Mercurial > hg > nginx-site
annotate xml/en/docs/http/ngx_http_upstream_module.xml @ 556:345012910707
Documented the "events" and "use" directives.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Wed, 27 Jun 2012 11:39:27 +0000 |
parents | a9e6a8613534 |
children | f8148fc88224 |
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 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
3 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
4 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
5 <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
|
6 link="/en/docs/http/ngx_http_upstream_module.html" |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
7 lang="en"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
8 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
9 <section id="summary"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
10 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
11 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
12 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
|
13 allows to define groups of servers that can be referenced |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
14 from the <link doc="ngx_http_proxy_module.xml" id="proxy_pass"/>, |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
15 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass"/>, and |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
16 <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
|
17 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
18 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
19 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
20 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
21 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
22 <section id="example" name="Example Configuration"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
23 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
24 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
25 <example> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
26 upstream <emphasis>backend</emphasis> { |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
27 server backend1.example.com weight=5; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
28 server backend2.example.com:8080; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
29 server unix:/tmp/backend3; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
30 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
31 server backup1.example.com:8080 backup; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
32 server backup2.example.com:8080 backup; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
33 } |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
34 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
35 server { |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
36 location / { |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
37 proxy_pass http://<emphasis>backend</emphasis>; |
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 } |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
40 </example> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
41 </para> |
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 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
44 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
45 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
46 <section id="directives" name="Directives"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
47 |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
48 <directive name="upstream"> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
49 <syntax block="yes"><value>name</value></syntax> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
50 <default/> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
51 <context>http</context> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
52 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
53 <para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
54 Defines a group of servers. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
55 Servers can listen on different ports. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
56 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
|
57 can be mixed. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
58 </para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
59 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
60 <para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
61 Example: |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
62 <example> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
63 upstream backend { |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
64 server backend1.example.com weight=5; |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
65 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
|
66 server unix:/tmp/backend3; |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
67 } |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
68 </example> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
69 </para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
70 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
71 <para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
72 By default, requests are distributed between servers using a |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
73 weighted round-robin balancing method. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
74 In the above example, each 7 requests will be distributed as follows: |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
75 5 requests to <literal>backend1.example.com</literal> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
76 and one request to each of second and third servers. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
77 If an error occurs when communicating with the server, a request will |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
78 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
|
79 servers will be tried. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
80 If a successful response could not be obtained from any of the servers, |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
81 the client will be returned the result of contacting the last server. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
82 </para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
83 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
84 </directive> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
85 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
86 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
87 <directive name="server"> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
88 <syntax><value>address</value> [<value>parameters</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>upstream</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 an <value>address</value> and other <value>parameters</value> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
94 of the server. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
95 An address can be specified as a domain name or IP address, |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
96 and an optional port, or as a UNIX-domain socket path |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
97 specified after the “<literal>unix:</literal>” prefix. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
98 If port is not specified, the port 80 is used. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
99 A domain name that resolves to several IP addresses essentially defines |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
100 multiple servers. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
101 </para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
102 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
103 <para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
104 The following parameters can be defined: |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
105 <list type="tag"> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
106 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
107 <tag-name><literal>weight</literal>=<value>number</value></tag-name> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
108 <tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
109 sets a weight of the server, by default 1. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
110 </tag-desc> |
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 <tag-name><literal>max_fails</literal>=<value>number</value></tag-name> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
113 <tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
114 sets a number of unsuccessful attempts to communicate with the server |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
115 during a time set by the <literal>fail_timeout</literal> parameter |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
116 after which it will be considered down for a period of time also set |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
117 by the <literal>fail_timeout</literal> parameter. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
118 By default, the number of unsuccessful attempts is set to 1. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
119 A value of zero disables accounting of attempts. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
120 What is considered to be an unsuccessful attempt is configured by the |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
121 <link doc="ngx_http_proxy_module.xml" id="proxy_next_upstream"/>, |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
122 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_next_upstream"/>, and |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
123 <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
|
124 directives. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
125 The <literal>http_404</literal> state is not considered |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
126 an unsuccessful attempt. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
127 </tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
128 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
129 <tag-name><literal>fail_timeout</literal>=<value>time</value></tag-name> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
130 <tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
131 sets |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
132 <list type="bullet"> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
