annotate xml/ru/docs/http/ngx_http_upstream_module.xml @ 1230:6cc809881694

Upstream: added the "hash" directive.
author Yaroslav Zhuravlev <yar@nginx.com>
date Tue, 17 Jun 2014 17:05:37 +0400
parents 9264fdb6c833
children 314801ed88e7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 <?xml version="1.0"?>
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2
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3 <!--
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4 Copyright (C) Igor Sysoev
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5 Copyright (C) Nginx, Inc.
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6 -->
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7
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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9
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10 <module name="Модуль ngx_http_upstream_module"
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11 link="/ru/docs/http/ngx_http_upstream_module.html"
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12 lang="ru"
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13 rev="6">
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14
110
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15 <section id="summary">
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16
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17 <para>
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18 Модуль <literal>ngx_http_upstream_module</literal>
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19 позволяет описывать группы серверов,
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20 которые могут использоваться в директивах
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21 <link doc="ngx_http_proxy_module.xml" id="proxy_pass"/>,
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22 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass"/>,
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23 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_pass"/>,
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24 <link doc="ngx_http_scgi_module.xml" id="scgi_pass"/> и
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25 <link doc="ngx_http_memcached_module.xml" id="memcached_pass"/>.
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26 </para>
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27
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28 </section>
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29
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30
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31 <section id="example" name="Пример конфигурации">
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32
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33 <para>
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34 <example>
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35 upstream <emphasis>backend</emphasis> {
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36 server backend1.example.com weight=5;
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37 server backend2.example.com:8080;
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38 server unix:/tmp/backend3;
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39
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40 server backup1.example.com:8080 backup;
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41 server backup2.example.com:8080 backup;
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42 }
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43
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44 server {
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45 location / {
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46 proxy_pass http://<emphasis>backend</emphasis>;
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47 }
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48 }
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49 </example>
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50 </para>
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51
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52 </section>
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54
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55 <section id="directives" name="Директивы">
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56
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57 <directive name="upstream">
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58 <syntax block="yes"><value>название</value></syntax>
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59 <default/>
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60 <context>http</context>
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61
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62 <para>
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63 Описывает группу серверов.
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64 Серверы могут слушать на разных портах.
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65 Кроме того, можно одновременно использовать серверы,
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66 слушающие на TCP- и UNIX-сокетах.
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67 </para>
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68
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69 <para>
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70 Пример:
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71 <example>
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72 upstream backend {
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73 server backend1.example.com weight=5;
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74 server 127.0.0.1:8080 max_fails=3 fail_timeout=30s;
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75 server unix:/tmp/backend3;
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76
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77 server backup1.example.com backup;
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78 }
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79 </example>
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80 </para>
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81
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82 <para>
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83 По умолчанию запросы распределяются по серверам циклически
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84 (в режиме round-robin) с учётом весов серверов.
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85 В вышеприведённом примере каждые 7 запросов будут распределены так:
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86 5 запросов на <literal>backend1.example.com</literal>
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87 и по одному запросу на второй и третий серверы.
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88 Если при попытке работы с сервером происходит ошибка, то запрос
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89 передаётся следующему серверу, и так далее до тех пор, пока не будут опробованы
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90 все работающие серверы.
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91 Если не удастся получить успешный ответ
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92 ни от одного из серверов, то клиенту будет возвращён результат работы
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93 с последним сервером.
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94 </para>
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95
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96 </directive>
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97
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98
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99 <directive name="server">
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100 <syntax><value>адрес</value> [<value>параметры</value>]</syntax>
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101 <default/>
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102 <context>upstream</context>
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103
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104 <para>
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105 Задаёт <value>адрес</value> и другие <value>параметры</value>
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106 сервера.
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107 Адрес может быть указан в виде доменного имени или IP-адреса,
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108 и необязательного порта, или в виде пути UNIX-сокета, который
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109 указывается после префикса “<literal>unix:</literal>”.
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110 Если порт не указан, используется порт 80.
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111 Доменное имя, которому соответствует несколько IP-адресов,
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112 задаёт сразу несколько серверов.
