Mercurial > hg > nginx-tests
view stream_resolver.t @ 1236:93f749c1d5c5
Tests: fixed parallel tests execution with UDP.
Previously, when checking ports availability, a UDP socket was always created
first, then a TCP socket was created. On success, one of UDP and TCP sockets
was closed (depending on the "udp" option) and the second one was used to busy
this port in other scripts. This lead to the following problem: in an attempt
to reopen a UDP socket used in a given testing script it could be stolen by
another script as part of checking ports availability.
To solve this problem, UDP and TCP ports were split into two non-overlapping
ranges: TCP ports are only used in the range 8000-8499, and UDP ports - in
the range 8500-8999. In addition, the order of creating sockets in UDP tests
has been reversed: now a TCP socket used as a lock precedes a UDP socket.
author | Andrey Zelenkov <zelenkov@nginx.com> |
---|---|
date | Thu, 26 Oct 2017 18:00:21 +0300 |
parents | 1beb641e21c9 |
children | e4974af3fb12 |
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#!/usr/bin/perl # (C) Sergey Kandaurov # (C) Nginx, Inc. # Tests for stream upstream name resolved, proxy_next_upstream_tries. ############################################################################### use warnings; use strict; use Test::More; 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_map stream_return/) ->write_file_expand('nginx.conf', <<'EOF'); %%TEST_GLOBALS%% daemon off; events { } stream { map $server_port $upstream { %%PORT_8081%% a.example.com:%%PORT_8090%%; %%PORT_8082%% a.example.com; %%PORT_8083%% nx.example.com:%%PORT_8082%%; } map $server_port $many { default $server_port.many.example.com; } resolver 127.0.0.1:%%PORT_8080_UDP%%; server { listen 127.0.0.1:8081; listen 127.0.0.1:8082; listen 127.0.0.1:8083; proxy_pass $upstream; } server { listen 127.0.0.1:8084; proxy_pass $many:%%PORT_8090%%; proxy_next_upstream_tries 3; proxy_connect_timeout 1s; } server { listen 127.0.0.1:8085; proxy_pass $many:%%PORT_8090%%; proxy_next_upstream_tries 2; proxy_connect_timeout 1s; } server { listen 127.0.0.1:8086; proxy_pass $many:%%PORT_8090%%; proxy_next_upstream_tries 0; proxy_connect_timeout 1s; } server { listen 127.0.0.1:8090; return SEE-THIS; } } EOF $t->run_daemon(\&dns_daemon, port(8080), $t); $t->try_run('no stream resolver')->plan(8); $t->waitforfile($t->testdir . '/' . port(8080)); ############################################################################### ok(stream('127.0.0.1:' . port(8081))->read(), 'resolver'); ok(!stream('127.0.0.1:' . port(8082))->read(), 'upstream no port'); ok(!stream('127.0.0.1:' . port(8083))->read(), 'name not found'); ok(stream('127.0.0.1:' . port(8084))->read(), 'resolved tries'); ok(!stream('127.0.0.1:' . port(8085))->read(), 'resolved tries limited'); ok(stream('127.0.0.1:' . port(8086))->read(), 'resolved tries zero'); $t->stop(); SKIP: { skip "relies on error log contents", 2 unless $ENV{TEST_NGINX_UNSAFE}; my $log = `grep -F '[error]' ${\($t->testdir())}/error.log`; like($log, qr/no port in upstream "a.example.com"/, 'log - no port'); like($log, qr/nx.example.com could not be resolved/, 'log - not found'); } ############################################################################### sub reply_handler { my ($recv_data, $port) = @_; my (@name, @rdata); use constant NOERROR => 0; use constant A => 1; use constant IN => 1; # default values my ($hdr, $rcode, $ttl) = (0x8180, NOERROR, 3600); # decode name my ($len, $offset) = (undef, 12); while (1) { $len = unpack("\@$offset C", $recv_data); last if $len == 0; $offset++; push @name, unpack("\@$offset A$len", $recv_data); $offset += $len; } $offset -= 1; my ($id, $type, $class) = unpack("n x$offset n2", $recv_data); my $name = join('.', @name); if ($name eq 'a.example.com' && $type == A) { push @rdata, rd_addr($ttl, '127.0.0.1'); } elsif ($name =~ qr/many.example.com/ && $type == A) { push @rdata, rd_addr($ttl, '127.0.0.2'); push @rdata, rd_addr($ttl, '127.0.0.2'); push @rdata, rd_addr($ttl, '127.0.0.1'); } $len = @name; pack("n6 (C/a*)$len x n2", $id, $hdr | $rcode, 1, scalar @rdata, 0, 0, @name, $type, $class) . join('', @rdata); } sub rd_addr { my ($ttl, $addr) = @_; my $code = 'split(/\./, $addr)'; return pack 'n3N', 0xc00c, A, IN, $ttl if $addr eq ''; pack 'n3N nC4', 0xc00c, A, IN, $ttl, eval "scalar $code", eval($code); } sub dns_daemon { my ($port, $t) = @_; my ($data, $recv_data); my $socket = IO::Socket::INET->new( LocalAddr => '127.0.0.1', LocalPort => $port, Proto => 'udp', ) or die "Can't create listening socket: $!\n"; local $SIG{PIPE} = 'IGNORE'; # signal we are ready open my $fh, '>', $t->testdir() . '/' . $port; close $fh; while (1) { $socket->recv($recv_data, 65536); $data = reply_handler($recv_data, $port); $socket->send($data); } } ###############################################################################