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	76 deny all;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	77 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	78 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	79 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	80 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	81
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	82 </section>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	83
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	84
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	85 <section id="directives" name="Directives">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	86
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	87 <directive name="upstream">
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	88 <syntax block="yes"><value>name</value></syntax>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	89 <default/>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	90 <context>http</context>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	91
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	92 <para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	93 Defines a group of servers.
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	94 Servers can listen on different ports.
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	95 In addition, servers listening on TCP and UNIX-domain sockets
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	96 can be mixed.
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	97 </para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	98
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	99 <para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	100 Example:
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	101 <example>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	102 upstream backend {
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	103 server backend1.example.com weight=5;
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	104 server 127.0.0.1:8080 max_fails=3 fail_timeout=30s;
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	105 server unix:/tmp/backend3;
1126 2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	106
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	107 server backup1.example.com backup;
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	108 }
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	109 </example>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	110 </para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	111
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	112 <para>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	113 By default, requests are distributed between the servers using a
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	114 weighted round-robin balancing method.
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	115 In the above example, each 7 requests will be distributed as follows:
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	116 5 requests go to <literal>backend1.example.com</literal>
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	117 and one request to each of the second and third servers.
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	118 If an error occurs during communication with a server, the request will
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	119 be passed to the next server, and so on until all of the functioning
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	120 servers will be tried.
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	121 If a successful response could not be obtained from any of the servers,
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	122 the client will receive the result of the communication with the last server.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	123 </para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	124
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	125 </directive>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	126
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	127
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	128 <directive name="server">
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	129 <syntax><value>address</value> [<value>parameters</value>]</syntax>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	130 <default/>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	131 <context>upstream</context>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	132
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	133 <para>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	134 Defines the <value>address</value> and other <value>parameters</value>
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	135 of a server.
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	136 The address can be specified as a domain name or IP address,
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	137 with an optional port, or as a UNIX-domain socket path
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	138 specified after the “<literal>unix:</literal>” prefix.
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	139 If a port is not specified, the port 80 is used.
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	140 A domain name that resolves to several IP addresses defines
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	141 multiple servers at once.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	142 </para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	143
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	144 <para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	145 The following parameters can be defined:
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	146 <list type="tag">
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	147
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	148 <tag-name id="weight">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	149 <literal>weight</literal>=<value>number</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	150 </tag-name>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	151 <tag-desc>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	152 sets the weight of the server, by default, 1.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	153 </tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	154
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	155 <tag-name id="max_fails">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	156 <literal>max_fails</literal>=<value>number</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	157 </tag-name>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	158 <tag-desc>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	159 sets the number of unsuccessful attempts to communicate with the server
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	160 that should happen in the duration set by the <literal>fail_timeout</literal>
968 fa19bacf6e1e Unified upstream server up/down state terminology. Vladimir Homutov <vl@nginx.com> parents: 966 diff changeset	161 parameter to consider the server unavailable for a duration also set by the
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	162 <literal>fail_timeout</literal> parameter.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	163 By default, the number of unsuccessful attempts is set to 1.
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	164 The zero value disables the accounting of attempts.
942 ba3d6ade3513 Elaborate on upstream server failures. Ruslan Ermilov <ru@nginx.com> parents: 917 diff changeset	165 What is considered an unsuccessful attempt is defined by the
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	166 <link doc="ngx_http_proxy_module.xml" id="proxy_next_upstream"/>,
1181 b8f0362f61e5 Added links to scgi. Yaroslav Zhuravlev <yar@nginx.com> parents: 1155 diff changeset	167 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_next_upstream"/>,
1194 9264fdb6c833 Added links to uwsgi. Ruslan Ermilov <ru@nginx.com> parents: 1186 diff changeset	168 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_next_upstream"/>,
1181 b8f0362f61e5 Added links to scgi. Yaroslav Zhuravlev <yar@nginx.com> parents: 1155 diff changeset	169 <link doc="ngx_http_scgi_module.xml" id="scgi_next_upstream"/>, and
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	170 <link doc="ngx_http_memcached_module.xml" id="memcached_next_upstream"/>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	171 directives.
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	172 </tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	173
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	174 <tag-name id="fail_timeout">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	175 <literal>fail_timeout</literal>=<value>time</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	176 </tag-name>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	177 <tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	178 sets
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	179 <list type="bullet">
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	180
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	181 <listitem>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	182 the time during which the specified number of unsuccessful attempts to
968 fa19bacf6e1e Unified upstream server up/down state terminology. Vladimir Homutov <vl@nginx.com> parents: 966 diff changeset	183 communicate with the server should happen to consider the server unavailable;
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	184 </listitem>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	185
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	186 <listitem>
968 fa19bacf6e1e Unified upstream server up/down state terminology. Vladimir Homutov <vl@nginx.com> parents: 966 diff changeset	187 and the period of time the server will be considered unavailable.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	188 </listitem>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	189
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	190 </list>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	191 By default, the parameter is set to 10 seconds.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	192 </tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	193
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	194 <tag-name id="backup">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	195 <literal>backup</literal>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	196 </tag-name>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	197 <tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	198 marks the server as a backup server.
968 fa19bacf6e1e Unified upstream server up/down state terminology. Vladimir Homutov <vl@nginx.com> parents: 966 diff changeset	199 It will be passed requests when the primary servers are unavailable.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	200 </tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	201
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	202 <tag-name id="down">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	203 <literal>down</literal>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	204 </tag-name>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	205 <tag-desc>
1410 f5dcc23b214f Deleted info about hash and ip_hash from the down parameter. Yaroslav Zhuravlev <yar@nginx.com> parents: 1393 diff changeset	206 marks the server as permanently unavailable.
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	207 </tag-desc>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	208
1126 2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	209 </list>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	210 </para>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	211
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	212 <para>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	213 Additionally,
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	214 the following parameters are available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	215 <commercial_version>commercial subscription</commercial_version>:
1126 2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	216 <list type="tag">
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	217
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	218 <tag-name id="max_conns">
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	219 <literal>max_conns</literal>=<value>number</value>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	220 </tag-name>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	221 <tag-desc>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	222 limits the maximum <value>number</value> of simultaneous connections to the
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	223 proxied server (1.5.9).
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	224 Default value is zero, meaning there is no limit.
