Mercurial > hg > nginx-site
annotate xml/ru/docs/stream/ngx_stream_upstream_module.xml @ 2469:98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Mon, 02 Dec 2019 13:23:05 +0300 |
parents | a1f61586779b |
children | 504536999408 |
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) 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_stream_upstream_module" |
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10 link="/ru/docs/stream/ngx_stream_upstream_module.html" |
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11 lang="ru" |
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12 rev="38"> |
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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_stream_upstream_module</literal> (1.9.0) |
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18 позволяет описывать группы серверов, |
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19 которые могут использоваться в директиве |
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20 <link doc="ngx_stream_proxy_module.xml" id="proxy_pass"/>. |
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21 </para> |
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22 |
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23 </section> |
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24 |
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25 |
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26 <section id="example" name="Пример конфигурации"> |
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27 |
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28 <para> |
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29 <example> |
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30 upstream <emphasis>backend</emphasis> { |
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31 hash $remote_addr consistent; |
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32 |
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33 server backend1.example.com:12345 weight=5; |
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34 server backend2.example.com:12345; |
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35 server unix:/tmp/backend3; |
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36 |
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37 server backup1.example.com:12345 backup; |
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38 server backup2.example.com:12345 backup; |
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39 } |
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40 |
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41 server { |
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42 listen 12346; |
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43 proxy_pass <emphasis>backend</emphasis>; |
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44 } |
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45 </example> |
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46 </para> |
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47 |
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48 <para> |
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49 Динамически настраиваемая группа |
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50 с периодическими |
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51 <link doc="ngx_stream_upstream_hc_module.xml">проверками работоспособности</link> |
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52 доступна как часть |
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53 <commercial_version>коммерческой подписки</commercial_version>: |
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54 <example> |
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55 resolver 10.0.0.1; |
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56 |
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57 upstream <emphasis>dynamic</emphasis> { |
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58 zone upstream_dynamic 64k; |
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59 |
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60 server backend1.example.com:12345 weight=5; |
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61 server backend2.example.com:12345 fail_timeout=5s slow_start=30s; |
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62 server 192.0.2.1:12345 max_fails=3; |
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63 server backend3.example.com:12345 resolve; |
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64 server backend4.example.com service=http resolve; |
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65 |
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66 server backup1.example.com:12345 backup; |
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67 server backup2.example.com:12345 backup; |
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68 } |
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69 |
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70 server { |
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71 listen 12346; |
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72 proxy_pass <emphasis>dynamic</emphasis>; |
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73 health_check; |
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74 } |
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75 </example> |
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76 </para> |
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77 |
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78 </section> |
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79 |
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80 |
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81 <section id="directives" name="Директивы"> |
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82 |
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83 <directive name="upstream"> |
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84 <syntax block="yes"><value>название</value></syntax> |
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85 <default/> |
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86 <context>stream</context> |
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87 |
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88 <para> |
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89 Описывает группу серверов. |
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90 Серверы могут слушать на разных портах. |
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91 Кроме того, можно одновременно использовать серверы, |
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92 слушающие на TCP- и UNIX-сокетах. |
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93 </para> |
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94 |
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95 <para> |
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96 Пример: |
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97 <example> |
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98 upstream backend { |
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99 server backend1.example.com:12345 weight=5; |
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100 server 127.0.0.1:12345 max_fails=3 fail_timeout=30s; |
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101 server unix:/tmp/backend2; |
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102 server backend3.example.com:12345 resolve; |
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103 |
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104 server backup1.example.com:12345 backup; |
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105 } |
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106 </example> |
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107 </para> |
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108 |
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109 <para> |
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110 По умолчанию соединения распределяются по серверам циклически |
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111 (в режиме round-robin) с учётом весов серверов. |
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112 В вышеприведённом примере каждые 7 соединений будут распределены так: |
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113 5 соединений на <literal>backend1.example.com:12345</literal> |
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114 и по одному соединению на второй и третий серверы. |
