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annotate xml/ru/docs/http/ngx_http_upstream_conf_module.xml @ 1659:680cbf783efe

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Fixed some misuses of "value".
author Ruslan Ermilov <ru@nginx.com>
date Mon, 29 Feb 2016 14:40:15 +0300
parents d3c1a4e8c1fe
children 57c3f36b3b6a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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="2">
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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 </para>
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26
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27 <para>
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28 <note>
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29 Модуль доступен как часть
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30 <commercial_version>коммерческой подписки</commercial_version>.
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31 </note>
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32 </para>
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33
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34 </section>
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35
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36
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37 <section id="example" name="Пример конфигурации">
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38
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39 <para>
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40 <example>
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41 upstream backend {
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42 zone upstream_backend 64k;
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43
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44 ...
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45 }
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46
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47 server {
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48 location /upstream_conf {
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49 <emphasis>upstream_conf</emphasis>;
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50 allow 127.0.0.1;
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51 deny all;
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52 }
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53 }
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54 </example>
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55 </para>
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56
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57 </section>
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58
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59
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60 <section id="directives" name="Директивы">
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61
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62 <directive name="upstream_conf">
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63 <syntax/>
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64 <default/>
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65 <context>location</context>
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66
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67 <para>
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68 Активирует HTTP-интерфейс для настройки групп серверов в содержащем location.
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69 Доступ в location следует
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70 <link doc="ngx_http_core_module.xml" id="satisfy">ограничить</link>.
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71 </para>
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72
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73 <para>
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74 С помощью команд настройки можно:
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75 <list type="bullet">
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76
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77 <listitem>просматривать конфигурацию группы;</listitem>
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78
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79 <listitem>
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80 просматривать или изменять конфигурацию, а также
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81 удалять серверы;
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82 </listitem>
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83
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84 <listitem>добавлять новые серверы.</listitem>
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85
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86 </list>
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87 <note>
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88 Поскольку адреса в группе не обязаны быть уникальными,
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89 обращение к отдельным серверам в группе осуществляется по их идентификаторам.
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90 Идентификаторы назначаются автоматически и показываются при добавлении сервера
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91 или просмотре конфигурации группы.
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92 </note>
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93 </para>
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94
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95 <para>
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96 Команда настройки состоит из параметров, передаваемых в аргументах запроса,
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97 например:
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98 <example>
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99 http://127.0.0.1/upstream_conf?upstream=backend
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100 </example>
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101 </para>
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102
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103 <para>
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104 Поддерживаются следующие параметры:
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105
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106 <list type="tag" compact="no">
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107
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108 <tag-name>
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109 <literal>stream=</literal></tag-name>
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110 <tag-desc>
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111 Выбирает группу серверов
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112 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>.
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113 Если параметр не задан, будет выбрана группа серверов
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114 <link doc="ngx_http_upstream_module.xml">http</link>.
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115 </tag-desc>
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116
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117 <tag-name>
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118 <literal>upstream=</literal><value>имя</value></tag-name>
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119 <tag-desc>
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120 Выбирает группу серверов для работы.
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121 Параметр является обязательным.
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122 </tag-desc>
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123
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124 <tag-name>
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125 <literal>id=</literal><value>число</value></tag-name>
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126 <tag-desc>
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127 Выбирает сервер для просмотра, изменения или удаления.
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128 </tag-desc>
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129
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130 <tag-name>
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131 <literal>remove=</literal></tag-name>
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132 <tag-desc>
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133 Удаляет сервер из группы.
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134 </tag-desc>
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135
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136 <tag-name>
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137 <literal>add=</literal></tag-name>
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138 <tag-desc>
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139 Добавляет новый сервер в группу.
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140 </tag-desc>
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141
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142 <tag-name>
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143 <literal>backup=</literal></tag-name>
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144 <tag-desc>
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145 Необходим для добавления запасного сервера.
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146 <note>
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147 До версии 1.7.2 параметр <literal>backup=</literal> требовался
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148 также для просмотра, изменения или удаления существующих запасных серверов.
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149 </note>
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150 </tag-desc>
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151
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152 <tag-name>
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153 <literal>server=</literal><value>адрес</value></tag-name>
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154 <tag-desc>
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155 То же, что и параметр “<literal>адрес</literal>” сервера группы
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156 <link doc="ngx_http_upstream_module.xml" id="server">http</link>
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157 или
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158 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>.
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159 <para>
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160 При добавлении сервер можно задать в виде доменного имени.
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161 В этом случае любые изменения IP-адресов, соответствующих доменному имени
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162 сервера, отслеживаются и автоматически применяются к конфигурации группы
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163 без необходимости перезапуска nginx (1.7.2).
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164 Для этого в блоке
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165 <link doc="ngx_http_core_module.xml" id="resolver">http</link>
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166 или
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167 <link doc="../stream/ngx_stream_core_module.xml" id="resolver">stream</link>
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168 должна быть задана директива “<literal>resolver</literal>”.
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169 См. также параметр “<literal>resolve</literal>” сервера группы
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170 <link doc="ngx_http_upstream_module.xml" id="resolve">http</link>
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171 или
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172 <link doc="../stream/ngx_stream_upstream_module.xml" id="resolve">stream</link>.
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173 </para>
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174 </tag-desc>
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175
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176 <tag-name>
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177 <literal>weight=</literal><value>число</value></tag-name>
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178 <tag-desc>
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179 То же, что и параметр “<literal>weight</literal>” сервера группы
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180 <link doc="ngx_http_upstream_module.xml" id="weight">http</link>
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181 или
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182 <link doc="../stream/ngx_stream_upstream_module.xml" id="weight">stream</link>.