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	225 </tag-desc>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	226
1124 d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	227 <tag-name id="resolve">
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	228 <literal>resolve</literal>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	229 </tag-name>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	230 <tag-desc>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	231 monitors changes of the IP addresses
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	232 that correspond to a domain name of the server,
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	233 and automatically modifies the upstream configuration
1127 948c853f5d22 Upstream: improved "server resolve". Ruslan Ermilov <ru@nginx.com> parents: 1126 diff changeset	234 without the need of restarting nginx (1.5.12).
1124 d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	235 <para>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	236 In order for this parameter to work,
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	237 the <link doc="ngx_http_core_module.xml" id="resolver"/> directive
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	238 must be specified in the
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	239 <link doc="ngx_http_core_module.xml" id="http"/> block.
1127 948c853f5d22 Upstream: improved "server resolve". Ruslan Ermilov <ru@nginx.com> parents: 1126 diff changeset	240 Example:
1124 d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	241 <example>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	242 http {
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	243 resolver 10.0.0.1;
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	244
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	245 upstream u {
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	246 zone ...;
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	247 ...
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	248 server example.com resolve;
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	249 }
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	250 }
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	251 </example>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	252 </para>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	253 </tag-desc>
d790333947f4 Upstream: the "resolve" parameter of the "server" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1123 diff changeset	254
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	255 <tag-name id="route">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	256 <literal>route</literal>=<value>string</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	257 </tag-name>
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	258 <tag-desc>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	259 sets the server route name.
1126 2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	260 </tag-desc>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	261
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	262 <tag-name id="slow_start">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	263 <literal>slow_start</literal>=<value>time</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	264 </tag-name>
1126 2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	265 <tag-desc>
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	266 sets the <value>time</value> during which the server will recover its weight
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	267 from zero to a nominal value, when unhealthy server becomes
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	268 <link id="health_check">healthy</link>,
2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	269 or when the server becomes available after a period of time
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	270 it was considered <link id="fail_timeout">unavailable</link>.
1126 2e28d1c4a0a2 Upstream: revised layout of the "server" directive. Ruslan Ermilov <ru@nginx.com> parents: 1125 diff changeset	271 Default value is zero, i.e. slow start is disabled.
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	272 </tag-desc>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	273
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	274 </list>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	275 </para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	276
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	277 <para>
969 7c542520b8f7 Added note about behavior of a single server in an upstream. Vladimir Homutov <vl@nginx.com> parents: 968 diff changeset	278 <note>
7c542520b8f7 Added note about behavior of a single server in an upstream. Vladimir Homutov <vl@nginx.com> parents: 968 diff changeset	279 If there is only a single server in a group, <literal>max_fails</literal>,
7c542520b8f7 Added note about behavior of a single server in an upstream. Vladimir Homutov <vl@nginx.com> parents: 968 diff changeset	280 <literal>fail_timeout</literal> and <literal>slow_start</literal> parameters
7c542520b8f7 Added note about behavior of a single server in an upstream. Vladimir Homutov <vl@nginx.com> parents: 968 diff changeset	281 are ignored, and such a server will never be considered unavailable.
7c542520b8f7 Added note about behavior of a single server in an upstream. Vladimir Homutov <vl@nginx.com> parents: 968 diff changeset	282 </note>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	283 </para>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	284
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	285 </directive>
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	286
fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	287
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	288 <directive name="zone">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	289 <syntax><value>name</value> <value>size</value></syntax>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	290 <default/>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	291 <context>upstream</context>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	292
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	293 <para>
1123 9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	294 Defines the <value>name</value> and <value>size</value> of the shared
9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	295 memory zone that keeps the group’s configuration and run-time state that are
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	296 shared between worker processes.
1123 9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	297 Such groups allow changing the group membership
9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	298 or modifying the settings of a particular server
9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	299 without the need of restarting nginx.
9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	300 The configuration is accessible via a special location
9a9aa8e9d12c Rephrased the "zone" directive, translated into Russian. Yaroslav Zhuravlev <yar@nginx.com> parents: 1122 diff changeset	301 handled by <link id="upstream_conf"/>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	302 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	303
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	304 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	305 <note>
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	306 This directive is available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	307 <commercial_version>commercial subscription</commercial_version>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	308 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	309 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	310
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	311 </directive>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	312
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	313
1230 6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	314 <directive name="hash">
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	315 <syntax><value>key</value> [<literal>consistent</literal>]</syntax>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	316 <default/>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	317 <context>upstream</context>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	318 <appeared-in>1.7.2</appeared-in>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	319
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	320 <para>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	321 Specifies a load balancing method for a server group
1367 f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	322 where the client-server mapping is based on the hashed <value>key</value> value.
1230 6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	323 The <value>key</value> can contain text, variables, and their combinations.
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	324 Note that adding or removing a server from the group
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	325 may result in remapping most of the keys to different servers.
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	326 The method is compatible with the
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	327 <link url="http://search.cpan.org/perldoc?Cache%3A%3AMemcached">Cache::Memcached</link>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	328 Perl library.
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	329 </para>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	330
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	331 <para>
1367 f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	332 If the <literal>consistent</literal> parameter is specified
1230 6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	333 the <link url="http://www.last.fm/user/RJ/journal/2007/04/10/392555/">ketama</link>
1367 f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	334 consistent hashing method will be used instead.
1230 6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	335 The method ensures that only a few keys
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	336 will be remapped to different servers
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	337 when a server is added to or removed from the group.
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	338 This helps to achieve a higher cache hit ratio for caching servers.
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	339 The method is compatible with the
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	340 <link url="http://search.cpan.org/perldoc?Cache%3A%3AMemcached%3A%3AFast">Cache::Memcached::Fast</link>
1236 def99e640654 Fixed grammar. Sergey Kandaurov <pluknet@nginx.com> parents: 1233 diff changeset	341 Perl library with the <value>ketama_points</value> parameter set to 160.
1230 6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	342 </para>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	343
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	344 </directive>
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	345
6cc809881694 Upstream: added the "hash" directive. Yaroslav Zhuravlev <yar@nginx.com> parents: 1194 diff changeset	346
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	347 <directive name="ip_hash">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	348 <syntax/>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	349 <default/>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	350 <context>upstream</context>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	351
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	352 <para>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	353 Specifies that a group should use a load balancing method where requests
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	354 are distributed between servers based on client IP addresses.
542 a9e6a8613534 Documented IPv6 support in ip_hash. Ruslan Ermilov <ru@nginx.com> parents: 533 diff changeset	355 The first three octets of the client IPv4 address, or the entire IPv6 address,
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	356 are used as a hashing key.
