Mercurial > hg > nginx-tests
view js_fetch_resolver.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 | 67adc5fd0548 |
children | f89770df737a |
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#!/usr/bin/perl # (C) Dmitry Volyntsev # (C) Nginx, Inc. # Tests for http njs module, fetch method, dns support. ############################################################################### use warnings; use strict; use Test::More; use IO::Select; BEGIN { use FindBin; chdir($FindBin::Bin); } use lib 'lib'; use Test::Nginx; ############################################################################### select STDERR; $| = 1; select STDOUT; $| = 1; plan(skip_all => '127.0.0.2 local address required') unless defined IO::Socket::INET->new( LocalAddr => '127.0.0.2' ); my $t = Test::Nginx->new()->has(qw/http/) ->write_file_expand('nginx.conf', <<'EOF'); %%TEST_GLOBALS%% daemon off; events { } http { %%TEST_GLOBALS_HTTP%% js_import test.js; server { listen 127.0.0.1:8080; server_name localhost; location /njs { js_content test.njs; } location /dns { js_content test.dns; resolver 127.0.0.1:%%PORT_8981_UDP%%; resolver_timeout 1s; } } server { listen 127.0.0.1:8080; server_name aaa; location /loc { js_content test.loc; } } server { listen 127.0.0.1:8080; server_name many; location /loc { js_content test.loc; } } } EOF my $p0 = port(8080); $t->write_file('test.js', <<EOF); function test_njs(r) { r.return(200, njs.version); } function dns(r) { var url = `http://\${r.args.domain}:$p0/loc`; ngx.fetch(url) .then(reply => reply.text()) .then(body => r.return(200, body)) .catch(e => r.return(501, e.message)) } function str(v) { return v ? v : ''}; function loc(r) { var v = r.variables; var body = str(r.requestText); var foo = str(r.headersIn.foo); var bar = str(r.headersIn.bar); var c = r.headersIn.code ? Number(r.headersIn.code) : 200; r.return(c, `\${v.host}:\${v.request_method}:\${foo}:\${bar}:\${body}`); } export default {njs: test_njs, dns, loc}; EOF $t->try_run('no njs.fetch')->plan(3); $t->run_daemon(\&dns_daemon, port(8981), $t); $t->waitforfile($t->testdir . '/' . port(8981)); ############################################################################### local $TODO = 'not yet' unless http_get('/njs') =~ /^([.0-9]+)$/m && $1 ge '0.5.1'; like(http_get('/dns?domain=aaa'), qr/aaa:GET:::$/s, 'fetch dns aaa'); like(http_get('/dns?domain=many'), qr/many:GET:::$/s, 'fetch dns many'); like(http_get('/dns?domain=unknown'), qr/"unknown" could not be resolved/s, 'fetch dns unknown'); ############################################################################### sub reply_handler { my ($recv_data, $port, %extra) = @_; my (@name, @rdata); use constant NOERROR => 0; use constant FORMERR => 1; use constant SERVFAIL => 2; use constant NXDOMAIN => 3; use constant A => 1; use constant IN => 1; # default values my ($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 'aaa' && $type == A) { push @rdata, rd_addr($ttl, '127.0.0.1'); } elsif ($name eq 'many' && $type == A) { push @rdata, rd_addr($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, $t, %extra) = @_; my ($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"; my $sel = IO::Select->new($socket); local $SIG{PIPE} = 'IGNORE'; # signal we are ready open my $fh, '>', $t->testdir() . '/' . $port; close $fh; while (my @ready = $sel->can_read) { foreach my $fh (@ready) { if ($socket == $fh) { $fh->recv($recv_data, 65536); $data = reply_handler($recv_data, $port); $fh->send($data); } else { $fh->recv($recv_data, 65536); unless (length $recv_data) { $sel->remove($fh); $fh->close; next; } again: my $len = unpack("n", $recv_data); $data = substr $recv_data, 2, $len; $data = reply_handler($data, $port, tcp => 1); $data = pack("n", length $data) . $data; $fh->send($data); $recv_data = substr $recv_data, 2 + $len; goto again if length $recv_data; } } } } ###############################################################################