Mercurial > hg > ngx_http_upstream_keepalive

annotate t/memcached-keepalive.t @ 45:489c5d4318ff draft

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Keepalive: "single" parameter deprecated. The original idea was to optimize edge cases in case of interchangeable backends, i.e. don't establish a new connection if we have any one cached. This causes more harm than good though, as it screws up underlying balancer's idea about backends used and may result in various unexpected problems.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 25 Jun 2012 22:55:53 +0400
parents 2ee28064a04a
children
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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 plan(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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20
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26 %%TEST_GLOBALS%%
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27
1
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28 daemon off;
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29
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30 events {
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31 }
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32
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33 http {
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34 %%TEST_GLOBALS_HTTP%%
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35
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36 upstream memd {
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37 server 127.0.0.1:8081;
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38 keepalive 1;
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39 }
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40
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41 upstream memd3 {
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42 server 127.0.0.1:8081;
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43 server 127.0.0.1:8082;
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44 keepalive 1;
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45 }
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46
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47 upstream memd4 {
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48 server 127.0.0.1:8081;
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49 server 127.0.0.1:8082;
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50 keepalive 10;
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51 }
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52
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53 server {
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54 listen 127.0.0.1:8080;
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55 server_name localhost;
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56
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57 location / {
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58 set $memcached_key $uri;
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59 memcached_pass memd;
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60 }
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61
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62 location /next {
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63 set $memcached_key $uri;
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64 memcached_next_upstream not_found;
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65 memcached_pass memd;
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66 }
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67
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68 location /memd3 {
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69 set $memcached_key "/";
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70 memcached_pass memd3;
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71 }
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72
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73 location /memd4 {
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74 set $memcached_key "/";
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75 memcached_pass memd4;
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76 }
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77 }
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78 }
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79
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80 EOF
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81
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82 my $memhelp = `memcached -h`;
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83 my @memopts1 = ();
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84 my @memopts2 = ();
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85
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86 if ($memhelp =~ /repcached/) {
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87 # repcached patches adds additional listen socket memcached
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88 # that should be different too
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89
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90 push @memopts1, '-X', '8091';
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91 push @memopts2, '-X', '8092';
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92 }
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93 if ($memhelp =~ /-U/) {
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94 # UDP ports no longer off by default in memcached 1.2.7+
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95
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96 push @memopts1, '-U', '0';
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97 push @memopts2, '-U', '0';
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98 }
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99
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100 $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8081', @memopts1);
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101 $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8082', @memopts2);
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102
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103 $t->run();
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104
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105 $t->waitforsocket('127.0.0.1:8081')
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106 or die "Unable to start memcached";
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107 $t->waitforsocket('127.0.0.1:8082')
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108 or die "Unable to start second memcached";
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109
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110 ###############################################################################
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111
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112 my $memd1 = Cache::Memcached->new(servers => [ '127.0.0.1:8081' ]);
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113 my $memd2 = Cache::Memcached->new(servers => [ '127.0.0.1:8082' ]);
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114
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115 $memd1->set('/', 'SEE-THIS');
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116 $memd2->set('/', 'SEE-THIS');
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117 $memd1->set('/big', 'X' x 1000000);
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118
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119 my $total = $memd1->stats()->{total}->{total_connections};
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120
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121 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request');
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122 like(http_get('/notfound'), qr/404/, 'keepalive memcached not found');
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123 like(http_get('/next'), qr/404/,
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124 'keepalive not found with memcached_next_upstream');
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125 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
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126 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
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127 like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again');
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128
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129 is($memd1->stats()->{total}->{total_connections}, $total + 1,
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130 'only one connection used');
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131
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132 # Since nginx doesn't read all data from connection in some situations (head
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133 # requests, post_action, errors writing to client) we have to close such
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134 # connections. Check if we really do close them.
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135
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136 $total = $memd1->stats()->{total}->{total_connections};
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137
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138 unlike(http_head('/'), qr/SEE-THIS/, 'head request');
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139 like(http_get('/'), qr/SEE-THIS/, 'get after head');
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140
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141 is($memd1->stats()->{total}->{total_connections}, $total + 1,
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142 'head request closes connection');
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143
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144 $total = $memd1->stats()->{total}->{total_connections};
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145
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146 unlike(http_head('/big'), qr/XXX/, 'big head');
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147 like(http_get('/'), qr/SEE-THIS/, 'get after big head');
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148
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149 is($memd1->stats()->{total}->{total_connections}, $total + 1,
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150 'big head request closes connection');
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151
45
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152 # two backends with maximum number of cached connections set to 1,
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153 # should establish new connection on each request
6
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154
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155 $total = $memd1->stats()->{total}->{total_connections} +
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156 $memd2->stats()->{total}->{total_connections};
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157
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158 http_get('/memd3');
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159 http_get('/memd3');
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160 http_get('/memd3');
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parents: 1
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161
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162 is($memd1->stats()->{total}->{total_connections} +
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163 $memd2->stats()->{total}->{total_connections}, $total + 3,
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164 '3 connections should be established');
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165
45
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166 # two backends with maximum number of cached connections set to 10,
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167 # should establish only two connections (1 per backend)
6
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168
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169 $total = $memd1->stats()->{total}->{total_connections} +
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170 $memd2->stats()->{total}->{total_connections};
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171
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172 http_get('/memd4');
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173 http_get('/memd4');
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174 http_get('/memd4');
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parents: 1
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175
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176 is($memd1->stats()->{total}->{total_connections} +
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177 $memd2->stats()->{total}->{total_connections}, $total + 2,
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178 'connection per backend');
1
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179
24
2ee28064a04a Keepalive: correctly close connections on gracefull shutdown.
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180 $t->stop();
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181
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182 like(`grep -F '[alert]' ${\($t->testdir())}/error.log`, qr/^$/s, 'no alerts');
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183
1
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parents:
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184 ###############################################################################