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	357 The method ensures that requests from the same client will always be
968 fa19bacf6e1e Unified upstream server up/down state terminology. Vladimir Homutov <vl@nginx.com> parents: 966 diff changeset	358 passed to the same server except when this server is unavailable.
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	359 In the latter case client requests will be passed to another server.
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	360 Most probably, it will always be the same server as well.
542 a9e6a8613534 Documented IPv6 support in ip_hash. Ruslan Ermilov <ru@nginx.com> parents: 533 diff changeset	361 <note>
566 f8148fc88224 Documented 1.2.2 changes. Ruslan Ermilov <ru@nginx.com> parents: 542 diff changeset	362 IPv6 addresses are supported starting from versions 1.3.2 and 1.2.2.
542 a9e6a8613534 Documented IPv6 support in ip_hash. Ruslan Ermilov <ru@nginx.com> parents: 533 diff changeset	363 </note>
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	364 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	365
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	366 <para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	367 If one of the servers needs to be temporarily removed, it should
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	368 be marked with the <literal>down</literal> parameter in
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	369 order to preserve the current hashing of client IP addresses.
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	370 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	371
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	372 <para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	373 Example:
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	374 <example>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	375 upstream backend {
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	376 ip_hash;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	377
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	378 server backend1.example.com;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	379 server backend2.example.com;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	380 server backend3.example.com <emphasis>down</emphasis>;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	381 server backend4.example.com;
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	382 }
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	383 </example>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	384 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	385
526 4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	386 <para>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	387 <note>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	388 Until versions 1.3.1 and 1.2.2, it was not possible to specify a weight for
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	389 servers using the <literal>ip_hash</literal> load balancing method.
526 4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	390 </note>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	391 </para>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	392
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	393 </directive>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	394
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	395
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	396 <directive name="keepalive">
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	397 <syntax><value>connections</value></syntax>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	398 <default/>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	399 <context>upstream</context>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	400 <appeared-in>1.1.4</appeared-in>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	401
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	402 <para>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	403 Activates the cache for connections to upstream servers.
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	404 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	405
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	406 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	407 The <value>connections</value> parameter sets the maximum number of
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	408 idle keepalive connections to upstream servers that are preserved in
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	409 the cache of each worker process.
654 841118e33f41 Refined the text about cache of connections to upstream servers. Ruslan Ermilov <ru@nginx.com> parents: 589 diff changeset	410 When this number is exceeded, the least recently used connections
841118e33f41 Refined the text about cache of connections to upstream servers. Ruslan Ermilov <ru@nginx.com> parents: 589 diff changeset	411 are closed.
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	412 <note>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	413 It should be particularly noted that the <literal>keepalive</literal> directive
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	414 does not limit the total number of connections to upstream servers
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	415 that an nginx worker process can open.
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	416 The <value>connections</value> parameter should be set to a number small enough
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	417 to let upstream servers process new incoming connections as well.
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	418 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	419 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	420
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	421 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	422 Example configuration of memcached upstream with keepalive connections:
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	423 <example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	424 upstream memcached_backend {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	425 server 127.0.0.1:11211;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	426 server 10.0.0.2:11211;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	427
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	428 keepalive 32;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	429 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	430
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	431 server {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	432 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	433
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	434 location /memcached/ {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	435 set $memcached_key $uri;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	436 memcached_pass memcached_backend;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	437 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	438
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	439 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	440 </example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	441 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	442
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	443 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	444 For HTTP, the <link doc="ngx_http_proxy_module.xml" id="proxy_http_version"/>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	445 directive should be set to “<literal>1.1</literal>”
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	446 and the <header>Connection</header> header field should be cleared:
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	447 <example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	448 upstream http_backend {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	449 server 127.0.0.1:8080;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	450
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	451 keepalive 16;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	452 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	453
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	454 server {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	455 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	456
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	457 location /http/ {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	458 proxy_pass http://http_backend;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	459 proxy_http_version 1.1;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	460 proxy_set_header Connection "";
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	461 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	462 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	463 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	464 </example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	465 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	466
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	467 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	468 <note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	469 Alternatively, HTTP/1.0 persistent connections can be used by passing the
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	470 <header>Connection: Keep-Alive</header> header field to an upstream server,
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	471 though this method is not recommended.
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	472 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	473 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	474
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	475 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	476 For FastCGI servers, it is required to set
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	477 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_keep_conn"/>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	478 for keepalive connections to work:
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	479 <example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	480 upstream fastcgi_backend {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	481 server 127.0.0.1:9000;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	482
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	483 keepalive 8;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	484 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	485
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	486 server {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	487 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	488
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	489 location /fastcgi/ {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	490 fastcgi_pass fastcgi_backend;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	491 fastcgi_keep_conn on;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	492 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	493 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	494 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	495 </example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	496 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	497
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	498 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	499 <note>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	500 When using load balancer methods other than the default
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	501 round-robin method, it is necessary to activate them before
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	502 the <literal>keepalive</literal> directive.
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	503 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	504
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	505 <note>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	506 SCGI and uwsgi protocols do not have a notion of keepalive connections.
316 1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	507 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	508 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	509
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	510 </directive>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	511
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version", Ruslan Ermilov <ru@nginx.com> parents: 293 diff changeset	512
526 4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	513 <directive name="least_conn">
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	514 <syntax/>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	515 <default/>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	516 <context>upstream</context>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	517 <appeared-in>1.3.1</appeared-in>
566 f8148fc88224 Documented 1.2.2 changes. Ruslan Ermilov <ru@nginx.com> parents: 542 diff changeset	518 <appeared-in>1.2.2</appeared-in>
526 4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	519
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	520 <para>
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	521 Specifies that a group should use a load balancing method where a request
526 4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	522 is passed to the server with the least number of active connections,
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn. Ruslan Ermilov <ru@nginx.com> parents: 316 diff changeset	523 taking into account weights of servers.
1232 ab2ea38f3512 Upstream: least_conn description corresponds to the Russian text. Yaroslav Zhuravlev <yar@nginx.com> parents: 1230 diff changeset	524 If there are several such servers, they are tried in turn using a
533 fb630c3c5039 Revamped the upstream documentation somewhat. Ruslan Ermilov <ru@nginx.com> parents: 526 diff changeset	525 weighted round-robin balancing method.