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113 </para>
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114
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115 <para>
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116 Могут быть заданы следующие параметры:
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117 <list type="tag">
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118
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119 <tag-name><literal>weight</literal>=<value>число</value></tag-name>
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120 <tag-desc>
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121 задаёт вес сервера, по умолчанию 1.
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122 </tag-desc>
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123
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124 <tag-name><literal>max_fails</literal>=<value>число</value></tag-name>
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125 <tag-desc>
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126 задаёт число неудачных попыток работы с сервером, которые должны произойти
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127 в промежуток времени, заданный параметром <literal>fail_timeout</literal>,
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128 чтобы сервер считался неработающим на период времени, также заданный
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129 параметром <literal>fail_timeout</literal>.
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130 По умолчанию число попыток устанавливается равным 1.
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131 Нулевое значение отключает учёт попыток.
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132 Что считается неудачной попыткой, определяется директивами
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133 <link doc="ngx_http_proxy_module.xml" id="proxy_next_upstream"/>,
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134 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_next_upstream"/>,
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135 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_next_upstream"/>,
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136 <link doc="ngx_http_scgi_module.xml" id="scgi_next_upstream"/> и
533
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137 <link doc="ngx_http_memcached_module.xml" id="memcached_next_upstream"/>.
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138 </tag-desc>
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139
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140 <tag-name><literal>fail_timeout</literal>=<value>время</value></tag-name>
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141 <tag-desc>
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142 задаёт
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143 <list type="bullet">
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144
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145 <listitem>
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146 время, в течение которого должно произойти заданное число неудачных
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147 попыток работы с сервером для того, чтобы сервер считался неработающим;
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148 </listitem>
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149
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150 <listitem>
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151 и время, в течение которого сервер будет считаться неработающим.
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152 </listitem>
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153
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154 </list>
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155 По умолчанию параметр равен 10 секундам.
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156 </tag-desc>
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157
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158 <tag-name><literal>backup</literal></tag-name>
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159 <tag-desc>
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160 помечает сервер как запасной сервер.
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161 На него будут передаваться запросы в случае, если не работают основные серверы.
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162 </tag-desc>
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163
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164 <tag-name><literal>down</literal></tag-name>
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165 <tag-desc>
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166 помечает сервер как постоянно неработающий; используется
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167 совместно с директивой <link id="ip_hash"/>.
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168 </tag-desc>
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169
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170 </list>
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171 </para>
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172
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173 <para>
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174 Кроме того,
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175 следующие параметры доступны как часть
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176 <commercial_version>коммерческой подписки</commercial_version>:
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177 <list type="tag">
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178
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179 <tag-name id="max_conns">
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180 <literal>max_conns</literal>=<value>число</value>
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181 </tag-name>
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182 <tag-desc>
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183 ограничивает максимальное <value>число</value> одновременных соединений
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184 к проксируемому серверу (1.5.9).
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185 Значение по умолчанию равно 0 и означает, что ограничения нет.
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186 </tag-desc>
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187
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188 <tag-name id="resolve">
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189 <literal>resolve</literal>
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190 </tag-name>
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191 <tag-desc>
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192 отслеживает изменения IP-адресов, соответствующих доменному имени сервера,
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193 и автоматически изменяет конфигурацию группы
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194 без необходимости перезапуска nginx (1.5.12).
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195 <para>
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196 Для работы этого параметра
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197 директива <link doc="ngx_http_core_module.xml" id="resolver"/>
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198 должна быть задана в блоке
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199 <link doc="ngx_http_core_module.xml" id="http"/>.
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200 Пример:
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201 <example>
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202 http {
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203 resolver 10.0.0.1;
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204
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205 upstream u {
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206 zone ...;
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207 ...
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208 server example.com resolve;
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209 }
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210 }
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211 </example>
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212 </para>
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213 </tag-desc>
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214
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215 </list>
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216 </para>
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217
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218 </directive>
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219
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220
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221 <directive name="zone">
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222 <syntax><value>имя</value> <value>размер</value></syntax>
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223 <default/>
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224 <context>upstream</context>
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225
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226 <para>
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227 Задаёт <value>имя</value> и <value>размер</value> зоны разделяемой памяти,
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228 в которой хранятся конфигурация группы и рабочее состояние,
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229 разделяемые между рабочими процессами.
