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#!/usr/bin/perl
# (C) Sergey Kandaurov
# (C) Nginx, Inc.
# Stream tests for upstream least_conn balancer module.
###############################################################################
use warnings;
use strict;
use Test::More;
use IO::Select;
BEGIN { use FindBin; chdir($FindBin::Bin); }
use lib 'lib';
use Test::Nginx;
use Test::Nginx::Stream qw/ stream /;
###############################################################################
select STDERR; $| = 1;
select STDOUT; $| = 1;
my $t = Test::Nginx->new()->has(qw/stream stream_upstream_least_conn/)->plan(2)
->write_file_expand('nginx.conf', <<'EOF');
%%TEST_GLOBALS%%
daemon off;
events {
}
stream {
%%TEST_GLOBALS_STREAM%%
upstream u {
least_conn;
server 127.0.0.1:8081;
server 127.0.0.1:8082;
}
server {
listen 127.0.0.1:8080;
proxy_pass u;
}
}
EOF
$t->run_daemon(\&stream_daemon, port(8081));
$t->run_daemon(\&stream_daemon, port(8082));
$t->run();
$t->waitforsocket('127.0.0.1:' . port(8081));
$t->waitforsocket('127.0.0.1:' . port(8082));
###############################################################################
my @ports = my ($port1, $port2) = (port(8081), port(8082));
is(many(10), "$port1: 5, $port2: 5", 'balanced');
my @sockets;
for (1 .. 2) {
my $s = stream('127.0.0.1:' . port(8080));
$s->write('w');
push @sockets, $s;
}
select undef, undef, undef, 0.2;
is(many(10), "$port2: 10", 'least_conn');
###############################################################################
sub many {
my ($count) = @_;
my (%ports);
for (1 .. $count) {
if (stream('127.0.0.1:' . port(8080))->io('.') =~ /(\d+)/) {
$ports{$1} = 0 unless defined $ports{$1};
$ports{$1}++;
}
}
my @keys = map { my $p = $_; grep { $p == $_ } keys %ports } @ports;
return join ', ', map { $_ . ": " . $ports{$_} } @keys;
}
###############################################################################
sub stream_daemon {
my ($port) = @_;
my $server = IO::Socket::INET->new(
Proto => 'tcp',
LocalAddr => '127.0.0.1',
LocalPort => $port,
Listen => 5,
Reuse => 1
)
or die "Can't create listening socket: $!\n";
my $sel = IO::Select->new($server);
local $SIG{PIPE} = 'IGNORE';
while (my @ready = $sel->can_read) {
foreach my $fh (@ready) {
if ($server == $fh) {
my $new = $fh->accept;
$new->autoflush(1);
$sel->add($new);
} elsif (stream_handle_client($fh)) {
$sel->remove($fh);
$fh->close;
}
}
}
}
sub stream_handle_client {
my ($client) = @_;
log2c("(new connection $client)");
$client->sysread(my $buffer, 65536) or return 1;
log2i("$client $buffer");
my $port = $client->sockport();
if ($buffer =~ /w/ && $port == port(8081)) {
Test::Nginx::log_core('||', "$port: sleep(2.5)");
select undef, undef, undef, 2.5;
}
$buffer = $port;
log2o("$client $buffer");
$client->syswrite($buffer);
return 1;
}
sub log2i { Test::Nginx::log_core('|| <<', @_); }
sub log2o { Test::Nginx::log_core('|| >>', @_); }
sub log2c { Test::Nginx::log_core('||', @_); }
###############################################################################
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