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	526 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	527
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	528 </directive>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	529
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	530
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	531 <directive name="health_check">
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	532 <syntax>[<value>parameters</value>]</syntax>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	533 <default/>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	534 <context>location</context>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	535
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	536 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	537 Enables periodic health checks of the servers in a
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	538 <link id="upstream">group</link> referenced in the surrounding location.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	539 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	540
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	541 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	542 The following optional parameters are supported:
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	543 <list type="tag">
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	544
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	545 <tag-name id="interval">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	546 <literal>interval</literal>=<value>time</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	547 </tag-name>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	548 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	549 sets the interval between two consecutive health checks,
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	550 by default, 5 seconds;
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	551 </tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	552
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	553 <tag-name id="fails">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	554 <literal>fails</literal>=<value>number</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	555 </tag-name>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	556 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	557 sets the number of consecutive failed health checks of a particular server
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	558 after which this server will be considered unhealthy,
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	559 by default, 1;
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	560 </tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	561
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	562 <tag-name id="passes">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	563 <literal>passes</literal>=<value>number</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	564 </tag-name>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	565 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	566 sets the number of consecutive passed health checks of a particular server
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	567 after which the server will be considered healthy,
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	568 by default, 1;
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	569 </tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	570
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	571 <tag-name id="uri">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	572 <literal>uri</literal>=<value>uri</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	573 </tag-name>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	574 <tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	575 defines the URI used in health check requests,
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	576 by default, “<literal>/</literal>”;
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	577 </tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	578
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	579 <tag-name id="hc_match">
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	580 <literal>match</literal>=<value>name</value>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	581 </tag-name>
2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	582 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	583 specifies the <literal>match</literal> block configuring the tests that a
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	584 response should pass in order for a health check to pass;
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	585 by default, the response should have status code 2xx or 3xx.
1241 2246339a6a93 Upstream: added IDs for "server" and "health_check" params. Yaroslav Zhuravlev <yar@nginx.com> parents: 1236 diff changeset	586 </tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	587
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	588 </list>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	589 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	590
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	591 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	592 For example,
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	593 <example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	594 location / {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	595 proxy_pass http://backend;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	596 health_check;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	597 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	598 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	599 will send “<literal>/</literal>” requests to each
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	600 server in the <literal>backend</literal> group every five seconds.
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	601 If any communication error or timeout occurs, or a
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	602 proxied server responds with the status code other than
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	603 2xx or 3xx, the health check will fail, and the server will
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	604 be considered unhealthy.
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	605 Client requests are not passed to unhealthy servers.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	606 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	607
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	608 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	609 Health checks can be configured to test the status code of a response,
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	610 presence of certain header fields and their values,
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	611 and the body contents.
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	612 Tests are configured separately using the <link id="match"/> directive
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	613 and referenced in the <literal>match</literal> parameter.
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	614 For example:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	615 <example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	616 http {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	617 server {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	618 ...
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	619 location / {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	620 proxy_pass http://backend;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	621 health_check match=welcome;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	622 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	623 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	624
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	625 match welcome {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	626 status 200;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	627 header Content-Type = text/html;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	628 body ~ "Welcome to nginx!";
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	629 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	630 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	631 </example>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	632 This configuration tells that for a health check to pass, the response to a
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	633 health check request should succeed,
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	634 have status 200, content type “<literal>text/html</literal>”,
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	635 and contain “<literal>Welcome to nginx!</literal>” in the body.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	636 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	637
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	638 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	639 The server group must reside in the <link id="zone">shared memory</link>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	640 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	641
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	642 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	643 If several health checks are defined for the same group of servers,
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	644 a single failure of any check will make the corresponding server be
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	645 considered unhealthy.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	646 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	647
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	648 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	649 <note>
1348 5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	650 Please note that most of the variables will have empty values
5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	651 when used with health checks.
5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	652 </note>
5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	653 </para>
5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	654
5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	655 <para>
5e45198fa991 Documented that with health checks most variables are useless. Ruslan Ermilov <ru@nginx.com> parents: 1259 diff changeset	656 <note>
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	657 This directive is available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	658 <commercial_version>commercial subscription</commercial_version>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	659 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	660 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	661
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	662 </directive>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	663
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	664
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	665 <directive name="match">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	666 <syntax block="yes"><value>name</value></syntax>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	667 <default/>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	668 <context>http</context>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	669
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	670 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	671 Defines the named test set used to verify responses to health check requests.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	672 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	673
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	674 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	675 The following items can be tested in a response:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	676 <list type="tag">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	677
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	678 <tag-name><literal>status 200;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	679 <tag-desc>status is 200</tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	680
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	681 <tag-name><literal>status ! 500;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	682 <tag-desc>status is not 500</tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	683
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	684 <tag-name><literal>status 200 204;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	685 <tag-desc>status is 200 or 204</tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	686
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	687 <tag-name><literal>status ! 301 302;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	688 <tag-desc>status is neither 301 nor 302</tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	689
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	690 <tag-name><literal>status 200-399;</literal></tag-name>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	691 <tag-desc>status is in the range from 200 to 399</tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	692
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	693 <tag-name><literal>status ! 400-599;</literal></tag-name>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	694 <tag-desc>status is not in the range from 400 to 599</tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	695
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	696 <tag-name><literal>status 301-303 307;</literal></tag-name>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	697 <tag-desc>status is either 301, 302, 303, or 307</tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	698
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	699 </list>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	700
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	701 <list type="tag">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	702
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	703 <tag-name><literal>header Content-Type = text/html;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	704 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	705 header contains <header>Content-Type</header>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	706 with value <literal>text/html</literal>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	707 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	708
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	709 <tag-name><literal>header Content-Type != text/html;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	710 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	711 header contains <header>Content-Type</header>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	712 with value other than <literal>text/html</literal>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	713 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	714
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	715 <tag-name><literal>header Connection ~ close;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	716 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	717 header contains <header>Connection</header>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	718 with value matching regular expression <literal>close</literal>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	719 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	720
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	721 <tag-name><literal>header Connection !~ close;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	722 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	723 header contains <header>Connection</header>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	724 with value not matching regular expression <literal>close</literal>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	725 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	726
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	727 <tag-name><literal>header Host;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	728 <tag-desc>header contains <header>Host</header></tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	729
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	730 <tag-name><literal>header ! X-Accel-Redirect;</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	731 <tag-desc>header lacks <header>X-Accel-Redirect</header></tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	732
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	733 </list>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	734
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	735 <list type="tag">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	736
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	737 <tag-name><literal>body ~ "Welcome to nginx!";</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	738 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	739 body matches regular expression “<literal>Welcome to nginx!</literal>”
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	740 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	741
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	742 <tag-name><literal>body !~ "Welcome to nginx!";</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	743 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	744 body does not match regular expression “<literal>Welcome to nginx!</literal>”
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	745 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	746
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	747 </list>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	748 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	749
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	750 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	751 If several tests are specified,
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	752 the response matches only if it matches all tests.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	753 <note>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	754 Only the first 256k of the response body are examined.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	755 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	756 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	757
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	758 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	759 Examples:
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	760 <example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	761 # status is 200, content type is "text/html",
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	762 # and body contains "Welcome to nginx!"