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115 Если при попытке работы с сервером происходит ошибка, то соединение |
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116 передаётся следующему серверу, и так далее до тех пор, пока не будут опробованы |
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117 все работающие серверы. |
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118 Если связь с серверами не удалась, соединение будет закрыто. |
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119 </para> |
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120 |
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121 </directive> |
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122 |
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123 |
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124 <directive name="server"> |
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125 <syntax><value>адрес</value> [<value>параметры</value>]</syntax> |
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126 <default/> |
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127 <context>upstream</context> |
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128 |
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129 <para> |
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130 Задаёт <value>адрес</value> и другие <value>параметры</value> |
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131 сервера. |
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132 Адрес может быть указан в виде доменного имени или IP-адреса, |
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133 и обязательного порта, или в виде пути UNIX-сокета, который |
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134 указывается после префикса “<literal>unix:</literal>”. |
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135 Доменное имя, которому соответствует несколько IP-адресов, |
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136 задаёт сразу несколько серверов. |
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137 </para> |
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138 |
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139 <para> |
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140 Могут быть заданы следующие параметры: |
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141 <list type="tag"> |
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142 |
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143 <tag-name id="weight"> |
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144 <literal>weight</literal>=<value>число</value> |
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145 </tag-name> |
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146 <tag-desc> |
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147 задаёт вес сервера, по умолчанию 1. |
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148 </tag-desc> |
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149 |
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150 <tag-name id="max_conns"> |
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151 <literal>max_conns</literal>=<value>число</value> |
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152 </tag-name> |
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153 <tag-desc> |
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154 ограничивает максимальное <value>число</value> одновременных |
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155 соединений к проксируемому серверу (1.11.5). |
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156 Значение по умолчанию равно 0 и означает, что ограничения нет. |
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157 Если группа не находится в <link id="zone">зоне разделяемой памяти</link>, |
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158 то ограничение работает отдельно для каждого рабочего процесса. |
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159 <note> |
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160 До версии 1.11.5 этот параметр был доступен как часть |
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161 <commercial_version>коммерческой подписки</commercial_version>. |
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162 </note> |
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163 </tag-desc> |
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164 |
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165 <tag-name id="max_fails"> |
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166 <literal>max_fails</literal>=<value>число</value> |
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167 </tag-name> |
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168 <tag-desc> |
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169 задаёт число неудачных попыток работы с сервером, которые должны произойти |
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170 в течение времени, заданного параметром <literal>fail_timeout</literal>, |
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171 чтобы сервер считался недоступным на период времени, также заданный |
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172 параметром <literal>fail_timeout</literal>. |
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173 По умолчанию число попыток устанавливается равным 1. |
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174 Нулевое значение отключает учёт попыток. |
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175 В данном случае неудачной попыткой считается ошибка или таймаут |
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176 при установке соединения с сервером. |
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177 </tag-desc> |
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178 |
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179 <tag-name id="fail_timeout"> |
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180 <literal>fail_timeout</literal>=<value>время</value> |
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181 </tag-name> |
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182 <tag-desc> |
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183 задаёт |
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184 <list type="bullet"> |
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185 |
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186 <listitem> |
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187 время, в течение которого должно произойти заданное число неудачных |
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188 попыток работы с сервером для того, чтобы сервер считался недоступным; |
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189 </listitem> |
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190 |
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191 <listitem> |
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192 и время, в течение которого сервер будет считаться недоступным. |
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193 </listitem> |
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194 |
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195 </list> |
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196 По умолчанию параметр равен 10 секундам. |
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197 </tag-desc> |
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198 |
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199 <tag-name id="backup"> |
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200 <literal>backup</literal> |
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201 </tag-name> |
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202 <tag-desc> |
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203 помечает сервер как запасной сервер. |
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204 На него будут передаваться соединения в случае, |
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205 если не работают основные серверы. |
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206 <note> |
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207 Параметр нельзя использовать совместно с |
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208 методами балансировки нагрузки <link id="hash"/> и <link id="random"/>. |
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209 </note> |
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210 </tag-desc> |
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211 |
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212 <tag-name id="down"> |
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213 <literal>down</literal> |
