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#!/usr/bin/env perl
# NOTE: These tests cover the act of reloading the configuration; changing
# backends, pools, routes, etc. It doesn't cover ensuring the code of the main
# file changes naturally, which is fine: there isn't any real way that can
# fail and it can be covered specifically in a different test file.
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);
if (!supports_proxy()) {
plan skip_all => 'proxy not enabled';
exit 0;
}
# TODO: possibly... set env var to a generated temp filename before starting
# the server so we can pass that in?
my $modefile = "/tmp/proxyconfigmode.lua";
# 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;
}
# 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");
}
sub write_modefile {
my $cmd = shift;
open(my $fh, "> $modefile") or die "Couldn't overwrite $modefile: $!";
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 @mocksrvs = ();
diag "making mock servers";
for my $port (11511, 11512, 11513, 11514, 11515, 11516) {
my $srv = mock_server($port);
ok(defined $srv, "mock server created");
push(@mocksrvs, $srv);
}
diag "testing failure to start";
write_modefile("invalid syntax");
eval {
my $p_srv = new_memcached('-o proxy_config=./t/proxyconfig.lua -l 127.0.0.1', 11510);
};
ok($@ && $@ =~ m/Failed to connect/, "server successfully not started");
write_modefile('return "none"');
my $p_srv = new_memcached('-o proxy_config=./t/proxyconfig.lua -l 127.0.0.1', 11510);
my $ps = $p_srv->sock;
$ps->autoflush(1);
# Create a watcher so we can monitor when reloads complete.
my $watcher = $p_srv->new_sock;
print $watcher "watch proxyevents\n";
is(<$watcher>, "OK\r\n", "watcher enabled");
{
# test with stubbed main routes.
print $ps "mg foo v\r\n";
is(scalar <$ps>, "SERVER_ERROR no mg route\r\n", "no mg route loaded");
}
# Load some backends
{
write_modefile('return "start"');
$p_srv->reload();
wait_reload($watcher);
}
{
# set up server backend sockets.
my @mbe = ();
for my $msrv ($mocksrvs[0], $mocksrvs[1], $mocksrvs[2]) {
my $be = $msrv->accept();
$be->autoflush(1);
ok(defined $be, "mock backend created");
push(@mbe, $be);
}
my $s = IO::Select->new();
for my $be (@mbe) {
$s->add($be);
like(<$be>, qr/version/, "received version command");
print $be "VERSION 1.0.0-mock\r\n";
}
# Try sending something.
my $cmd = "mg foo v\r\n";
print $ps $cmd;
my @readable = $s->can_read(0.25);
is(scalar @readable, 1, "only one backend became readable");
my $be = shift @readable;
is(scalar <$be>, $cmd, "metaget passthrough");
print $be "EN\r\n";
is(scalar <$ps>, "EN\r\n", "miss received");
}
# Test backend table arguments and per-backend time overrides
{
# This should create three new backend sockets
write_modefile('return "betable"');
$p_srv->reload();
wait_reload($watcher);
# sleep a short time; b1 should have a very short timeout and the
# others are long.
select(undef, undef, undef, 0.5);
my $s = IO::Select->new();
for my $msrv (@mocksrvs) {
$s->add($msrv);
}
my @readable = $s->can_read(0.25);
# All three backends should have changed despite having the same label,
# host, and port arguments.
is(scalar @readable, 3, "all listeners became readable");
like(<$watcher>, qr/ts=(\S+) gid=\d+ type=proxy_backend error=timeout name=\S+ port=11511/, "one backend timed out connecting");
for my $msrv (@readable) {
my $be = $msrv->accept();
ok(defined $be, "mock backend accepted");
like(<$be>, qr/version/, "received version command");
print $be "VERSION 1.0.0-mock\r\n";
}
# reload again and ensure only the bad socket became available.
$p_srv->reload();
wait_reload($watcher);
@readable = $s->can_read(0.5);
is(scalar @readable, 1, "only one listener became readable");
}
# TODO:
# remove backends
# do dead sockets close?
# adding user stats
# changing user stats
# adding backends with the same label don't create more connections
# total backend counters
# change top level routes mid-request
# - send the request to backend
# - issue and wait for reload
# - read from backend and respond, should use the original code still.
# - could also read from backend and then do reload/etc.
done_testing();
END {
unlink $modefile;
}
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