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	763 match welcome {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	764 status 200;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	765 header Content-Type = text/html;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	766 body ~ "Welcome to nginx!";
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	767 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	768 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	769
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	770 <example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	771 # status is not one of 301, 302, 303, or 307, and header does not have "Refresh:"
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	772 match not_redirect {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	773 status ! 301-303 307;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	774 header ! Refresh;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	775 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	776 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	777
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	778 <example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	779 # status ok and not in maintenance mode
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	780 match server_ok {
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	781 status 200-399;
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	782 body !~ "maintenance mode";
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	783 }
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	784 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	785
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	786 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	787
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	788 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	789 <note>
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	790 This directive is available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	791 <commercial_version>commercial subscription</commercial_version>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	792 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	793 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	794
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	795 </directive>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	796
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	797
1125 9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	798 <directive name="queue">
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	799 <syntax>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	800 <value>number</value>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	801 [<literal>timeout</literal>=<value>time</value>]</syntax>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	802 <default/>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	803 <context>upstream</context>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	804 <appeared-in>1.5.12</appeared-in>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	805
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	806 <para>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	807 If an upstream server cannot be selected immediately
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	808 while processing a request,
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	809 and there are the servers in the group that have reached the
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	810 <link id="max_conns"/> limit,
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	811 the request will be placed into the queue.
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	812 The directive specifies the maximum number of requests that can be in the queue
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	813 at the same time.
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	814 If the queue is filled up,
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	815 or the server to pass the request to cannot been selected within
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	816 the time period specified in the <literal>timeout</literal> parameter,
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	817 an error will be returned to the client.
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	818 </para>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	819
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	820 <para>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	821 The default value of the <literal>timeout</literal> parameter is 60 seconds.
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	822 </para>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	823
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	824 <para>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	825 <note>
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	826 This directive is available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	827 <commercial_version>commercial subscription</commercial_version>.
1125 9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	828 </note>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	829 </para>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	830
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	831 </directive>
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	832
9a95b9026a16 Upstream: reallocated the "queue" directive. Ruslan Ermilov <ru@nginx.com> parents: 1124 diff changeset	833
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	834 <directive name="sticky">
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	835 <syntax>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	836 <literal>cookie</literal> <value>name</value>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	837 [<literal>expires=</literal><value>time</value>]
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	838 [<literal>domain=</literal><value>domain</value>]
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	839 [<literal>path=</literal><value>path</value>]</syntax>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	840 <syntax>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	841 <literal>route</literal> <value>$variable</value> ...</syntax>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	842 <syntax>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	843 <literal>learn</literal>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	844 <literal>create=</literal><value>$variable</value>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	845 <literal>lookup=</literal><value>$variable</value>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	846 <literal>zone=</literal><value>name</value>:<value>size</value>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	847 [<literal>timeout=</literal><value>time</value>]</syntax>
987 edd505634357 Documented the "sticky" directive. Vladimir Homutov <vl@nginx.com> parents: 981 diff changeset	848 <default/>
edd505634357 Documented the "sticky" directive. Vladimir Homutov <vl@nginx.com> parents: 981 diff changeset	849 <context>upstream</context>
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	850 <appeared-in>1.5.7</appeared-in>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	851
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	852 <para>
962 f3754c623e6b Minor editing of the stiky_cookie_insert directive. Egor Nikitin <yegor.nikitin@gmail.com> parents: 960 diff changeset	853 Enables session affinity, which causes requests from the same client to be
960 48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	854 passed to the same server in a group of servers.
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	855 Three methods are available:
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	856 <list type="tag">
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	857 <tag-name id="sticky_cookie"><literal>cookie</literal></tag-name>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	858 <tag-desc>
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	859
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	860 <para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	861 When the <literal>cookie</literal> method is used, information about the
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	862 designated server is passed in an HTTP cookie generated by nginx:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	863 <example>
960 48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	864 upstream backend {
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	865 server backend1.example.com;
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	866 server backend2.example.com;
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	867
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	868 sticky cookie srv_id expires=1h domain=.example.com path=/;
960 48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	869 }
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	870 </example>
960 48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	871 </para>
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	872
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	873 <para>
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	874 A request that comes from a client not yet bound to a particular server
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	875 is passed to the server selected by the configured balancing method.
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	876 Further requests with this cookie will be passed to the designated server.
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	877 If the designated server cannot process a request, the new server is
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	878 selected as if the client has not been bound yet.
960 48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	879 </para>
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	880
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	881 <para>
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	882 The first parameter sets the name of the cookie to be set or inspected.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	883 Additional parameters may be as follows:
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	884 <list type="tag">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	885
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	886 <tag-name><literal>expires</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	887 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	888 Sets the time for which a browser should keep the cookie.
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	889 The special value <literal>max</literal> will cause the cookie to expire on
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	890 “<literal>31 Dec 2037 23:55:55 GMT</literal>”.