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214 </tag-name> |
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215 <tag-desc> |
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216 помечает сервер как постоянно недоступный. |
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217 </tag-desc> |
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218 |
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219 </list> |
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220 </para> |
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221 |
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222 <para> |
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223 Кроме того, |
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224 следующие параметры доступны как часть |
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225 <commercial_version>коммерческой подписки</commercial_version>: |
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226 <list type="tag"> |
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227 |
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228 <tag-name id="resolve"> |
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229 <literal>resolve</literal> |
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230 </tag-name> |
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231 <tag-desc> |
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232 отслеживает изменения IP-адресов, соответствующих доменному имени сервера, |
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233 и автоматически изменяет конфигурацию группы |
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234 без необходимости перезапуска nginx. |
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235 Группа должна находиться в <link id="zone">зоне разделяемой памяти</link>. |
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236 <para> |
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237 Для работы этого параметра |
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238 директива <link doc="ngx_stream_core_module.xml" id="resolver"/> |
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239 должна быть задана в блоке |
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240 <link doc="ngx_stream_core_module.xml" id="stream"/>. |
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241 Пример: |
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242 <example> |
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243 stream { |
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244 resolver 10.0.0.1; |
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245 |
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246 upstream u { |
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247 zone ...; |
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248 ... |
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249 server example.com:12345 resolve; |
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250 } |
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251 } |
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252 </example> |
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253 </para> |
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254 </tag-desc> |
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255 |
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256 <tag-name id="service"> |
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257 <literal>service</literal>=<value>имя</value> |
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258 </tag-name> |
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259 <tag-desc> |
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260 включает преобразование |
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261 <link url="https://tools.ietf.org/html/rfc2782">SRV</link>-записей |
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262 DNS и задаёт <value>имя</value> сервиса (1.9.13). |
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263 Для работы параметра необходимо указать |
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264 параметр <link id="resolve"/> для сервера |
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265 и не указывать порт сервера. |
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266 <para> |
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267 Если имя сервиса не содержит точку (“<literal>.</literal>”), то |
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268 имя составляется в соответствии с |
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269 <link url="https://tools.ietf.org/html/rfc2782">RFC</link> |
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270 и в префикс службы добавляется протокол TCP. |
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271 Например, для получения |
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272 SRV-записи <literal>_http._tcp.backend.example.com</literal> |
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273 необходимо указать директиву: |
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274 <example> |
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275 server backend.example.com service=http resolve; |
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276 </example> |
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277 Если имя сервиса содержит одну и более точек, то имя составляется |
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278 при помощи соединения префикса службы и имени сервера. |
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279 Например, для получения SRV-записей |
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280 <literal>_http._tcp.backend.example.com</literal> |
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281 и <literal>server1.backend.example.com</literal> |
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282 необходимо указать директивы: |
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283 <example> |
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284 server backend.example.com service=_http._tcp resolve; |
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285 server example.com service=server1.backend resolve; |
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286 </example> |
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287 </para> |
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288 |
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289 <para> |
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290 SRV-записи с наивысшим приоритетом |
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291 (записи с одинаковым наименьшим значением приоритета) |
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292 преобразуются в основные серверы, |
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293 остальные SRV-записи преобразуются в запасные серверы. |
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294 Если в конфигурации сервера указан параметр <link id="backup"/>, |
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295 высокоприоритетные SRV-записи преобразуются в запасные серверы, |
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296 остальные SRV-записи игнорируются. |
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297 </para> |
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298 </tag-desc> |
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299 |
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300 <tag-name id="slow_start"> |
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301 <literal>slow_start</literal>=<value>время</value> |
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302 </tag-name> |
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303 <tag-desc> |
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304 задаёт <value>время</value>, в течение которого вес сервера |
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305 восстановится от нуля до своего номинального значения в ситуации, когда |
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306 неработоспособный (unhealthy) сервер вновь становится работоспособным |
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307 (<link doc="ngx_stream_upstream_hc_module.xml" id="health_check">healthy</link>) |
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308 или когда сервер становится доступным по прошествии времени, |
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309 в течение которого он считался <link id="fail_timeout">недоступным</link>. |