133 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
134 <listitem> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
135 a time during which the specified number of unsuccessful attempts to |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
136 communicate with the server should happen for the server to be |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
137 considered down; |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
138 </listitem> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
139 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
140 <listitem> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
141 and a period of time the server will be considered down. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
142 </listitem> |
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 </list> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
145 By default, timeout is set to 10 seconds. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
146 </tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
147 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
148 <tag-name><literal>backup</literal></tag-name> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
149 <tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
150 marks the server as a backup server. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
151 It will be passed requests when the primary servers are down. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
152 </tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
153 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
154 <tag-name><literal>down</literal></tag-name> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
155 <tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
156 marks the server as permanently down; used along with |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
157 the <link id="ip_hash"/> directive. |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
158 </tag-desc> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
159 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
160 </list> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
161 </para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
162 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
163 <para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
164 Example: |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
165 <example> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
166 upstream backend { |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
167 server backend1.example.com weight=5; |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
168 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
|
169 server unix:/tmp/backend3; |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
170 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
171 server backup1.example.com:8080 backup; |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
172 } |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
173 </example> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
174 </para> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
175 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
176 </directive> |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
177 |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
178 |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
179 <directive name="ip_hash"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
180 <syntax/> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
181 <default/> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
182 <context>upstream</context> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
183 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
184 <para> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
185 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
|
186 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
|
187 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
|
188 are used as a hashing key. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
189 The method ensures that requests of the same client will always be |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
190 passed to the same server except when this server is considered down |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
191 in which case client requests will be passed to another server and |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
192 most probably it will also be the same server. |
542
a9e6a8613534
Documented IPv6 support in ip_hash.
Ruslan Ermilov <ru@nginx.com>
parents:
533
diff
changeset
|
193 <note> |
a9e6a8613534
Documented IPv6 support in ip_hash.
Ruslan Ermilov <ru@nginx.com>
parents:
533
diff
changeset
|
194 IPv6 addresses are supported starting from version 1.3.2. |
a9e6a8613534
Documented IPv6 support in ip_hash.
Ruslan Ermilov <ru@nginx.com>
parents:
533
diff
changeset
|
195 </note> |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
196 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
197 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
198 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
199 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
|
200 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
|
201 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
|
202 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
203 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
204 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
205 Example: |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
206 <example> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
207 upstream backend { |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
208 ip_hash; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
209 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
210 server backend1.example.com; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
211 server backend2.example.com; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
212 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
|
213 server backend4.example.com; |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
214 } |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
215 </example> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
216 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
217 |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
218 <para> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
219 <note> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
220 Until version 1.3.1 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
|
221 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
|
222 </note> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
223 </para> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
224 |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
225 </directive> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
226 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
227 |
316
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
228 <directive name="keepalive"> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
229 <syntax><value>connections</value></syntax> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
230 <default/> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
231 <context>upstream</context> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
232 <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
|
233 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
234 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
235 Activates cache of connections to upstream servers. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
236 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
237 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
238 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
239 The <value>connections</value> parameter sets the maximum number of |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
240 keepalive connections to upstream servers that are retained in |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
241 the cache per one worker process. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
242 If there are more idle connections to retain to an upstream than |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
243 are specified by this number, the least recently used ones will |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
244 be closed. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
245 <note> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
246 It should be noted that <literal>keepalive</literal> directive |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
247 does not limit the total number of connections that nginx worker |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
248 process can open to upstream servers. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
249 The new connections are always created on demand. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
250 The <value>connections</value> parameter should be set low enough |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
251 to allow upstream servers to process additional new incoming |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
252 connections as well. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
253 </note> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
254 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
255 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
256 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
257 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
|
258 <example> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
259 upstream memcached_backend { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
260 server 127.0.0.1:11211; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
261 server 10.0.0.2:11211; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
262 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
263 keepalive 32; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
264 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
265 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
266 server { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
267 ... |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
268 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
269 location /memcached/ { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
270 set $memcached_key $uri; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