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183 </tag-desc>
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184
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185 <tag-name>
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186 <literal>max_conns=</literal><value>число</value></tag-name>
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187 <tag-desc>
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188 То же, что и параметр “<literal>max_conns</literal>” сервера группы
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189 <link doc="ngx_http_upstream_module.xml" id="max_conns">http</link>
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190 или
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191 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_conns">stream</link>.
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192 </tag-desc>
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193
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194 <tag-name>
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195 <literal>max_fails=</literal><value>число</value></tag-name>
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196 <tag-desc>
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197 То же, что и параметр “<literal>max_fails</literal>” сервера группы
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198 <link doc="ngx_http_upstream_module.xml" id="max_fails">http</link>
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199 или
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200 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_fails">stream</link>.
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201 </tag-desc>
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202
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203 <tag-name>
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204 <literal>fail_timeout=</literal><value>время</value></tag-name>
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205 <tag-desc>
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206 То же, что и параметр “<literal>fail_timeout</literal>” сервера группы
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207 <link doc="ngx_http_upstream_module.xml" id="fail_timeout">http</link>
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208 или
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209 <link doc="../stream/ngx_stream_upstream_module.xml" id="fail_timeout">stream</link>.
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210 </tag-desc>
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211
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212 <tag-name>
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213 <literal>slow_start=</literal><value>время</value></tag-name>
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214 <tag-desc>
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215 То же, что и параметр “<literal>slow_start</literal>” сервера группы
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216 <link doc="ngx_http_upstream_module.xml" id="slow_start">http</link>
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217 или
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218 <link doc="../stream/ngx_stream_upstream_module.xml" id="slow_start">stream</link>.
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219 </tag-desc>
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220
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221 <tag-name>
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222 <literal>down=</literal></tag-name>
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223 <tag-desc>
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224 То же, что и параметр “<literal>down</literal>” сервера группы
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225 <link doc="ngx_http_upstream_module.xml" id="down">http</link>
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226 или
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227 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>.
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228 </tag-desc>
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229
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230 <tag-name id="drain"><literal>drain=</literal></tag-name>
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231 <tag-desc>
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232 Переводит сервер группы серверов
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233 <link doc="ngx_http_upstream_module.xml">http</link>
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234 в режим “draining” (1.7.5).
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235 В этом режиме на сервер будут проксироваться только
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236 <link doc="ngx_http_upstream_module.xml" id="sticky">привязанные</link>
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237 к нему запросы.
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238 </tag-desc>
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239
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240 <tag-name>
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241 <literal>up=</literal></tag-name>
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242 <tag-desc>
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243 Параметр, обратный по значению параметру “<literal>down</literal>” сервера группы
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244 <link doc="ngx_http_upstream_module.xml" id="down">http</link>
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245 или
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246 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>.
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247 </tag-desc>
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248
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249 <tag-name>
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250 <literal>route=</literal><value>строка</value></tag-name>
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251 <tag-desc>
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252 То же, что и параметр “<literal>route</literal>” сервера группы
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253 <link doc="ngx_http_upstream_module.xml" id="route">http</link>.
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254 </tag-desc>
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255
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256 </list>
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257
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258 Первые три параметра выбирают объект.
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259 Объектом может быть либо группа серверов http или stream,
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260 либо отдельный сервер.
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261 Если остальные параметры не указаны, то показывается конфигурация выбранной
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262 группы или сервера.
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263 </para>
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264
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265 <para>
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266 Например, команда для просмотра конфигурации всей группы
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267 выглядит следующим образом:
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268 <example>
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269 http://127.0.0.1/upstream_conf?upstream=backend
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270 </example>
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271
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272 Для просмотра конфигурации отдельного сервера следует указать его идентификатор:
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273 <example>
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274 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42
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275 </example>
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276 </para>
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277
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278 <para>
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279 Для добавления нового сервера в группу
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280 следует указать его адрес в параметре “<literal>server=</literal>”.
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281 Если остальные параметры не указаны, то при добавлении сервера
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282 их значения будут установлены по умолчанию (см. директиву
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283 “<literal>server</literal>” для
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284 <link doc="ngx_http_upstream_module.xml" id="server">http</link>
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285 или
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286 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>).
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287 </para>
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288
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289 <para>
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290 Например, команда для добавления нового основного сервера в группу
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291 выглядит следующим образом:
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292 <example>
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293 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;server=127.0.0.1:8080
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294 </example>
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295
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296 Добавление нового запасного сервера происходит следующим образом:
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297 <example>
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298 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;backup=&amp;server=127.0.0.1:8080
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299 </example>
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300
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301 Добавление нового основного сервера с нестандартными
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302 значениями параметров и с пометкой его как постоянно недоступного
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303 (“<literal>down</literal>”) происходит 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&amp;weight=2&amp;down=
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306 </example>
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307
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308 Для удаления сервера следует указать его идентификатор:
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309 <example>
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310 http://127.0.0.1/upstream_conf?remove=&amp;upstream=backend&amp;id=42
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311 </example>
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312
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313 Пометка существующего сервера как постоянно недоступного
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314 (“<literal>down</literal>”) происходит следующим образом:
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315 <example>
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316 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;down=
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317 </example>
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318
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319 Изменение адреса существующего сервера происходит следующим образом:
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320 <example>
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321 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;server=192.0.2.3:8123
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322 </example>
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323
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324 Изменение других параметров существующего сервера происходит следующим образом:
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325 <example>
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326 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;max_fails=3&amp;weight=4
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327 </example>
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328
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329 Вышеприведённые примеры актуальны для группы серверов
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330 <link doc="ngx_http_upstream_module.xml">http</link>.
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331 Аналогичные примеры для группы серверов
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332 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>
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333 требуют указания параметра “<literal>stream=</literal>”.
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334 </para>
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335
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336 </directive>
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337
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338 </section>
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339
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340 </module>