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310 Значение по умолчанию равно нулю и означает, что медленный старт выключен. |
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311 <note> |
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312 Параметр нельзя использовать совместно с |
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313 методами балансировки нагрузки <link id="hash"/> и <link id="random"/>. |
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314 </note> |
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315 </tag-desc> |
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316 |
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317 </list> |
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318 </para> |
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319 |
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320 <para> |
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321 <note> |
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322 Если в группе только один сервер, параметры <literal>max_fails</literal>, |
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323 <literal>fail_timeout</literal> и <literal>slow_start</literal> |
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324 игнорируются и такой сервер никогда не будет считаться недоступным. |
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325 </note> |
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326 </para> |
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327 |
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328 </directive> |
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329 |
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330 |
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331 <directive name="zone"> |
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332 <syntax><value>имя</value> [<value>размер</value>]</syntax> |
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333 <default/> |
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334 <context>upstream</context> |
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335 |
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336 <para> |
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337 Задаёт <value>имя</value> и <value>размер</value> зоны разделяемой памяти, |
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338 в которой хранятся конфигурация группы и её рабочее состояние, |
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339 разделяемые между рабочими процессами. |
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340 В одной и той же зоне могут быть сразу несколько групп. |
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341 В этом случае достаточно указать <value>размер</value> только один раз. |
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342 </para> |
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343 |
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344 <para> |
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345 Дополнительно, как часть |
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346 <commercial_version>коммерческой подписки</commercial_version>, |
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|
347 в таких группах для изменения состава группы |
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348 или настроек отдельных серверов |
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349 нет необходимости перезапускать nginx. |
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|
350 Конфигурация доступна через |
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351 модуль <link doc="../http/ngx_http_api_module.xml">API</link> (1.13.3). |
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352 <note> |
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353 До версии 1.13.3 |
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354 конфигурация была доступна только через специальный location, |
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355 в котором указана директива |
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356 <link doc="../http/ngx_http_upstream_conf_module.xml" id="upstream_conf"/>. |
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357 </note> |
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358 </para> |
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359 |
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360 </directive> |
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361 |
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362 |
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363 <directive name="state"> |
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364 <syntax><value>файл</value></syntax> |
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365 <default/> |
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366 <context>upstream</context> |
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367 <appeared-in>1.9.7</appeared-in> |
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368 |
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369 <para> |
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370 Задаёт <value>файл</value>, в котором хранится состояние |
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371 динамически настраиваемой группы. |
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372 </para> |
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373 |
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374 <para> |
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375 Примеры: |
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376 <example> |
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377 state /var/lib/nginx/state/servers.conf; # путь для Linux |
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378 state /var/db/nginx/state/servers.conf; # путь для FreeBSD |
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379 </example> |
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380 </para> |
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381 |
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382 <para> |
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383 В данный момент состояние ограничено списком серверов с их параметрами. |
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384 Файл читается при парсинге конфигурации и обновляется каждый раз при |
2283
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385 <link doc="../http/ngx_http_api_module.xml" id="stream_upstreams_stream_upstream_name_servers_">изменении</link> |
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|
386 конфигурации группы. |
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387 Изменение содержимого файла напрямую не рекомендуется. |
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388 Директиву нельзя использовать |
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389 совместно с директивой <link id="server"/>. |
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390 </para> |
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391 |
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392 <para> |
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393 <note> |
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394 Изменения, совершённые в момент |
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395 <link doc="../control.xml" id="reconfiguration">перезагрузки конфигурации</link> |
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|
396 или <link doc="../control.xml" id="upgrade">обновления бинарного файла</link>, |
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|
397 могут быть потеряны. |
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398 </note> |
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|
399 </para> |
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|
400 |
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|
401 <para> |
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|
402 <note> |
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|
403 Эта директива доступна как часть |
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|
404 <commercial_version>коммерческой подписки</commercial_version>. |
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|
405 </note> |
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|
406 </para> |
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|
407 |
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|
408 </directive> |
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|
409 |
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|
410 |
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|
