Mercurial > hg > ngx_http_upstream_keepalive

annotate t/memcached-keepalive.t @ 11:15530a464dba

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Keepalive: don't cache invalid connections. 1. Remember failed status, since peer.free() may be called more than once. It's called twice if peer fails - once from ngx_http_upstream_next() with NGX_PEER_FAILED set, and then from ngx_http_upstream_finalize_request() without. 2. We shouldn't cache connection unless we aren't expecting anything from upstream. For memcached this means either 404 response or 200 response with all body read (body may not be read e.g. when serving HEAD request).
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 13 Nov 2008 19:36:23 +0300
parents bef88ba0b378
children 067ddc059ee0
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1 #!/usr/bin/perl
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2
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3 # (C) Maxim Dounin
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4
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5 # Test for memcached with keepalive.
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6
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7 ###############################################################################
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8
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9 use warnings;
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10 use strict;
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11
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12 use Test::More;
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13 use Test::Nginx;
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14
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15 ###############################################################################
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16
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17 select STDERR; $| = 1;
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18 select STDOUT; $| = 1;
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19
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20 eval { require Cache::Memcached; };
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21 plain(skip_all => 'Cache::Memcached not installed') if $@;
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22
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23 my $t = Test::Nginx->new()->has('rewrite')->has_daemon('memcached')->plan(16)
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24 ->write_file_expand('nginx.conf', <<'EOF');
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25
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26 master_process off;
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27 daemon off;
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28
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29 events {
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30 worker_connections 1024;
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31 }
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32
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33 http {
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34 access_log off;
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35
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36 client_body_temp_path %%TESTDIR%%/client_body_temp;
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37 fastcgi_temp_path %%TESTDIR%%/fastcgi_temp;
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38 proxy_temp_path %%TESTDIR%%/proxy_temp;
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39
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40 upstream memd {
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41 server 127.0.0.1:8081;
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42 keepalive 1;
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43 }
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44
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45 upstream memd2 {
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46 server 127.0.0.1:8081;
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47 server 127.0.0.1:8082;
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48 keepalive 1 single;
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49 }
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50
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51 upstream memd3 {
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52 server 127.0.0.1:8081;
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53 server 127.0.0.1:8082;
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54 keepalive 1;
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55 }
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56
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57 upstream memd4 {
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58 server 127.0.0.1:8081;
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59 server 127.0.0.1:8082;
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60 keepalive 10;
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61 }
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62
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63 server {
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64 listen localhost:8080;
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65 server_name localhost;
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66
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67 location / {
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68 set $memcached_key $uri;
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69 memcached_pass memd;
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70 }
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71
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72 location /next {
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73 set $memcached_key $uri;
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74 memcached_next_upstream not_found;
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75 memcached_pass memd;
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76 }
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77
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78 location /memd2 {
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79 set $memcached_key "/";
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80 memcached_pass memd2;
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81 }
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82
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83 location /memd3 {
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84 set $memcached_key "/";
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85 memcached_pass memd3;
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86 }
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87
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88 location /memd4 {
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89 set $memcached_key "/";
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90 memcached_pass memd4;
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91 }
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92 }
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93 }
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94
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95 EOF
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96
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97 $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8081');
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98 $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8082');
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99 $t->run();
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100
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101 ###############################################################################
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102
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103 my $memd1 = Cache::Memcached->new(servers => [ '127.0.0.1:8081' ]);
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104 my $memd2 = Cache::Memcached->new(servers => [ '127.0.0.1:8082' ]);
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105
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106 $memd1->set('/', 'SEE-THIS');
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107 $memd2->set('/', 'SEE-THIS');
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108 $memd1->set('/big', 'X' x 1000000);
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109
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110 my $total = $memd1->stats()->{total}->{total_connections};
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111
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112 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request');
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113 like(http_get('/notfound'), qr/404/, 'keepalive memcached not found');
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114 like(http_get('/next'), qr/404/,
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115 'keepalive not found with memcached_next_upstream');
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116 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
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117 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
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118 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
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119
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120 is($memd1->stats()->{total}->{total_connections}, $total + 1,
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121 'only one connection used');
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122
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123 # Since nginx doesn't read all data from connection in some situations (head
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124 # requests, post_action, errors writing to client) we have to close such
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125 # connections. Check if we really do close them.
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126
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127 $total = $memd1->stats()->{total}->{total_connections};
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128
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129 unlike(http_head('/'), qr/SEE-THIS/, 'head request');
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130 like(http_get('/'), qr/SEE-THIS/, 'get after head');
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131
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132 is($memd1->stats()->{total}->{total_connections}, $total + 1,
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133 'head request closes connection');
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134
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135 $total = $memd1->stats()->{total}->{total_connections};
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136
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137 unlike(http_head('/big'), qr/XXX/, 'big head');
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138 like(http_get('/'), qr/SEE-THIS/, 'get after big head');
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139
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140 is($memd1->stats()->{total}->{total_connections}, $total + 1,
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141 'big head request closes connection');
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142
6
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143 # two backends with 'single' option - should establish only one connection
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144
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145 $total = $memd1->stats()->{total}->{total_connections} +
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146 $memd2->stats()->{total}->{total_connections};
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147
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148 http_get('/memd2');
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149 http_get('/memd2');
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150 http_get('/memd2');
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151
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152 is($memd1->stats()->{total}->{total_connections} +
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153 $memd2->stats()->{total}->{total_connections}, $total + 1,
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154 'only one connection with two backends and single');
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155
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156 $total = $memd1->stats()->{total}->{total_connections} +
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157 $memd2->stats()->{total}->{total_connections};
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158
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159 # two backends without 'single' option and maximum number of cached
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160 # connections set to 1 - should establish new connection on each request
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161
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162 http_get('/memd3');
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163 http_get('/memd3');
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164 http_get('/memd3');
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165
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166 is($memd1->stats()->{total}->{total_connections} +
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167 $memd2->stats()->{total}->{total_connections}, $total + 3,
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168 '3 connections should be established');
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169
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170 # two backends without 'single' option and maximum number of cached
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171 # connections set to 10 - should establish only two connections (1 per backend)
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172
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173 $total = $memd1->stats()->{total}->{total_connections} +
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174 $memd2->stats()->{total}->{total_connections};
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175
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176 http_get('/memd4');
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177 http_get('/memd4');
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178 http_get('/memd4');
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179
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180 is($memd1->stats()->{total}->{total_connections} +
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181 $memd2->stats()->{total}->{total_connections}, $total + 2,
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182 'connection per backend');
1
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183
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184 ###############################################################################