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annotate xml/ru/docs/http/ngx_http_upstream_conf_module.xml @ 2096:8d3b9bda10db

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Corrected API version in upstream_conf.
author Yaroslav Zhuravlev <yar@nginx.com>
date Wed, 17 Jan 2018 17:02:05 +0300
parents 5c55b7054b58
children 283b1e67eaa6
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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) Nginx, Inc.
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5 -->
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6
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7 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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8
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9 <module name="Модуль ngx_http_upstream_conf_module"
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10 link="/ru/docs/http/ngx_http_upstream_conf_module.html"
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11 lang="ru"
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12 rev="5">
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13
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14 <section id="summary">
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15
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16 <para>
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17 Модуль <literal>ngx_http_upstream_conf_module</literal>
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18 позволяет оперативно настраивать группы серверов
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19 при помощи простого HTTP-интерфейса без необходимости перезапуска nginx.
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20 Группа серверов
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21 <link doc="ngx_http_upstream_module.xml" id="zone">http</link>
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22 или
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23 <link doc="../stream/ngx_stream_upstream_module.xml" id="zone">stream</link>
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24 должна находиться в разделяемой памяти.
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25 <note>
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26 Этот модуль был заменён модулем
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27 <link doc="ngx_http_api_module.xml">ngx_http_api_module</link>
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28 в версии 1.13.3.
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29 </note>
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30 <note>
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31 Модуль доступен как часть
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32 <commercial_version>коммерческой подписки</commercial_version>.
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33 </note>
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34 </para>
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35
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36 </section>
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37
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38
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39 <section id="example" name="Пример конфигурации">
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40
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41 <para>
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42 <example>
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43 upstream backend {
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44 zone upstream_backend 64k;
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45
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46 ...
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47 }
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48
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49 server {
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50 location /upstream_conf {
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51 <emphasis>upstream_conf</emphasis>;
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52 allow 127.0.0.1;
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53 deny all;
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54 }
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55 }
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56 </example>
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57 </para>
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58
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59 </section>
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60
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61
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62 <section id="directives" name="Директивы">
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63
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64 <directive name="upstream_conf">
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65 <syntax/>
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66 <default/>
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67 <context>location</context>
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68
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69 <para>
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70 Активирует HTTP-интерфейс для настройки групп серверов в содержащем location.
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71 Доступ в location следует
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72 <link doc="ngx_http_core_module.xml" id="satisfy">ограничить</link>.
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73 </para>
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74
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75 <para>
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76 С помощью команд настройки можно:
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77 <list type="bullet">
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78
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79 <listitem>просматривать конфигурацию группы;</listitem>
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80
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81 <listitem>
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82 просматривать или изменять конфигурацию, а также
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83 удалять серверы;
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84 </listitem>
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85
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86 <listitem>добавлять новые серверы.</listitem>
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87
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88 </list>
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89 <note>
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90 Поскольку адреса в группе не обязаны быть уникальными,
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91 обращение к отдельным серверам в группе осуществляется по их идентификаторам.
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92 Идентификаторы назначаются автоматически и показываются при добавлении сервера
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93 или просмотре конфигурации группы.
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94 </note>
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95 </para>
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96
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97 <para>
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98 Команда настройки состоит из параметров, передаваемых в аргументах запроса,
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99 например:
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100 <example>
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101 http://127.0.0.1/upstream_conf?upstream=backend
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102 </example>
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103 </para>
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104
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105 <para>
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106 Поддерживаются следующие параметры:
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107
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108 <list type="tag" compact="no">
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109
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110 <tag-name>
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111 <literal>stream=</literal></tag-name>
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112 <tag-desc>
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113 Выбирает группу серверов
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114 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>.
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115 Если параметр не задан, будет выбрана группа серверов
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116 <link doc="ngx_http_upstream_module.xml">http</link>.
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117 </tag-desc>
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118
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119 <tag-name>
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120 <literal>upstream=</literal><value>имя</value></tag-name>
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121 <tag-desc>
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122 Выбирает группу серверов для работы.
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123 Параметр является обязательным.
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124 </tag-desc>
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125
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126 <tag-name>
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127 <literal>id=</literal><value>число</value></tag-name>
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128 <tag-desc>
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129 Выбирает сервер для просмотра, изменения или удаления.