411 <directive name="hash"> |
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|
412 <syntax><value>ключ</value> [<literal>consistent</literal>]</syntax> |
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|
413 <default/> |
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|
414 <context>upstream</context> |
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|
415 |
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|
416 <para> |
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|
417 Задаёт метод балансировки нагрузки для группы, при котором |
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|
418 соответствие клиента серверу определяется при помощи |
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|
419 хэшированного значения <value>ключа</value>. |
1744
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|
420 В качестве <value>ключа</value> может использоваться текст, переменные |
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|
421 и их комбинации (1.11.2). |
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|
422 Пример использования: |
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|
423 <example> |
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|
424 hash $remote_addr; |
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|
425 </example> |
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|
426 Следует отметить, что любое добавление или удаление серверов в группе |
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|
427 может привести к перераспределению большинства ключей на другие серверы. |
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|
428 Метод совместим с библиотекой Perl |
2275
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|
429 <link url="https://metacpan.org/pod/Cache::Memcached">Cache::Memcached</link>. |
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430 </para> |
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|
431 |
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|
432 <para> |
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|
433 Если задан параметр <literal>consistent</literal>, то вместо |
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|
434 вышеописанного метода будет использоваться метод консистентного хэширования |
2274
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|
435 <link url="https://www.metabrew.com/article/libketama-consistent-hashing-algo-memcached-clients">ketama</link>. |
1728
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|
436 Метод гарантирует, что при добавлении сервера в группу или его удалении |
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|
437 на другие серверы будет перераспределено минимальное число ключей. |
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|
438 Применение метода для кэширующих серверов обеспечивает |
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|
439 больший процент попаданий в кэш. |
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|
440 Метод совместим с библиотекой Perl |
2275
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|
441 <link url="https://metacpan.org/pod/Cache::Memcached::Fast">Cache::Memcached::Fast</link> |
1728
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|
442 при значении параметра <value>ketama_points</value> равным 160. |
1367
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|
443 </para> |
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|
444 |
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|
445 </directive> |
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|
446 |
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|
447 |
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|
448 <directive name="least_conn"> |
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|
449 <syntax/> |
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|
450 <default/> |
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|
451 <context>upstream</context> |
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changeset
|
452 |
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Updated commercial docs for the upcoming release.
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parents:
diff
changeset
|
453 <para> |
1728
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Translated the stream upstream module into Russian.
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parents:
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changeset
|
454 Задаёт для группы метод балансировки нагрузки, при котором соединение |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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diff
changeset
|
455 передаётся серверу с наименьшим числом активных соединений, |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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diff
changeset
|
456 с учётом весов серверов. |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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diff
changeset
|
457 Если подходит сразу несколько серверов, они выбираются циклически |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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diff
changeset
|
458 (в режиме round-robin) с учётом их весов. |
1367
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Updated commercial docs for the upcoming release.
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parents:
diff
changeset
|
459 </para> |
f1e14d87d833
Updated commercial docs for the upcoming release.
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parents:
diff
changeset
|
460 |
f1e14d87d833
Updated commercial docs for the upcoming release.
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parents:
diff
changeset
|
461 </directive> |
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parents:
diff
changeset
|
462 |
1450
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Updated commercial docs for the upcoming release.
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diff
changeset
|
463 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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changeset
|
464 <directive name="least_time"> |
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|
465 <syntax> |
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|
466 <literal>connect</literal> | |
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|
467 <literal>first_byte</literal> | |
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|
468 <literal>last_byte</literal> |
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|
469 [<literal>inflight</literal>]</syntax> |
1450
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|
470 <default/> |
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|
471 <context>upstream</context> |
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|
472 |
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changeset
|
473 <para> |
1728
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Translated the stream upstream module into Russian.
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changeset
|
474 Задаёт для группы метод балансировки нагрузки, при котором соединение |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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diff
changeset
|
475 передаётся серверу с наименьшими средним временем ответа и |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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changeset
|
476 числом активных соединений с учётом весов серверов. |
f93a5aadad2c
Translated the stream upstream module into Russian.
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parents:
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diff
changeset
|
477 Если подходит сразу несколько серверов, то они выбираются циклически |
f93a5aadad2c
Translated the stream upstream module into Russian.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
478 (в режиме round-robin) с учётом их весов. |
1450
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|
479 </para> |
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changeset
|
480 |
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Updated commercial docs for the upcoming release.
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changeset
|
481 <para> |
1728
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Translated the stream upstream module into Russian.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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changeset
|
482 Если указан параметр <literal>connect</literal>, |
2196
5ad35130cc7f
Added links to variables in least_time.