960 48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	891 If the parameter is not specified, it will cause the cookie to expire at
48ab154edf10 Upstream: removed obsoleted directives in the "sticky" module. Vladimir Homutov <vl@nginx.com> parents: 956 diff changeset	892 the end of a browser session.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	893 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	894
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	895 <tag-name><literal>domain</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	896 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	897 Defines the domain for which the cookie is set.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	898 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	899
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	900 <tag-name><literal>path</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	901 <tag-desc>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	902 Defines the path for which the cookie is set.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	903 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	904
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	905 </list>
981 fc35441b4856 Fixed grammar. Vladimir Homutov <vl@nginx.com> parents: 969 diff changeset	906 If any parameters are omitted, the corresponding cookie fields are not set.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	907 </para>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	908 </tag-desc>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	909
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	910 <tag-name id="sticky_route"><literal>route</literal></tag-name>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	911 <tag-desc>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	912
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	913 <para>
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	914 When the <literal>route</literal> method is used, proxied server assigns
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	915 client a route on receipt of the first request.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	916 All subsequent requests from this client will carry routing information
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	917 in a cookie or URI.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	918 This information is compared with the “<literal>route</literal>” parameter
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	919 of the <link id="server"/> directive to identify the server to which the
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	920 request should be proxied.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	921 If the designated server cannot process a request, the new server is
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	922 selected by the configured balancing method as if there is no routing
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	923 information in the request.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	924 </para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	925
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	926 <para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	927 The parameters of the <literal>route</literal> method specify variables that
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	928 may contain routing information.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	929 The first non-empty variable is used to find the matching server.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	930 </para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	931
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	932 <para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	933 Example:
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	934 <example>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	935 map $cookie_jsessionid $route_cookie {
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	936 ~.+\.(?P<route>\w+)$ $route;
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	937 }
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	938
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	939 map $request_uri $route_uri {
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	940 ~jsessionid=.+\.(?P<route>\w+)$ $route;
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	941 }
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	942
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	943 upstream backend {
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	944 server backend1.example.com route=a;
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	945 server backend2.example.com route=b;
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	946
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	947 sticky route $route_cookie $route_uri;
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	948 }
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	949 </example>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	950 Here, the route is taken from the “<literal>JSESSIONID</literal>” cookie
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	951 if present in a request.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	952 Otherwise, the route from the URI is used.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	953 </para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	954
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	955 </tag-desc>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	956
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	957 <tag-name id="sticky_learn"><literal>learn</literal></tag-name>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	958 <tag-desc>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	959 <para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	960 When the <literal>learn</literal> method (1.7.1) is used, nginx
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	961 analyzes upstream server responses and learns server-initiated sessions
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	962 usually passed in an HTTP cookie.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	963 <example>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	964 upstream backend {
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	965 server backend1.example.com:8080;
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	966 server backend2.example.com:8081;
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	967
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	968 sticky learn
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	969 create=$upstream_cookie_sessionid
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	970 lookup=$cookie_sessionid
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	971 zone=client_sessions:1m;
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	972 }
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	973 </example>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	974
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	975 In the example, the upstream server creates a session by setting the
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	976 cookie “<literal>SESSIONID</literal>” in the response.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	977 Further requests with this cookie will be passed to the same server.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	978 If the server cannot process the request, the new server is
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	979 selected as if the client has not been bound yet.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	980 </para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	981
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	982 <para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	983 The parameters <literal>create</literal> and <literal>lookup</literal>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	984 specify variables that indicate how new sessions are created and existing
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	985 sessions are searched, respectively.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	986 Both parameters may be specified more than once, in which case the first
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	987 non-empty variable is used.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	988 </para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	989
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	990 <para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	991 Sessions are stored in a shared memory zone, whose <value>name</value> and
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	992 <value>size</value> are configured by the <literal>zone</literal> parameter.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	993 One megabyte zone can store about 8000 sessions on the 64-bit platform.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	994 The sessions that are not accessed during the time specified by the
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	995 <literal>timeout</literal> parameter get removed from the zone.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	996 By default, <literal>timeout</literal> is set to 10 minutes.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	997 </para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	998
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	999 </tag-desc>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1000 </list>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1001 </para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1002
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1003 <para>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1004 <note>
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	1005 This directive is available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	1006 <commercial_version>commercial subscription</commercial_version>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1007 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1008 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1009
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1010 </directive>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1011
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1012
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1013 <directive name="sticky_cookie_insert">
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1014 <syntax><value>name</value>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1015 [<literal>expires=</literal><value>time</value>]
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1016 [<literal>domain=</literal><value>domain</value>]
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1017 [<literal>path=</literal><value>path</value>]</syntax>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1018 <default/>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1019 <context>upstream</context>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1020
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1021 <para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1022 This directive is obsolete since version 1.5.7.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1023 An equivalent
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1024 <link id="sticky"/> directive with a new syntax should be used instead:
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1025 <note>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1026 <literal>sticky cookie</literal> <value>name</value>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1027 [<literal>expires=</literal><value>time</value>]
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1028 [<literal>domain=</literal><value>domain</value>]
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1029 [<literal>path=</literal><value>path</value>];
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1030 </note>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1031 </para>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1032
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1033 </directive>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1034
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1035
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1036 <directive name="upstream_conf">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1037 <syntax/>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1038 <default/>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1039 <context>location</context>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1040
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1041 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	1042 Turns on the HTTP interface of upstream configuration in the surrounding
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	1043 location.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1044 Access to this location should be
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1045 <link doc="ngx_http_core_module.xml" id="satisfy">limited</link>.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1046 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1047
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1048 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	1049 Configuration commands can be used to:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1050 <list type="bullet">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1051
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1052 <listitem>view the group configuration;</listitem>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1053
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	1054 <listitem>view, modify, or remove a server;</listitem>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1055
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1056 <listitem>add a new server.</listitem>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1057
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1058 </list>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1059 <note>
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	1060 Since addresses in a group are not required to be unique, specific
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1061 servers in a group are referenced by their IDs.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1062 IDs are assigned automatically and shown when adding a new server
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1063 or viewing the group configuration.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1064 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1065 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1066
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1067 <para>
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	1068 A configuration command consists of parameters passed as request arguments,
488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	1069 for example:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1070 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1071 http://127.0.0.1/upstream_conf?upstream=dynamic
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1072 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1073 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1074
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1075 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1076 The following parameters are supported:
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1077
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1078 <list type="tag" compact="no">
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1079
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1080 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1081 <literal>upstream=</literal><value>name</value></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1082 <tag-desc>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1083 Selects a group to work with.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1084 This parameter is mandatory.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1085 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1086
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1087 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1088 <literal>id=</literal><value>number</value></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1089 <tag-desc>
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	1090 Selects a server for viewing, modifying, or removing.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1091 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1092
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1093 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1094 <literal>remove=</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1095 <tag-desc>
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	1096 Removes a server from the group.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1097 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1098
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1099 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1100 <literal>add=</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1101 <tag-desc>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1102 Adds a new server to the group.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1103 </tag-desc>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1104
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1105 <tag-name>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1106 <literal>backup=</literal></tag-name>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1107 <tag-desc>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1108 Required to add a backup server.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1109 <note>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1110 Before version 1.7.2, <literal>backup=</literal>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1111 was also required to view, modify, or remove existing backup servers.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1112 </note>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1113 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1114
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1115 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1116 <literal>server=</literal><value>address</value></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1117 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1118 Same as the “<literal>address</literal>” parameter
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1119 of the <link id="server"/> directive.