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130 </tag-desc>
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131
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132 <tag-name>
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133 <literal>remove=</literal></tag-name>
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134 <tag-desc>
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135 Удаляет сервер из группы.
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136 </tag-desc>
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137
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138 <tag-name>
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139 <literal>add=</literal></tag-name>
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140 <tag-desc>
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141 Добавляет новый сервер в группу.
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142 </tag-desc>
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143
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144 <tag-name>
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145 <literal>backup=</literal></tag-name>
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146 <tag-desc>
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147 Необходим для добавления запасного сервера.
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148 <note>
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149 До версии 1.7.2 параметр <literal>backup=</literal> требовался
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150 также для просмотра, изменения или удаления существующих запасных серверов.
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151 </note>
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152 </tag-desc>
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153
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154 <tag-name>
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155 <literal>server=</literal><value>адрес</value></tag-name>
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156 <tag-desc>
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157 То же, что и параметр “<literal>адрес</literal>” сервера группы
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158 <link doc="ngx_http_upstream_module.xml" id="server">http</link>
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159 или
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160 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>.
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161 <para>
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162 При добавлении сервер можно задать в виде доменного имени.
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163 В этом случае любые изменения IP-адресов, соответствующих доменному имени
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164 сервера, отслеживаются и автоматически применяются к конфигурации группы
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165 без необходимости перезапуска nginx (1.7.2).
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166 Для этого в блоке
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167 <link doc="ngx_http_core_module.xml" id="resolver">http</link>
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168 или
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169 <link doc="../stream/ngx_stream_core_module.xml" id="resolver">stream</link>
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170 должна быть задана директива “<literal>resolver</literal>”.
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171 См. также параметр “<literal>resolve</literal>” сервера группы
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172 <link doc="ngx_http_upstream_module.xml" id="resolve">http</link>
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173 или
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174 <link doc="../stream/ngx_stream_upstream_module.xml" id="resolve">stream</link>.
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175 </para>
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176 </tag-desc>
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177
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178 <tag-name>
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179 <literal>service=</literal><value>имя</value></tag-name>
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180 <tag-desc>
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181 То же, что и параметр “<literal>service</literal>” сервера группы
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182 <link doc="ngx_http_upstream_module.xml" id="service">http</link>
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183 или
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184 <link doc="../stream/ngx_stream_upstream_module.xml" id="service">stream</link>
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185 (1.9.13).
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186 </tag-desc>
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187
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188 <tag-name>
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189 <literal>weight=</literal><value>число</value></tag-name>
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190 <tag-desc>
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191 То же, что и параметр “<literal>weight</literal>” сервера группы
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192 <link doc="ngx_http_upstream_module.xml" id="weight">http</link>
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193 или
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194 <link doc="../stream/ngx_stream_upstream_module.xml" id="weight">stream</link>.
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195 </tag-desc>
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196
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197 <tag-name>
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198 <literal>max_conns=</literal><value>число</value></tag-name>
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199 <tag-desc>
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200 То же, что и параметр “<literal>max_conns</literal>” сервера группы
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201 <link doc="ngx_http_upstream_module.xml" id="max_conns">http</link>
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202 или
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203 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_conns">stream</link>.
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204 </tag-desc>
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205
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206 <tag-name>
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207 <literal>max_fails=</literal><value>число</value></tag-name>
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208 <tag-desc>
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209 То же, что и параметр “<literal>max_fails</literal>” сервера группы
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210 <link doc="ngx_http_upstream_module.xml" id="max_fails">http</link>
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211 или
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212 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_fails">stream</link>.
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213 </tag-desc>
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214
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215 <tag-name>
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216 <literal>fail_timeout=</literal><value>время</value></tag-name>
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217 <tag-desc>
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218 То же, что и параметр “<literal>fail_timeout</literal>” сервера группы
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219 <link doc="ngx_http_upstream_module.xml" id="fail_timeout">http</link>
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220 или
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221 <link doc="../stream/ngx_stream_upstream_module.xml" id="fail_timeout">stream</link>.
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222 </tag-desc>
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223
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224 <tag-name>
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225 <literal>slow_start=</literal><value>время</value></tag-name>
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226 <tag-desc>
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227 То же, что и параметр “<literal>slow_start</literal>” сервера группы
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228 <link doc="ngx_http_upstream_module.xml" id="slow_start">http</link>
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229 или
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230 <link doc="../stream/ngx_stream_upstream_module.xml" id="slow_start">stream</link>.