271 memcached_pass memcached_backend; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
272 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
273 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
274 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
275 </example> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
276 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
277 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
278 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
279 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
|
280 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
|
281 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
|
282 <example> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
283 upstream http_backend { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
284 server 127.0.0.1:8080; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
285 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
286 keepalive 16; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
287 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
288 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
289 server { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
290 ... |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
291 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
292 location /http/ { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
293 proxy_pass http://http_backend; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
294 proxy_http_version 1.1; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
295 proxy_set_header Connection ""; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
296 ... |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
297 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
298 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
299 </example> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
300 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
301 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
302 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
303 <note> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
304 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
|
305 <header>Connection: Keep-Alive</header> header field to an upstream server, |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
306 though this is not recommended. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
307 </note> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
308 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
309 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
310 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
311 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
|
312 <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
|
313 for keepalive connections to work: |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
314 <example> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
315 upstream fastcgi_backend { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
316 server 127.0.0.1:9000; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
317 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
318 keepalive 8; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
319 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
320 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
321 server { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
322 ... |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
323 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
324 location /fastcgi/ { |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
325 fastcgi_pass fastcgi_backend; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
326 fastcgi_keep_conn on; |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
327 ... |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
328 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
329 } |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
330 </example> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
331 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
332 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
333 <para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
334 <note> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
335 When using load balancer methods other than the default |
316
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
336 round-robin, it is necessary to activate them before |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
337 the <literal>keepalive</literal> directive. |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
338 </note> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
339 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
340 <note> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
341 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
|
342 </note> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
343 </para> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
344 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
345 </directive> |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
346 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents:
293
diff
changeset
|
347 |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
348 <directive name="least_conn"> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
349 <syntax/> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
350 <default/> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
351 <context>upstream</context> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
352 <appeared-in>1.3.1</appeared-in> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
353 |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
354 <para> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
355 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
|
356 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
|
357 taking into account weights of servers. |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
358 If there are several such servers, they are tried using a |
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
359 weighted round-robin balancing method. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
360 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
361 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
362 </directive> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
363 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
364 </section> |
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 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
367 <section id="variables" name="Embedded Variables"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
368 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
369 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
370 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
|
371 supports the following embedded variables: |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
372 <list type="tag"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
373 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
374 <tag-name><var>$upstream_addr</var></tag-name> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
375 <tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
376 keeps an IP address and port of the server, |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
377 or a path to the UNIX-domain socket. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
378 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
|
379 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
|
380 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock</literal>”. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
381 If an internal redirect from one server group to another happened |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
382 using |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
383 <header>X-Accel-Redirect</header> or |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
384 <link doc="ngx_http_core_module.xml" id="error_page"/> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
385 then these server groups are separated by colons, e.g. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
386 “<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
|
387 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
388 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
389 <tag-name><var>$upstream_response_time</var></tag-name> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
390 <tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
391 keeps servers response times in seconds with a milliseconds resolution. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
392 Several responses are also separated by commas and colons. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
393 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
394 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
395 <tag-name><var>$upstream_status</var></tag-name> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
396 <tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
397 keeps servers response codes. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
398 Several responses are also separated by commas and colons. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
399 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
400 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
401 <tag-name><var>$upstream_http_...</var></tag-name> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
402 <tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
403 keep server response header fields. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
404 For example, the <header>Server</header> response header field |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
405 is made available through the <var>$upstream_http_server</var> variable. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
406 Note that only the last server’s response header fields are saved. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
407 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
408 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
409 </list> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
410 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
411 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
412 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
413 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
414 </module> |