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1120 <para>
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1121 When adding a server, it is possible to specify it as a domain name.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1122 In this case, changes of the IP addresses that correspond to a domain name
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1123 will be monitored and automatically applied to the upstream
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1124 configuration without the need of restarting nginx (1.7.2).
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1125 This requires the
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1126 <link doc="ngx_http_core_module.xml" id="resolver"/> directive in the
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1127 <link doc="ngx_http_core_module.xml" id="http"/> block.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1128 See also
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1129 the <link id="resolve"/> parameter of the <link id="server"/> directive.
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1130 </para>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1131 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1132
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1133 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1134 <literal>weight=</literal><value>number</value></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1135 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1136 Same as the “<literal>weight</literal>” parameter
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1137 of the <link id="server"/> directive.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1138 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1139
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1140 <tag-name>
1386 d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1141 <literal>max_conns=</literal><value>number</value></tag-name>
d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1142 <tag-desc>
d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1143 Same as the “<literal>max_conns</literal>” parameter
d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1144 of the <link id="server"/> directive.
d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1145 </tag-desc>
d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1146
d796c95f0922 Relocated the max_conns parameter in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1385 diff changeset	1147 <tag-name>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1148 <literal>max_fails=</literal><value>number</value></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1149 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1150 Same as the “<literal>max_fails</literal>” parameter
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1151 of the <link id="server"/> directive.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1152 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1153
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1154 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1155 <literal>fail_timeout=</literal><value>time</value></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1156 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1157 Same as the “<literal>fail_timeout</literal>” parameter
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1158 of the <link id="server"/> directive.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1159 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1160
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1161 <tag-name>
955 28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1162 <literal>slow_start=</literal><value>time</value></tag-name>
28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1163 <tag-desc>
28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1164 Same as the “<literal>slow_start</literal>” parameter
28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1165 of the <link id="server"/> directive.
28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1166 </tag-desc>
28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1167
28d580f1eb63 Documented the "slow_start" parameter of the upstream "server" directive. Vladimir Homutov <vl@nginx.com> parents: 953 diff changeset	1168 <tag-name>
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1169 <literal>down=</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1170 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1171 Same as the “<literal>down</literal>” parameter
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1172 of the <link id="server"/> directive.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1173 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1174
1367 f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1175 <tag-name id="drain"><literal>drain=</literal></tag-name>
f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1176 <tag-desc>
f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1177 Puts the upstream server in the “draining” mode (1.7.5).
f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1178 In this mode, only requests <link id="sticky">bound</link> to the server
f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1179 will be proxied to it.
f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1180 </tag-desc>
f1e14d87d833 Updated commercial docs for the upcoming release. Ruslan Ermilov <ru@nginx.com> parents: 1348 diff changeset	1181
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1182 <tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1183 <literal>up=</literal></tag-name>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1184 <tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1185 The opposite of the “<literal>down</literal>” parameter
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1186 of the <link id="server"/> directive.
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1187 </tag-desc>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1188
1026 3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1189 <tag-name>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1190 <literal>route=</literal><value>string</value></tag-name>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1191 <tag-desc>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1192 Same as the “<literal>route</literal>” parameter
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1193 of the <link id="server"/> directive.
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1194 </tag-desc>
3056640d5022 Upstream: documented new "sticky" features. Ruslan Ermilov <ru@nginx.com> parents: 1011 diff changeset	1195
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1196 </list>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1197
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1198 The first two parameters select an object.
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	1199 This can be either the whole group or a specific server.
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1200 Without other parameters, the configuration of the selected
954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1201 group or server is shown.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1202 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1203
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1204 <para>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1205 For example, to view the configuration of the whole group, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1206 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1207 http://127.0.0.1/upstream_conf?upstream=dynamic
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1208 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1209
1418 23b409d1f5c7 Revised usage of "individual server" in upstream_conf. Yaroslav Zhuravlev <yar@nginx.com> parents: 1410 diff changeset	1210 To view the configuration of a specific server, also specify its ID:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1211 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1212 http://127.0.0.1/upstream_conf?upstream=dynamic&id=42
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1213 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1214 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1215
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1216 <para>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1217 To add a new server,
956 488a3f738db0 Text revision of commercial modules. Egor Nikitin <yegor.nikitin@gmail.com> parents: 955 diff changeset	1218 specify its address in the “<literal>server=</literal>” parameter.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1219 Without other parameters specified, a server will be added with other
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1220 parameters set to their default values (see the <link id="server"/> directive).
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1221 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1222
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1223 <para>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1224 For example, to add a new primary server, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1225 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1226 http://127.0.0.1/upstream_conf?add=&upstream=dynamic&server=127.0.0.1:8080
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1227 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1228
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1229 To add a new backup server, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1230 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1231 http://127.0.0.1/upstream_conf?add=&upstream=dynamic&backup=&server=127.0.0.1:8080
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1232 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1233
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1234 To add a new primary server,
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1235 set its parameters to non-default values
968 fa19bacf6e1e Unified upstream server up/down state terminology. Vladimir Homutov <vl@nginx.com> parents: 966 diff changeset	1236 and mark it as “<literal>down</literal>”, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1237 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1238 http://127.0.0.1/upstream_conf?add=&upstream=dynamic&server=127.0.0.1:8080&weight=2&down=
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1239 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1240 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1241
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1242 <para>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1243 To remove a server, specify its ID:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1244 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1245 http://127.0.0.1/upstream_conf?remove=&upstream=dynamic&id=42
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1246 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1247 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1248
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1249 <para>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1250 To mark an existing server as “<literal>down</literal>”, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1251 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1252 http://127.0.0.1/upstream_conf?upstream=dynamic&id=42&down=
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1253 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1254
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1255 To modify the address of an existing server, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1256 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1257 http://127.0.0.1/upstream_conf?upstream=dynamic&id=42&server=192.0.2.3:8123
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1258 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1259
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1260 To modify other parameters of an existing server, send:
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1261 <example>
1259 954dcc02cb63 Upstream: "session learn" sticky method and upstream_conf changes. Ruslan Ermilov <ru@nginx.com> parents: 1241 diff changeset	1262 http://127.0.0.1/upstream_conf?upstream=dynamic&id=42&max_fails=3&weight=4
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1263 </example>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1264
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1265 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1266
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1267 <para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1268 <note>
1128 1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	1269 This directive is available as part of our
1594ed379f1f De-i18n'ed <commercial_version/>. Ruslan Ermilov <ru@nginx.com> parents: 1127 diff changeset	1270 <commercial_version>commercial subscription</commercial_version>.