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parents:
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changeset
|
483 то учитывается время |
5ad35130cc7f
Added links to variables in least_time.
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parents:
2191
diff
changeset
|
484 <link id="var_upstream_connect_time">соединения</link> с сервером группы. |
1728
f93a5aadad2c
Translated the stream upstream module into Russian.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
485 Если указан параметр <literal>first_byte</literal>, |
2196
5ad35130cc7f
Added links to variables in least_time.
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parents:
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diff
changeset
|
486 то учитывается время получения |
5ad35130cc7f
Added links to variables in least_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2191
diff
changeset
|
487 <link id="var_upstream_first_byte_time">первого байта</link> данных. |
1728
f93a5aadad2c
Translated the stream upstream module into Russian.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1727
diff
changeset
|
488 Если указан параметр <literal>last_byte</literal>, |
2196
5ad35130cc7f
Added links to variables in least_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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changeset
|
489 то учитывается время получения |
2230
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
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parents:
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changeset
|
490 <link id="var_upstream_session_time">последнего байта</link> данных. |
1925
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
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parents:
1891
diff
changeset
|
491 Если указан параметр <literal>inflight</literal> (1.11.6), |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
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parents:
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changeset
|
492 то также учитываются незавершённые соединения. |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
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parents:
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diff
changeset
|
493 <note> |
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parents:
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diff
changeset
|
494 До версии 1.11.6 |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
495 незавершённые соединения учитывались по умолчанию. |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
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|
496 </note> |
1450
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|
497 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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parents:
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diff
changeset
|
498 |
1462
e69e4dbcc760
Documented OSS stream modules.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
499 <para> |
e69e4dbcc760
Documented OSS stream modules.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
500 <note> |
1728
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Translated the stream upstream module into Russian.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
501 Эта директива доступна как часть |
f93a5aadad2c
Translated the stream upstream module into Russian.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
502 <commercial_version>коммерческой подписки</commercial_version>. |
1462
e69e4dbcc760
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parents:
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diff
changeset
|
503 </note> |
e69e4dbcc760
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parents:
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diff
changeset
|
504 </para> |
e69e4dbcc760
Documented OSS stream modules.
Vladimir Homutov <vl@nginx.com>
parents:
1450
diff
changeset
|
505 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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parents:
1410
diff
changeset
|
506 </directive> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1410
diff
changeset
|
507 |
2191
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
508 |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
509 <directive name="random"> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
510 <syntax>[<literal>two</literal> [<value>метод</value>]]</syntax> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
511 <default/> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
512 <context>upstream</context> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
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diff
changeset
|
513 <appeared-in>1.15.1</appeared-in> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
514 |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
515 <para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
516 Задаёт для группы метод балансировки нагрузки, при котором соединение |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
517 передаётся случайно выбранному серверу, с учётом весов |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
518 серверов. |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
519 </para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
520 |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
521 <para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
522 Если указан необязательный параметр <literal>two</literal>, |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
523 то nginx случайным образом выбирает |
2197
03f8a9c5e8ae
Updated link in the "random" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2196
diff
changeset
|
524 <link url="https://homes.cs.washington.edu/~karlin/papers/balls.pdf">два</link> |
2191
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
525 сервера, из которых выбирает сервер, |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
526 используя указанный <literal>метод</literal>. |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
527 Методом по умолчанию является <literal>least_conn</literal>, |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
528 при котором соединение передаётся на сервер |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
529 с наименьшим количеством активных соединений. |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
530 </para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
531 |
2230
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
532 <para id="random_least_time"> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
533 Если указан метод <literal>least_time</literal>, то соединение передаётся |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
534 серверу |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
535 с наименьшими средним временем ответа и числом активных соединений. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
536 Если указан <literal>least_time=connect</literal>, |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
537 то учитывается время |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
538 <link id="var_upstream_connect_time">соединения</link> с сервером группы. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
539 Если указан <literal>least_time=first_byte</literal>, |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
540 то учитывается время получения |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
541 <link id="var_upstream_first_byte_time">первого байта</link> данных. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
542 Если указан <literal>least_time=last_byte</literal>, |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
543 то учитывается время получения |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
544 <link id="var_upstream_session_time">последнего байта</link> данных. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
545 <note> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
546 Метод <literal>least_time</literal> доступен как часть |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
547 <commercial_version>коммерческой подписки</commercial_version>. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
548 </note> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
549 </para> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2222
diff
changeset
|
550 |
2191
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
551 </directive> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2097
diff
changeset
|
552 |
2469
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
