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annotate stream_upstream_least_conn.t @ 1427:eb1d883305ea

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Tests: avoid edge cases in upstream random two test. Unavailable servers contribute to the number of attempts, if selected, before the balancer would fall back to the default round-robin method. This means that it's quite possible to get server with more connections. To facilitate with selecting two alive servers, down server was removed from the upstream configuration at the cost of slightly worse coverage.
author Sergey Kandaurov <pluknet@nginx.com>
date Thu, 10 Jan 2019 17:42:34 +0300
parents 3fc6817cd84a
children f3ba4c74de31
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1 #!/usr/bin/perl
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2
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3 # (C) Sergey Kandaurov
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4 # (C) Nginx, Inc.
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5
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6 # Stream tests for upstream least_conn balancer module.
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7
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8 ###############################################################################
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9
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10 use warnings;
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11 use strict;
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12
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13 use Test::More;
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14
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15 use IO::Select;
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16
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17 BEGIN { use FindBin; chdir($FindBin::Bin); }
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18
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19 use lib 'lib';
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20 use Test::Nginx;
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21 use Test::Nginx::Stream qw/ stream /;
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22
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23 ###############################################################################
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24
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25 select STDERR; $| = 1;
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26 select STDOUT; $| = 1;
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27
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28 my $t = Test::Nginx->new()->has(qw/stream stream_upstream_least_conn/)->plan(2)
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29 ->write_file_expand('nginx.conf', <<'EOF');
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30
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31 %%TEST_GLOBALS%%
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32
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33 daemon off;
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34
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35 events {
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36 }
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37
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38 stream {
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39 upstream u {
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40 least_conn;
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41 server 127.0.0.1:8081;
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42 server 127.0.0.1:8082;
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43 }
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44
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45 server {
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46 listen 127.0.0.1:8080;
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47 proxy_pass u;
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48 }
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49 }
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50
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51 EOF
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52
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53 $t->run_daemon(\&stream_daemon, port(8081));
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54 $t->run_daemon(\&stream_daemon, port(8082));
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55 $t->run();
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56
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57 $t->waitforsocket('127.0.0.1:' . port(8081));
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58 $t->waitforsocket('127.0.0.1:' . port(8082));
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59
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60 ###############################################################################
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61
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62 my @ports = my ($port1, $port2) = (port(8081), port(8082));
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63
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64 is(many(10), "$port1: 5, $port2: 5", 'balanced');
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65
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66 my @sockets;
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67 for (1 .. 2) {
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68 my $s = stream('127.0.0.1:' . port(8080));
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69 $s->write('w');
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70 push @sockets, $s;
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71 }
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72
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73 select undef, undef, undef, 0.2;
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74
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75 is(many(10), "$port2: 10", 'least_conn');
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76
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77 ###############################################################################
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78
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79 sub many {
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80 my ($count) = @_;
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81 my (%ports);
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82
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83 for (1 .. $count) {
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84 if (stream('127.0.0.1:' . port(8080))->io('.') =~ /(\d+)/) {
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85 $ports{$1} = 0 unless defined $ports{$1};
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86 $ports{$1}++;
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87 }
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88 }
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89
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90 my @keys = map { my $p = $_; grep { $p == $_ } keys %ports } @ports;
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91 return join ', ', map { $_ . ": " . $ports{$_} } @keys;
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92 }
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93
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94 ###############################################################################
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95
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96 sub stream_daemon {
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97 my ($port) = @_;
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98
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99 my $server = IO::Socket::INET->new(
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100 Proto => 'tcp',
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101 LocalAddr => '127.0.0.1',
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102 LocalPort => $port,
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103 Listen => 5,
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104 Reuse => 1
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105 )
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106 or die "Can't create listening socket: $!\n";
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107
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108 my $sel = IO::Select->new($server);
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109
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110 local $SIG{PIPE} = 'IGNORE';
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111
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112 while (my @ready = $sel->can_read) {
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113 foreach my $fh (@ready) {
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114 if ($server == $fh) {
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115 my $new = $fh->accept;
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116 $new->autoflush(1);
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117 $sel->add($new);
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118
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119 } elsif (stream_handle_client($fh)) {
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120 $sel->remove($fh);
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121 $fh->close;
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122 }
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123 }
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124 }
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125 }
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126
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127 sub stream_handle_client {
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128 my ($client) = @_;
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129
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130 log2c("(new connection $client)");
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131
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132 $client->sysread(my $buffer, 65536) or return 1;
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133
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134 log2i("$client $buffer");
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135
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136 my $port = $client->sockport();
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137
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138 if ($buffer =~ /w/ && $port == port(8081)) {
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139 Test::Nginx::log_core('||', "$port: sleep(2.5)");
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140 select undef, undef, undef, 2.5;
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141 }
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142
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143 $buffer = $port;
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144
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145 log2o("$client $buffer");
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146
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147 $client->syswrite($buffer);
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148
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149 return 1;
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150 }
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151
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152 sub log2i { Test::Nginx::log_core('|| <<', @_); }
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153 sub log2o { Test::Nginx::log_core('|| >>', @_); }
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154 sub log2c { Test::Nginx::log_core('||', @_); }
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155
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156 ###############################################################################