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230 В таких группах возможно изменение состава группы или
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231 настроек отдельных серверов без необходимости перезапуска nginx.
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232 Конфигурация доступна через специальный location,
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233 для которого указана директива <link id="upstream_conf"/>.
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234 </para>
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235
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236 <para>
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237 <note>
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238 Эта директива доступна как часть
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239 <commercial_version>коммерческой подписки</commercial_version>.
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240 </note>
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241 </para>
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242
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243 </directive>
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244
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245
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246 <directive name="hash">
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247 <syntax><value>ключ</value> [<literal>consistent</literal>]</syntax>
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248 <default/>
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249 <context>upstream</context>
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250 <appeared-in>1.7.2</appeared-in>
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251
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252 <para>
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253 Задаёт метод балансировки нагрузки для группы, при котором
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254 соответствие клиента серверу определяется при помощи
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255 хэшированного значения <value>ключа</value>.
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256 В качестве <value>ключа</value> может использоваться
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257 текст, переменные и их комбинации.
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258 Следует отметить, что любое добавление или удаление серверов в группе
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259 может привести к перераспределению большинства ключей на другие серверы.
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260 Метод совместим с библиотекой Perl
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261 <link url="http://search.cpan.org/perldoc?Cache%3A%3AMemcached">Cache::Memcached</link>.
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262 </para>
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263
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264 <para>
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265 Если задан параметр <literal>consistent</literal>, то вместо
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266 вышеописанного метода будет использоваться метод консистентного хэширования
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267 <link url="http://www.last.fm/user/RJ/journal/2007/04/10/392555/">ketama</link>.
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parents: 1194
diff changeset
268 Метод гарантирует, что при добавлении сервера в группу или его удалении
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
269 на другие серверы будет перераспределено минимальное число ключей.
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
270 Применение метода для кэширующих серверов обеспечивает
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
271 больший процент попаданий в кэш.
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
272 Метод совместим с библиотекой Perl
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
273 <link url="http://search.cpan.org/perldoc?Cache%3A%3AMemcached%3A%3AFast">Cache::Memcached::Fast</link>
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
274 при значении параметра <value>ketama_points</value> равным 160.
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
275 </para>
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
276
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
277 </directive>
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
278
6cc809881694 Upstream: added the "hash" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1194
diff changeset
279
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
280 <directive name="ip_hash">
102
c76a257f3fd4 The directive name is now automatically printed in <default> and <syntax>.
Ruslan Ermilov <ru@nginx.com>
parents: 99
diff changeset
281 <syntax/>
99
1d315ef37215 The case <default/> is now language-agnostic.
Ruslan Ermilov <ru@nginx.com>
parents: 79
diff changeset
282 <default/>
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
283 <context>upstream</context>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
284
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
285 <para>
533
fb630c3c5039 Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents: 526
diff changeset
286 Задаёт для группы метод балансировки нагрузки, при котором запросы
fb630c3c5039 Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents: 526
diff changeset
287 распределяются по серверам на основе IP-адресов клиентов.
fb630c3c5039 Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents: 526
diff changeset
288 В качестве ключа для хэширования используются первые три
542
a9e6a8613534 Documented IPv6 support in ip_hash.
Ruslan Ermilov <ru@nginx.com>
parents: 533
diff changeset
289 октета IPv4-адреса клиента или IPv6-адрес клиента целиком.
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
290 Метод гарантирует, что запросы одного и того же клиента
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
291 будут всегда передаваться на один и тот же сервер.
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
292 Если же этот сервер будет считаться неработающим,
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
293 то запросы этого клиента будут передаваться на другой сервер.
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
294 С большой долей вероятности это также будет один и тот же сервер.
542
a9e6a8613534 Documented IPv6 support in ip_hash.
Ruslan Ermilov <ru@nginx.com>
parents: 533
diff changeset
295 <note>
566
f8148fc88224 Documented 1.2.2 changes.
Ruslan Ermilov <ru@nginx.com>
parents: 542
diff changeset
296 IPv6-адреса поддерживаются начиная с версий 1.3.2 и 1.2.2.
542
a9e6a8613534 Documented IPv6 support in ip_hash.
