view stream_upstream_hash.t @ 1825:3629eda94c1b

Tests: handling of EWOULDBLOCK from sysread() with IO::Socket::SSL. With IO::Socket::SSL, when select() reports that the socket is readable, reading from it might still fail with EWOULDBLOCK, since no application data is available in the socket. In particular, this might happen with TLSv1.3 when a session ticket is received after the handshake. Fix is to explicitly check for EWOULDBLOCK errors.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 21 Mar 2023 02:57:39 +0300
parents 5ac6efbe5552
children
line wrap: on
line source

#!/usr/bin/perl

# (C) Sergey Kandaurov
# (C) Nginx, Inc.

# Stream tests for upstream hash 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_hash/)->plan(4);

$t->write_file_expand('nginx.conf', <<'EOF');

%%TEST_GLOBALS%%

daemon off;

events {
}

stream {
    %%TEST_GLOBALS_STREAM%%

    upstream hash {
        hash $remote_addr;
        server 127.0.0.1:8082;
        server 127.0.0.1:8083;
    }

    upstream cons {
        hash $remote_addr consistent;
        server 127.0.0.1:8082;
        server 127.0.0.1:8083;
    }

    upstream empty {
        hash $proxy_protocol_addr;
        server 127.0.0.1:8082;
        server 127.0.0.1:8083;
    }

    upstream cempty {
        hash $proxy_protocol_addr consistent;
        server 127.0.0.1:8082;
        server 127.0.0.1:8083;
    }

    server {
        listen      127.0.0.1:8080;
        proxy_pass  hash;
    }

    server {
        listen      127.0.0.1:8081;
        proxy_pass  cons;
    }

    server {
        listen      127.0.0.1:8084;
        proxy_pass  empty;
    }

    server {
        listen      127.0.0.1:8085;
        proxy_pass  cempty;
    }
}

EOF

$t->run_daemon(\&stream_daemon, port(8082));
$t->run_daemon(\&stream_daemon, port(8083));
$t->run();

$t->waitforsocket('127.0.0.1:' . port(8082));
$t->waitforsocket('127.0.0.1:' . port(8083));

###############################################################################

my @ports = my ($port2, $port3) = (port(8082), port(8083));

is(many(10, port(8080)), "$port3: 10", 'hash');
like(many(10, port(8081)), qr/($port2|$port3): 10/, 'hash consistent');

# fallback to round-robin

like(many(4, port(8084)), qr/$port2: 2, $port3: 2/, 'empty key');
like(many(4, port(8085)), qr/$port2: 2, $port3: 2/, 'empty key - consistent');

###############################################################################

sub many {
	my ($count, $port) = @_;
	my (%ports);

	for (1 .. $count) {
		if (stream("127.0.0.1:$port")->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");

	$buffer = $client->sockport();

	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('||', @_); }

###############################################################################