Mercurial > hg > ngx_http_upstream_keepalive
view t/memcached-keepalive.t @ 45:489c5d4318ff draft
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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#!/usr/bin/perl # (C) Maxim Dounin # Test for memcached with keepalive. ############################################################################### use warnings; use strict; use Test::More; use Test::Nginx; ############################################################################### select STDERR; $| = 1; select STDOUT; $| = 1; eval { require Cache::Memcached; }; plan(skip_all => 'Cache::Memcached not installed') if $@; my $t = Test::Nginx->new()->has('rewrite')->has_daemon('memcached')->plan(16) ->write_file_expand('nginx.conf', <<'EOF'); %%TEST_GLOBALS%% daemon off; events { } http { %%TEST_GLOBALS_HTTP%% upstream memd { server 127.0.0.1:8081; keepalive 1; } upstream memd3 { server 127.0.0.1:8081; server 127.0.0.1:8082; keepalive 1; } upstream memd4 { server 127.0.0.1:8081; server 127.0.0.1:8082; keepalive 10; } server { listen 127.0.0.1:8080; server_name localhost; location / { set $memcached_key $uri; memcached_pass memd; } location /next { set $memcached_key $uri; memcached_next_upstream not_found; memcached_pass memd; } location /memd3 { set $memcached_key "/"; memcached_pass memd3; } location /memd4 { set $memcached_key "/"; memcached_pass memd4; } } } EOF my $memhelp = `memcached -h`; my @memopts1 = (); my @memopts2 = (); if ($memhelp =~ /repcached/) { # repcached patches adds additional listen socket memcached # that should be different too push @memopts1, '-X', '8091'; push @memopts2, '-X', '8092'; } if ($memhelp =~ /-U/) { # UDP ports no longer off by default in memcached 1.2.7+ push @memopts1, '-U', '0'; push @memopts2, '-U', '0'; } $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8081', @memopts1); $t->run_daemon('memcached', '-l', '127.0.0.1', '-p', '8082', @memopts2); $t->run(); $t->waitforsocket('127.0.0.1:8081') or die "Unable to start memcached"; $t->waitforsocket('127.0.0.1:8082') or die "Unable to start second memcached"; ############################################################################### my $memd1 = Cache::Memcached->new(servers => [ '127.0.0.1:8081' ]); my $memd2 = Cache::Memcached->new(servers => [ '127.0.0.1:8082' ]); $memd1->set('/', 'SEE-THIS'); $memd2->set('/', 'SEE-THIS'); $memd1->set('/big', 'X' x 1000000); my $total = $memd1->stats()->{total}->{total_connections}; like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request'); like(http_get('/notfound'), qr/404/, 'keepalive memcached not found'); like(http_get('/next'), qr/404/, 'keepalive not found with memcached_next_upstream'); like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again'); like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again'); like(http_get('/'), qr/SEE-THIS/, 'keepalive memcached request again'); is($memd1->stats()->{total}->{total_connections}, $total + 1, 'only one connection used'); # Since nginx doesn't read all data from connection in some situations (head # requests, post_action, errors writing to client) we have to close such # connections. Check if we really do close them. $total = $memd1->stats()->{total}->{total_connections}; unlike(http_head('/'), qr/SEE-THIS/, 'head request'); like(http_get('/'), qr/SEE-THIS/, 'get after head'); is($memd1->stats()->{total}->{total_connections}, $total + 1, 'head request closes connection'); $total = $memd1->stats()->{total}->{total_connections}; unlike(http_head('/big'), qr/XXX/, 'big head'); like(http_get('/'), qr/SEE-THIS/, 'get after big head'); is($memd1->stats()->{total}->{total_connections}, $total + 1, 'big head request closes connection'); # two backends with maximum number of cached connections set to 1, # should establish new connection on each request $total = $memd1->stats()->{total}->{total_connections} + $memd2->stats()->{total}->{total_connections}; http_get('/memd3'); http_get('/memd3'); http_get('/memd3'); is($memd1->stats()->{total}->{total_connections} + $memd2->stats()->{total}->{total_connections}, $total + 3, '3 connections should be established'); # two backends with maximum number of cached connections set to 10, # should establish only two connections (1 per backend) $total = $memd1->stats()->{total}->{total_connections} + $memd2->stats()->{total}->{total_connections}; http_get('/memd4'); http_get('/memd4'); http_get('/memd4'); is($memd1->stats()->{total}->{total_connections} + $memd2->stats()->{total}->{total_connections}, $total + 2, 'connection per backend'); $t->stop(); like(`grep -F '[alert]' ${\($t->testdir())}/error.log`, qr/^$/s, 'no alerts'); ###############################################################################