Ruslan Ermilov <ru@nginx.com>
parents: 533
diff changeset
297 </note>
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
298 </para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
299
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
300 <para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
301 Если один из серверов нужно убрать на некоторое время, то для сохранения
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
302 текущего хэширования IP-адресов клиентов этот сервер нужно пометить
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
303 параметром <literal>down</literal>.
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
304 </para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
305
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
306 <para>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
307 Пример:
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
308 <example>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
309 upstream backend {
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
310 ip_hash;
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
311
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
312 server backend1.example.com;
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
313 server backend2.example.com;
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
314 server backend3.example.com <emphasis>down</emphasis>;
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
315 server backend4.example.com;
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
316 }
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
317 </example>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
318 </para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
319
526
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents: 367
diff changeset
320 <para>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents: 367
diff changeset
321 <note>
566
f8148fc88224 Documented 1.2.2 changes.
Ruslan Ermilov <ru@nginx.com>
parents: 542
diff changeset
322 До версий 1.3.1 и 1.2.2 для серверов, использующих метод балансировки нагрузки
526
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents: 367
diff changeset
323 <literal>ip_hash</literal>, нельзя было задать вес.
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents: 367
diff changeset
324 </note>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents: 367
diff changeset
325 </para>
4f907cde0382 1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents: 367
diff changeset
326
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
327 </directive>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
328
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
329
316
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
330 <directive name="keepalive">
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
331 <syntax><value>соединения</value></syntax>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
332 <default/>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
333 <context>upstream</context>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
334 <appeared-in>1.1.4</appeared-in>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
335
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
336 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
337 Задействует кэш соединений для группы серверов.
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
338 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
339
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
340 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
341 Параметр <value>соединения</value> устанавливает максимальное число
654
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
342 неактивных постоянных соединений с серверами группы, которые будут
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
343 сохраняться в кэше каждого рабочего процесса.
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
344 При превышении этого числа наиболее давно не используемые соединения
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
345 закрываются.
316
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
346 <note>
654
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
347 Следует особо отметить, что директива <literal>keepalive</literal>
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
348 не ограничивает общее число соединений с серверами группы, которые
841118e33f41 Refined the text about cache of connections to upstream servers.
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
349 рабочие процессы nginx могут открыть.
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
350 Параметр <value>соединения</value> следует устанавливать достаточно
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
351 консервативно, чтобы серверы группы по-прежнему могли обрабатывать
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
352 новые входящие соединения.
316
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
353 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
354 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
355
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
356 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
357 Пример конфигурации группы серверов memcached с постоянными соединениями:
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
358 <example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
359 upstream memcached_backend {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
360 server 127.0.0.1:11211;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
361 server 10.0.0.2:11211;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
362
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
363 keepalive 32;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
364 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
365
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
366 server {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
367 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
368
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
369 location /memcached/ {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
370 set $memcached_key $uri;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
371 memcached_pass memcached_backend;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
372 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
373
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
374 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
375 </example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
376 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
377
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
378 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
379 Для HTTP директиву
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
380 <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: 292
diff changeset
381 следует установить в “<literal>1.1</literal>”,
367
f4033b9bc4ec - Removed unnecessary instances of unbreakable space.
Ruslan Ermilov <ru@nginx.com>
parents: 325
diff changeset
382 а поле заголовка <header>Connection</header> — очистить:
316
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
383 <example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
384 upstream http_backend {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
385 server 127.0.0.1:8080;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
386
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
387 keepalive 16;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
388 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
389
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
390 server {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
391 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
392
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
393 location /http/ {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
394 proxy_pass http://http_backend;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
395 proxy_http_version 1.1;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
396 proxy_set_header Connection "";
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
397 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
398 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
399 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
400 </example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
401 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
402
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
403 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
404 <note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
405 Хоть это и не рекомендуется, но также возможно использование постоянных
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
406 соединений с HTTP/1.0, путём передачи поля заголовка
316
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
407 <header>Connection: Keep-Alive</header> серверу группы.
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
408 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
409 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
410
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
411 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
412 Для работы постоянных соединений с FastCGI-серверами потребуется
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
413 включить директиву
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
414 <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: 292
diff changeset
415 <example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
416 upstream fastcgi_backend {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
417 server 127.0.0.1:9000;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
418
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
419 keepalive 8;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
420 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
421
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
422 server {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
423 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
424
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
425 location /fastcgi/ {
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
426 fastcgi_pass fastcgi_backend;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
427 fastcgi_keep_conn on;
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
428 ...