953 aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1271 </note>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1272 </para>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1273
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1274 </directive>
aded7086e84f Commercial version documentation. Ruslan Ermilov <ru@nginx.com> parents: 942 diff changeset	1275
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1276 </section>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1277
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1278
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1279 <section id="variables" name="Embedded Variables">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1280
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1281 <para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1282 The <literal>ngx_http_upstream_module</literal> module
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1283 supports the following embedded variables:
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1284 <list type="tag">
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1285
1155 07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1286 <tag-name id="var_upstream_addr"><var>$upstream_addr</var></tag-name>
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1287 <tag-desc>
1391 0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1288 keeps the IP address and port,
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1289 or the path to the UNIX-domain socket of the upstream server.
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1290 If several servers were contacted during request processing,
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1291 their addresses are separated by commas, e.g.
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1292 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock</literal>”.
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	1293 If an internal redirect from one server group to another happens,
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	1294 initiated by
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1295 <header>X-Accel-Redirect</header> or
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	1296 <link doc="ngx_http_core_module.xml" id="error_page"/>,
95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	1297 then the server addresses from different groups are separated by colons, e.g.
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1298 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock : 192.168.10.1:80, 192.168.10.2:80</literal>”.
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1299 </tag-desc>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1300
1155 07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1301 <tag-name id="var_upstream_cache_status"><var>$upstream_cache_status</var>
07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1302 </tag-name>
731 f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1303 <tag-desc>
966 95c3c3bbf1ce Text review. Egor Nikitin <yegor.nikitin@gmail.com> parents: 962 diff changeset	1304 keeps the status of accessing a response cache (0.8.3).
1075 6c021feec587 Removed unjustified non-breakable spaces. Ruslan Ermilov <ru@nginx.com> parents: 1026 diff changeset	1305 The status can be either “<literal>MISS</literal>”,
731 f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1306 “<literal>BYPASS</literal>”, “<literal>EXPIRED</literal>”,
1011 2ad2f30efdf2 Documented the "fastcgi_" and "proxy_cache_revalidate" directives. Vladimir Homutov <vl@nginx.com> parents: 1003 diff changeset	1307 “<literal>STALE</literal>”, “<literal>UPDATING</literal>”,
1391 0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1308 “<literal>REVALIDATED</literal>”, or “<literal>HIT</literal>”.
731 f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1309 </tag-desc>
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1310
1186 8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1311 <tag-name id="var_upstream_cookie_"><var>$upstream_cookie_</var><value>name</value>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1312 </tag-name>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1313 <tag-desc>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1314 cookie with the specified <value>name</value> sent by the upstream server
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1315 in the <header>Set-Cookie</header> response header field (1.7.1).
1391 0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1316 Only the cookies from the response of the last server are saved.
1186 8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1317 </tag-desc>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables. Ruslan Ermilov <ru@nginx.com> parents: 1181 diff changeset	1318
1393 15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1319 <tag-name id="var_upstream_header_time"><var>$upstream_header_time</var>
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1320 </tag-name>
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1321 <tag-desc>
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1322 keeps time
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1323 spent on receiving the response header from the upstream server (1.7.10);
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1324 the time is kept in seconds with millisecond resolution.
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1325 Times of several responses
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1326 are separated by commas and colons like addresses in the
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1327 <link id="var_upstream_addr">$upstream_addr</link> variable.
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1328 </tag-desc>
15e8779f0ceb Documented the $upstream_header_time variable. Ruslan Ermilov <ru@nginx.com> parents: 1392 diff changeset	1329
1392 82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1330 <tag-name id="var_upstream_http_"><var>$upstream_http_</var><value>name</value></tag-name>
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1331 <tag-desc>
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1332 keep server response header fields.
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1333 For example, the <header>Server</header> response header field
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1334 is available through the <var>$upstream_http_server</var> variable.
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1335 The rules of converting header field names to variable names are the same
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1336 as for the variables that start with the
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1337 “<link doc="ngx_http_core_module.xml" id="var_http_">$http_</link>” prefix.
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1338 Only the header fields from the response of the last server are saved.
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1339 </tag-desc>
82e62822abe8 Sorted upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1391 diff changeset	1340
1155 07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1341 <tag-name id="var_upstream_response_length"><var>$upstream_response_length</var>
07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1342 </tag-name>
731 f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1343 <tag-desc>
1391 0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1344 keeps the length of the response obtained from the upstream server (0.7.27);
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1345 the length is kept in bytes.
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1346 Lengths of several responses
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1347 are separated by commas and colons like addresses in the
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1348 <link id="var_upstream_addr">$upstream_addr</link> variable.
731 f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1349 </tag-desc>
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables. Vladimir Homutov <vl@nginx.com> parents: 654 diff changeset	1350
1155 07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1351 <tag-name id="var_upstream_response_time"><var>$upstream_response_time</var>
07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1352 </tag-name>
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1353 <tag-desc>
1391 0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1354 keeps time spent on receiving the response from the upstream server;
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1355 the time is kept in seconds with millisecond resolution.
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1356 Times of several responses
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1357 are separated by commas and colons like addresses in the
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1358 <link id="var_upstream_addr">$upstream_addr</link> variable.
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1359 </tag-desc>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1360
1155 07402a11fd8d Assigned IDs to tags describing variables. Vladimir Homutov <vl@nginx.com> parents: 1128 diff changeset	1361 <tag-name id="var_upstream_status"><var>$upstream_status</var></tag-name>
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1362 <tag-desc>
1391 0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1363 keeps status code of the response obtained from the upstream server.
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1364 Status codes of several responses
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1365 are separated by commas and colons like addresses in the
0702cc081c63 Revised descriptions of upstream module variables. Ruslan Ermilov <ru@nginx.com> parents: 1386 diff changeset	1366 <link id="var_upstream_addr">$upstream_addr</link> variable.
293 34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1367 </tag-desc>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1368
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1369 </list>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1370 </para>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1371
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1372 </section>
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1373
34246e706f48 English translation of the ngx_http_upstream_module documentation. Ruslan Ermilov <ru@nginx.com> parents: diff changeset	1374 </module>

Mercurial > hg > nginx-site

annotate xml/en/docs/http/ngx_http_upstream_module.xml @ 1418:23b409d1f5c7