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231 </tag-desc>
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232
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233 <tag-name>
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234 <literal>down=</literal></tag-name>
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235 <tag-desc>
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236 То же, что и параметр “<literal>down</literal>” сервера группы
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237 <link doc="ngx_http_upstream_module.xml" id="down">http</link>
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238 или
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239 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>.
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240 </tag-desc>
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241
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242 <tag-name id="drain"><literal>drain=</literal></tag-name>
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243 <tag-desc>
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244 Переводит сервер группы серверов
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245 <link doc="ngx_http_upstream_module.xml">http</link>
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246 в режим “draining” (1.7.5).
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247 В этом режиме на сервер будут проксироваться только
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248 <link doc="ngx_http_upstream_module.xml" id="sticky">привязанные</link>
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249 к нему запросы.
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250 </tag-desc>
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251
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252 <tag-name>
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253 <literal>up=</literal></tag-name>
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254 <tag-desc>
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255 Параметр, обратный по значению параметру “<literal>down</literal>” сервера группы
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256 <link doc="ngx_http_upstream_module.xml" id="down">http</link>
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257 или
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258 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>.
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259 </tag-desc>
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260
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261 <tag-name>
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262 <literal>route=</literal><value>строка</value></tag-name>
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263 <tag-desc>
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264 То же, что и параметр “<literal>route</literal>” сервера группы
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265 <link doc="ngx_http_upstream_module.xml" id="route">http</link>.
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266 </tag-desc>
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267
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268 </list>
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269
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270 Первые три параметра выбирают объект.
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271 Объектом может быть либо группа серверов http или stream,
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272 либо отдельный сервер.
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273 Если остальные параметры не указаны, то показывается конфигурация выбранной
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274 группы или сервера.
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275 </para>
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276
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277 <para>
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278 Например, команда для просмотра конфигурации всей группы
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279 выглядит следующим образом:
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280 <example>
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281 http://127.0.0.1/upstream_conf?upstream=backend
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282 </example>
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283
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284 Для просмотра конфигурации отдельного сервера следует указать его идентификатор:
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285 <example>
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286 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42
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287 </example>
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288 </para>
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289
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290 <para>
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291 Для добавления нового сервера в группу
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292 следует указать его адрес в параметре “<literal>server=</literal>”.
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293 Если остальные параметры не указаны, то при добавлении сервера
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294 их значения будут установлены по умолчанию (см. директиву
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295 “<literal>server</literal>” для
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296 <link doc="ngx_http_upstream_module.xml" id="server">http</link>
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297 или
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298 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>).
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299 </para>
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300
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301 <para>
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302 Например, команда для добавления нового основного сервера в группу
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303 выглядит следующим образом:
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304 <example>
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305 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;server=127.0.0.1:8080
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306 </example>
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307
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308 Добавление нового запасного сервера происходит следующим образом:
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309 <example>
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310 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;backup=&amp;server=127.0.0.1:8080
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311 </example>
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312
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313 Добавление нового основного сервера с нестандартными
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314 значениями параметров и с пометкой его как постоянно недоступного
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315 (“<literal>down</literal>”) происходит следующим образом:
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316 <example>
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317 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;server=127.0.0.1:8080&amp;weight=2&amp;down=
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318 </example>
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319
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320 Для удаления сервера следует указать его идентификатор:
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321 <example>
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322 http://127.0.0.1/upstream_conf?remove=&amp;upstream=backend&amp;id=42
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323 </example>
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324
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325 Пометка существующего сервера как постоянно недоступного
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326 (“<literal>down</literal>”) происходит следующим образом:
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327 <example>
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328 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;down=
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329 </example>
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330
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331 Изменение адреса существующего сервера происходит следующим образом:
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332 <example>
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333 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;server=192.0.2.3:8123
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334 </example>
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335
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336 Изменение других параметров существующего сервера происходит следующим образом:
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337 <example>
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338 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;max_fails=3&amp;weight=4
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339 </example>
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340
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341 Вышеприведённые примеры актуальны для группы серверов
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342 <link doc="ngx_http_upstream_module.xml">http</link>.
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343 Аналогичные примеры для группы серверов
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344 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>
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345 требуют указания параметра “<literal>stream=</literal>”.
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346 </para>
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347
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348 </directive>
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349
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350 </section>
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351
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352 </module>