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
429 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
430 }
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
431 </example>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
432 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
433
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
434 <para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
435 <note>
533
fb630c3c5039 Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents: 526
diff changeset
436 При использовании методов балансировки нагрузки, отличных
316
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
437 от стандартного round-robin, следует активировать их до
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
438 директивы <literal>keepalive</literal>.
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
439 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
440
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
441 <note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
442 Протоколы SCGI и uwsgi не определяют семантику постоянных соединений.
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
443 </note>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
444 </para>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
445
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
446 </directive>
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
447
1fb1c077658b Documented the following directives: "keepalive", "proxy_http_version",
Ruslan Ermilov <ru@nginx.com>
parents: 292
diff changeset
448
1125
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
449 <directive name="least_conn">
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
450 <syntax/>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
451 <default/>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
452 <context>upstream</context>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
453 <appeared-in>1.3.1</appeared-in>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
454 <appeared-in>1.2.2</appeared-in>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
455
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
456 <para>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
457 Задаёт для группы метод балансировки нагрузки, при котором запрос
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
458 передаётся серверу с наименьшим числом активных соединений,
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
459 с учётом весов серверов.
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
460 Если подходит сразу несколько серверов, они выбираются циклически
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
461 (в режиме round-robin) с учётом их весов.
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
462 </para>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
463
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
464 </directive>
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
465
9a95b9026a16 Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents: 1124
diff changeset
466
1122
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
467 <directive name="queue">
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
468 <syntax>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
469 <value>число</value>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
470 [<literal>timeout</literal>=<value>время</value>]</syntax>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
471 <default/>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
472 <context>upstream</context>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
473 <appeared-in>1.5.12</appeared-in>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
474
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
475 <para>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
476 Если при обработке запроса невозможно сразу выбрать сервер группы
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
477 и в группе есть серверы, у которых число соединений достигло
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
478 ограничения <link id="max_conns"/>,
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
479 запрос будет помещён в очередь.
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
480 Директива задаёт максимальное число запросов, которые могут одновременно
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
481 находиться в очереди.
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
482 Если очередь переполнена
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
483 или за время, задаваемое параметром <literal>timeout</literal>,
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
484 так и не удастся выбрать сервер для передачи ему запроса,
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
485 клиенту будет возвращена ошибка.
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
486 </para>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
487
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
488 <para>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
489 По умолчанию параметр <literal>timeout</literal> равен 60 секундам.
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
490 </para>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
491
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
492 <para>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
493 <note>
1128
1594ed379f1f De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents: 1127
diff changeset
494 Эта директива доступна как часть
1594ed379f1f De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents: 1127
diff changeset
495 <commercial_version>коммерческой подписки</commercial_version>.
1122
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
496 </note>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
497 </para>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
498
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
499 </directive>
594093ef96b1 Upstream: documented the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 1121
diff changeset
500
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
501 </section>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
502
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
503
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
504 <section id="variables" name="Встроенные переменные">
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
505
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
506 <para>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
507 Модуль <literal>ngx_http_upstream_module</literal>
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
508 поддерживает следующие встроенные переменные:
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
509 <list type="tag">
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
510
1155
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
511 <tag-name id="var_upstream_addr"><var>$upstream_addr</var></tag-name>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
512 <tag-desc>
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
513 хранит IP-адрес и порт сервера или путь к UNIX-сокету.
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
514 Если при обработке запроса были сделаны обращения к нескольким серверам,
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
515 то их адреса разделяются запятой, например,
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
516 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock</literal>”.
256
c78b2d6fe261 Use another term for "redirect".
Ruslan Ermilov <ru@nginx.com>
parents: 222
diff changeset
517 Если произошло внутреннее перенаправление от одной группы серверов на другую
c78b2d6fe261 Use another term for "redirect".
Ruslan Ermilov <ru@nginx.com>
parents: 222
diff changeset
518 с помощью
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
519 <header>X-Accel-Redirect</header> или
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
520 <link doc="ngx_http_core_module.xml" id="error_page"/>,
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
521 то адреса, соответствующие разным группам серверов, разделяются двоеточием,
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
522 например,
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
523 “<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>”.