553 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
554 <directive name="resolver"> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
555 <syntax> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
556 <value>адрес</value> ... |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
557 [<literal>valid</literal>=<value>время</value>] |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
558 [<literal>ipv6</literal>=<literal>on</literal>|<literal>off</literal>] |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
559 [<literal>status_zone</literal>=<value>зона</value>]</syntax> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
560 <default/> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
561 <context>upstream</context> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
562 <appeared-in>1.17.5</appeared-in> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2434
diff
changeset
|
563 |
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564 <para> |
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565 Задаёт серверы DNS, используемые для преобразования имён вышестоящих серверов |
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566 в адреса, например: |
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|
567 <example> |
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|
568 resolver 127.0.0.1 [::1]:5353; |
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569 </example> |
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570 Адрес может быть указан в виде доменного имени или IP-адреса, |
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571 и необязательного порта. |
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572 Если порт не указан, используется порт 53. |
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573 Серверы DNS опрашиваются циклически. |
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|
574 </para> |
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|
575 |
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576 <para id="resolver_ipv6"> |
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577 По умолчанию nginx будет искать как IPv4-, так и IPv6-адреса |
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578 при преобразовании имён в адреса. |
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579 Если поиск IPv6-адресов нежелателен, |
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580 можно указать параметр <literal>ipv6=off</literal>. |
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581 </para> |
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|
582 |
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|
583 <para id="resolver_valid"> |
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584 По умолчанию nginx кэширует ответы, используя значение TTL из ответа. |
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|
585 Необязательный параметр <literal>valid</literal> позволяет это |
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|
586 переопределить: |
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587 <example> |
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588 resolver 127.0.0.1 [::1]:5353 valid=30s; |
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589 </example> |
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|
590 <note> |
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|
591 Для предотвращения DNS-спуфинга рекомендуется |
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592 использовать DNS-серверы в защищённой доверенной локальной сети. |
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|
593 </note> |
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|
594 </para> |
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|
595 |
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|
596 <para id="resolver_status_zone"> |
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597 Необязательный параметр <literal>status_zone</literal> |
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|
598 включает |
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|
599 <link doc="../http/ngx_http_api_module.xml" id="resolvers_">сбор информации</link> |
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|
600 о запросах и ответах сервера DNS |
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|
601 в указанной <value>зоне</value>. |
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|
602 </para> |
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changeset
|
603 |
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|
604 <para> |
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|
605 <note> |
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|
606 Эта директива доступна как часть |
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|
607 <commercial_version>коммерческой подписки</commercial_version>. |
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|
608 </note> |
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|
609 </para> |
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|
610 |
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|
611 </directive> |
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|
612 |
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|
613 |
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|
614 <directive name="resolver_timeout"> |
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615 <syntax><value>время</value></syntax> |
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616 <default>30s</default> |
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617 <context>upstream</context> |
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618 <appeared-in>1.17.5</appeared-in> |
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|
619 |
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|
620 <para> |
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|
621 Задаёт таймаут для преобразования имени в адрес, например: |
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|
622 <example> |
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|
623 resolver_timeout 5s; |
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624 </example> |
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|
625 </para> |
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|
626 |
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|
627 <para> |
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|
628 <note> |
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629 Эта директива доступна как часть |
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630 <commercial_version>коммерческой подписки</commercial_version>. |
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631 </note> |
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|
632 </para> |
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|
633 |
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|
634 </directive> |
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|
635 |
1367
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|
636 </section> |
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|
637 |
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|
638 |
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|
639 <section id="variables" name="Встроенные переменные"> |
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|
640 |
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|
641 <para> |
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|
642 Модуль <literal>ngx_stream_upstream_module</literal> |
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|
643 поддерживает следующие встроенные переменные: |
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|
644 <list type="tag"> |
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|
645 |
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|
646 <tag-name id="var_upstream_addr"><var>$upstream_addr</var></tag-name> |
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|
647 <tag-desc> |
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|
648 хранит IP-адрес и порт или путь к UNIX-сокету сервера группы (1.11.4). |
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|
649 Если при проксировании были сделаны обращения к нескольким серверам, |
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|
650 то их адреса разделяются запятой, например |
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|
651 “<literal>192.168.1.1:12345, 192.168.1.2:12345, unix:/tmp/sock</literal>”. |
2058
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Documented upstream name in $upstream_addr.
