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#!/usr/bin/env perl
use strict;
use warnings;
use Test::More;
use FindBin qw($Bin);
use lib "$Bin/lib";
use Carp qw(croak);
use MemcachedTest;
use IO::Select;
use IO::Socket qw(AF_INET SOCK_STREAM);
# TODO: possibly... set env var to a generated temp filename before starting
# the server so we can pass that in?
my $configfile = "/tmp/proxyustats.lua";
if (!supports_proxy()) {
plan skip_all => 'proxy not enabled';
exit 0;
}
# Set up some server sockets.
sub mock_server {
my $port = shift;
my $srv = IO::Socket->new(
Domain => AF_INET,
Type => SOCK_STREAM,
Proto => 'tcp',
LocalHost => '127.0.0.1',
LocalPort => $port,
ReusePort => 1,
Listen => 5) || die "IO::Socket: $@";
return $srv;
}
sub accept_backend {
my $srv = shift;
my $be = $srv->accept();
$be->autoflush(1);
ok(defined $be, "mock backend created");
like(<$be>, qr/version/, "received version command");
print $be "VERSION 1.0.0-mock\r\n";
return $be;
}
# Put a version command down the pipe to ensure the socket is clear.
# client version commands skip the proxy code
sub check_version {
my $ps = shift;
print $ps "version\r\n";
like(<$ps>, qr/VERSION /, "version received");
}
# A single line containing prefix, start ustat and end ustat index.
sub write_config {
my $cmd = shift;
open(my $fh, "> $configfile") or die "Couldn't overwrite $configfile: $!";
print $fh $cmd;
close($fh);
}
sub wait_reload {
my $w = shift;
like(<$w>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=start/, "reload started");
like(<$w>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=done/, "reload completed");
}
my ($p_srv, $ps, $watcher);
sub restart_memcached {
if ($p_srv) {
$p_srv->stop();
}
write_config('return "a 1 0"');
$p_srv = new_memcached('-o proxy_config=./t/proxyustats.lua');
$ps = $p_srv->sock;
$ps->autoflush(1);
$watcher = $p_srv->new_sock;
print $watcher "watch proxyevents\n";
is(<$watcher>, "OK\r\n", "watcher enabled");
}
diag "testing failure to start";
write_config("invalid");
eval {
$p_srv = new_memcached('-o proxy_config=./t/proxyustats.lua');
};
ok($@ && $@ =~ m/Failed to connect/, "server successfully not started");
restart_memcached();
subtest 'succeeded to allocate 1024 ustats' => sub {
my $pfx = "a";
my $first = 1;
my $last = 1024;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
wait_reload($watcher);
my $stats = mem_stats($ps, 'proxy');
for my $i ($first..$last) {
my $ustat = "user_" . $pfx . $i;
is($stats->{$ustat}, 0, $ustat . " found");
}
};
subtest 'failed to allocate 1025 ustats' => sub {
my $pfx = "a";
my $first = 1025;
my $last = 1025;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
unlike(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=start/, "reload not started");
unlike(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=done/, "reload not completed");
restart_memcached();
};
subtest 'failed to allocate ustat at index 0' => sub {
my $pfx = "a";
my $first = 0;
my $last = 0;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
unlike(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=start/, "reload not started");
unlike(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=done/, "reload not completed");
restart_memcached();
};
subtest 'succeeded to allocate ustat at 1024 only' => sub {
# restart memcached to clear any ustats.
restart_memcached();
my $pfx = "a";
my $first = 1024;
my $last = 1024;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
wait_reload($watcher);
my $stats = mem_stats($ps, 'proxy');
while (my ($ustat, $value) = each %{$stats}) {
if (index($ustat, "user_") == 0) {
is($ustat, "user_a1024", "user_a1024 found");
}
}
};
subtest 'ustats incr/decr and perseverance over reload' => sub {
# restart memcached to clear any ustats.
restart_memcached();
my $pfx = "a";
my $first = 1;
my $last = 3;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
wait_reload($watcher);
print $ps "mg 1\r\n";
is(scalar <$ps>, "HD\r\n", "mg 1 hit");
print $ps "mg 2\r\n";
is(scalar <$ps>, "HD\r\n", "mg 2 hit");
print $ps "mg 2\r\n";
is(scalar <$ps>, "HD\r\n", "mg 2 hit");
my $stats = mem_stats($ps, 'proxy');
is($stats->{user_a1}, 1, "user_a1 is 1");
is($stats->{user_a2}, 4, "user_a2 is 4");
is($stats->{user_a3}, 0, "user_a3 is 0");
$pfx = "b";
$first = 2;
$last = 4;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
wait_reload($watcher);
# subtract 2 at idx 2.
print $ps "mg -2\r\n";
is(scalar <$ps>, "HD\r\n", "mg -2 hit");
$stats = mem_stats($ps, 'proxy');
is($stats->{user_a1}, 1, "user_a1 is 1");
is($stats->{user_b2}, 2, "user_b2 is 2");
is($stats->{user_b3}, 0, "user_b3 is 0");
is($stats->{user_b4}, 0, "user_b4 is 0");
};
subtest 'failed to allocate ustat longer than 128 chars' => sub {
my $pfx = '*' x 128;
my $first = 1;
my $last = 1;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
unlike(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=start/, "reload not started");
unlike(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_conf status=done/, "reload not completed");
restart_memcached();
};
subtest 'negative ustat value underflow' => sub {
# restart memcached to clear any ustats.
restart_memcached();
my $pfx = "a";
my $first = 1;
my $last = 1;
write_config('return "' . $pfx . ' ' . $first . ' ' . $last . '"');
$p_srv->reload();
wait_reload($watcher);
print $ps "mg -1\r\n";
is(scalar <$ps>, "HD\r\n", "mg -1 hit");
my $stats = mem_stats($ps, 'proxy');
isnt($stats->{user_a1}, -1, "user_a1 is not -1");
};
done_testing();
END {
unlink $configfile;
}
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