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
524 </tag-desc>
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
525
1155
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
526 <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
527 </tag-name>
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
528 <tag-desc>
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
529 хранит статус доступа к кэшу ответов (0.8.3).
1075
6c021feec587 Removed unjustified non-breakable spaces.
Ruslan Ermilov <ru@nginx.com>
parents: 1016
diff changeset
530 Статус может быть одним из “<literal>MISS</literal>”,
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
531 “<literal>BYPASS</literal>”, “<literal>EXPIRED</literal>”,
1016
2d8269d8fea8 Translated documentation on cache revalidation into russian.
Vladimir Homutov <vl@nginx.com>
parents: 966
diff changeset
532 “<literal>STALE</literal>”, “<literal>UPDATING</literal>”,
2d8269d8fea8 Translated documentation on cache revalidation into russian.
Vladimir Homutov <vl@nginx.com>
parents: 966
diff changeset
533 “<literal>REVALIDATED</literal>” или “<literal>HIT</literal>”.
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
534 </tag-desc>
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
535
1186
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
536 <tag-name id="var_upstream_cookie_"><var>$upstream_cookie_</var><value>имя</value></tag-name>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
537 <tag-desc>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
538 кука с указанным <value>именем</value>, переданная сервером группы
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
539 в поле <header>Set-Cookie</header> заголовка ответа (1.7.1).
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
540 Необходимо иметь в виду, что запоминаются поля заголовка только из ответа
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
541 последнего сервера.
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
542 </tag-desc>
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
543
1155
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
544 <tag-name id="var_upstream_response_length"><var>$upstream_response_length</var>
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
545 </tag-name>
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
546 <tag-desc>
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
547 хранит длины ответов, полученных от серверов группы (0.7.27);
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
548 длины хранятся в байтах.
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
549 Длины нескольких ответов разделяются запятыми и двоеточиями
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
550 подобно адресам в переменной <var>$upstream_addr</var>.
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
551 </tag-desc>
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
552
1155
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
553 <tag-name id="var_upstream_response_time"><var>$upstream_response_time</var>
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
554 </tag-name>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
555 <tag-desc>
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
556 хранит времена ответов, полученных от серверов группы;
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
557 времена хранятся в секундах с точностью до миллисекунд.
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
558 Времена нескольких ответов разделяются запятыми и двоеточиями
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
559 подобно адресам в переменной <var>$upstream_addr</var>.
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
560 </tag-desc>
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
561
1155
07402a11fd8d Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents: 1128
diff changeset
562 <tag-name id="var_upstream_status"><var>$upstream_status</var></tag-name>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
563 <tag-desc>
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
564 хранит коды ответов, полученных от серверов группы.
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
565 Коды нескольких ответов разделяются запятыми и двоеточиями
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
566 подобно адресам в переменной <var>$upstream_addr</var>.
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
567 </tag-desc>
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
568
1186
8125bec5c7a1 Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents: 1181
diff changeset
569 <tag-name id="var_upstream_http_"><var>$upstream_http_</var><value>имя</value></tag-name>
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
570 <tag-desc>
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
571 хранят поля заголовка ответа сервера.
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
572 Например, поле заголовка ответа <header>Server</header>
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
573 доступно в переменной <var>$upstream_http_server</var>.
731
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
574 Правила преобразования имён полей заголовка ответа в имена переменных
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
575 такие же, как для переменных с префиксом
f62328124e5b Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents: 654
diff changeset
576 “<link doc="ngx_http_core_module.xml" id="variables">$http_</link>”.
966
95c3c3bbf1ce Text review.
Egor Nikitin <yegor.nikitin@gmail.com>
parents: 942
diff changeset
577 Необходимо иметь в виду, что запоминаются поля заголовка только из ответа
292
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
578 последнего сервера.
7bc830cc79bb Revision.
Ruslan Ermilov <ru@nginx.com>
parents: 280
diff changeset
579 </tag-desc>
76
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
580
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
581 </list>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
582 </para>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
583
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
584 </section>
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
585
4a4caa566120 Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff changeset
586 </module>