Mercurial > hg > nginx-tests
view stream_udp_upstream.t @ 1752:ba6e24e38f03
Tests: improved stop_daemons() to send signal again.
As was observed, it's possible that a signal to complete a uwsgi daemon
can be ignored while it is starting up, which results in tests hang due
to eternal waiting on child processes termination. Notably, it is seen
when running tests with a high number of prove jobs on a low-profile VM
against nginx with broken modules and/or configuration. To reproduce:
$ TEST_NGINX_GLOBALS=ERROR prove -j16 uwsgi*.t
Inspecting uwsgi under ktrace on FreeBSD confirms that a SIGTERM signal
is ignored at the very beginning of uwsgi startup. It is then replaced
with a default action after listen(), thus waiting until uwsgi is ready
to accept new TCP connections doesn't completely solve the hang window.
The fix is to retry sending a signal some time after waitpid(WNOHANG)
continuously demonstrated no progress with reaping a signaled process.
It is modelled after f13ead27f89c that improved stop() for nginx.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Wed, 29 Dec 2021 22:29:23 +0300 |
parents | f3ba4c74de31 |
children |
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#!/usr/bin/perl # (C) Sergey Kandaurov # (C) Nginx, Inc. # Stream tests for upstream module and balancers with datagrams. ############################################################################### use warnings; use strict; use Test::More; BEGIN { use FindBin; chdir($FindBin::Bin); } use lib 'lib'; use Test::Nginx; use Test::Nginx::Stream qw/ dgram /; ############################################################################### select STDERR; $| = 1; select STDOUT; $| = 1; my $t = Test::Nginx->new()->has(qw/stream udp/)->plan(5) ->write_file_expand('nginx.conf', <<'EOF'); %%TEST_GLOBALS%% daemon off; events { } stream { %%TEST_GLOBALS_STREAM%% proxy_responses 1; proxy_timeout 1s; upstream u { server 127.0.0.1:%%PORT_8984_UDP%%; server 127.0.0.1:%%PORT_8985_UDP%%; } upstream u2 { server 127.0.0.1:%%PORT_8986_UDP%% down; server 127.0.0.1:%%PORT_8986_UDP%%; server 127.0.0.1:%%PORT_8984_UDP%%; server 127.0.0.1:%%PORT_8985_UDP%%; } upstream u3 { server 127.0.0.1:%%PORT_8984_UDP%%; server 127.0.0.1:%%PORT_8985_UDP%% weight=2; } upstream u4 { server 127.0.0.1:%%PORT_8986_UDP%% down; server 127.0.0.1:%%PORT_8984_UDP%% backup; } server { listen 127.0.0.1:%%PORT_8980_UDP%% udp; proxy_pass u; } server { listen 127.0.0.1:%%PORT_8981_UDP%% udp; proxy_pass u2; } server { listen 127.0.0.1:%%PORT_8982_UDP%% udp; proxy_pass u3; } server { listen 127.0.0.1:%%PORT_8983_UDP%% udp; proxy_pass u4; } } EOF $t->run_daemon(\&udp_daemon, port(8984), $t); $t->run_daemon(\&udp_daemon, port(8985), $t); $t->run(); $t->waitforfile($t->testdir . '/' . port(8984)); $t->waitforfile($t->testdir . '/' . port(8985)); ############################################################################### my @ports = my ($port4, $port5) = (port(8984), port(8985)); is(many(10, port(8980)), "$port4: 5, $port5: 5", 'balanced'); is(dgram('127.0.0.1:' . port(8981))->io('.', read_timeout => 0.5), '', 'no next upstream for dgram'); is(many(10, port(8981)), "$port4: 5, $port5: 5", 'failures'); is(many(9, port(8982)), "$port4: 3, $port5: 6", 'weight'); is(many(10, port(8983)), "$port4: 10", 'backup'); ############################################################################### sub many { my ($count, $port) = @_; my (%ports); for (1 .. $count) { if (dgram("127.0.0.1:$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 udp_daemon { my ($port, $t) = @_; my $server = IO::Socket::INET->new( Proto => 'udp', LocalAddr => '127.0.0.1:' . $port, Reuse => 1, ) or die "Can't create listening socket: $!\n"; # signal we are ready open my $fh, '>', $t->testdir() . '/' . $port; close $fh; while (1) { $server->recv(my $buffer, 65536); $buffer = $server->sockport(); $server->send($buffer); } } ###############################################################################