Mercurial > hg > nginx-tests
view stream_upstream_hash.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 | 5ac6efbe5552 |
children |
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#!/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('||', @_); } ###############################################################################