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1947
diff
changeset
|
652 Если сервер не может быть выбран, |
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Documented upstream name in $upstream_addr.
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changeset
|
653 то переменная хранит имя группы серверов. |
1772
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diff
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|
654 </tag-desc> |
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|
655 |
2308
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|
656 <tag-name id="var_upstream_bytes_received"><var>$upstream_bytes_received</var></tag-name> |
1773
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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|
657 <tag-desc> |
2308
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changeset
|
658 число байт, полученных от сервера группы (1.11.4). |
1773
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|
659 Значения нескольких соединений |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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|
660 разделяются запятыми подобно адресам в переменной |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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|
661 <link id="var_upstream_addr">$upstream_addr</link>. |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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|
662 </tag-desc> |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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|
663 |
2308
956685eb1d43
Reordered $upstream_bytes_ variables aphabetically in stream.
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|
664 <tag-name id="var_upstream_bytes_sent"><var>$upstream_bytes_sent</var></tag-name> |
1773
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|
665 <tag-desc> |
2308
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diff
changeset
|
666 число байт, переданных на сервер группы (1.11.4). |
1773
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diff
changeset
|
667 Значения нескольких соединений |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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diff
changeset
|
668 разделяются запятыми подобно адресам в переменной |
9c48a717e001
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changeset
|
669 <link id="var_upstream_addr">$upstream_addr</link>. |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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diff
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|
670 </tag-desc> |
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Documented $upstream_bytes_sent, $upstream_bytes_received in stream.
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|
671 |
1774
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
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1773
diff
changeset
|
672 <tag-name id="var_upstream_connect_time"><var>$upstream_connect_time</var></tag-name> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
673 <tag-desc> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
674 время установки соединения с сервером группы (1.11.4); |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
675 время хранится в секундах с точностью до миллисекунд. |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
676 Времена нескольких соединений |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
677 разделяются запятыми подобно адресам в переменной |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
678 <link id="var_upstream_addr">$upstream_addr</link>. |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
679 </tag-desc> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
680 |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
681 <tag-name id="var_upstream_first_byte_time"><var>$upstream_first_byte_time</var></tag-name> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
682 <tag-desc> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
683 время получения первого байта данных (1.11.4); |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
684 время хранится в секундах с точностью до миллисекунд. |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
685 Времена нескольких соединений |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
686 разделяются запятыми подобно адресам в переменной |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
687 <link id="var_upstream_addr">$upstream_addr</link>. |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
688 </tag-desc> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
689 |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
690 <tag-name id="var_upstream_session_time"><var>$upstream_session_time</var></tag-name> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
691 <tag-desc> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
692 длительность сессии в секундах с точностью до миллисекунд (1.11.4). |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
693 Времена нескольких соединений |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
694 разделяются запятыми подобно адресам в переменной |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
695 <link id="var_upstream_addr">$upstream_addr</link>. |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
696 </tag-desc> |
e1e0c5b27515
Documented $upstream_connect_time, $upstream_first_byte_time, $upstream_session_time.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1773
diff
changeset
|
697 |
1772
536dc1885e24
Documented the $upstream_addr variable in stream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1744
diff
changeset
|
698 </list> |
536dc1885e24
Documented the $upstream_addr variable in stream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1744
diff
changeset
|
699 </para> |
536dc1885e24
Documented the $upstream_addr variable in stream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1744
diff
changeset
|
700 |
536dc1885e24
Documented the $upstream_addr variable in stream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1744
diff
changeset
|
701 </section> |
536dc1885e24
Documented the $upstream_addr variable in stream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1744
diff
changeset
|
702 |
1367
f1e14d87d833
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
703 </module> |