Mercurial > hg > nginx-tests
view grpc_next_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 | 97c8280de681 |
children | 236d038dc04a |
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#!/usr/bin/perl # (C) Maxim Dounin # (C) Sergey Kandaurov # (C) Nginx, Inc. # Tests for grpc module, grpc_next_upstream directive. ############################################################################### use warnings; use strict; use Test::More; BEGIN { use FindBin; chdir($FindBin::Bin); } use lib 'lib'; use Test::Nginx; ############################################################################### select STDERR; $| = 1; select STDOUT; $| = 1; my $t = Test::Nginx->new()->has(qw/http http_v2 grpc rewrite/)->plan(9); $t->write_file_expand('nginx.conf', <<'EOF'); %%TEST_GLOBALS%% daemon off; events { } http { %%TEST_GLOBALS_HTTP%% upstream u { server 127.0.0.1:8081 max_fails=2; server 127.0.0.1:8082; } upstream u2 { server 127.0.0.1:8081; server 127.0.0.1:8082; } server { listen 127.0.0.1:8080; server_name localhost; location / { grpc_pass u; grpc_next_upstream http_500 http_404 invalid_header; } location /all/ { grpc_pass u2; grpc_next_upstream http_500 http_404; error_page 404 /all/404; grpc_intercept_errors on; } location /all/404 { return 200 "$upstream_addr\n"; } } server { listen 127.0.0.1:8081 http2; server_name localhost; location / { return 404; } location /ok { return 200 "AND-THIS\n"; } location /500 { return 500; } location /444 { return 444; } location /all/ { return 404; } } server { listen 127.0.0.1:8082 http2; server_name localhost; location / { return 200 "TEST-OK-IF-YOU-SEE-THIS\n"; } location /all/ { return 404; } } } EOF $t->run(); ############################################################################### my ($p1, $p2) = (port(8081), port(8082)); # check if both request fallback to a backend # which returns valid response like(http_get('/'), qr/SEE-THIS/, 'grpc request'); like(http_get('/'), qr/SEE-THIS/, 'second request'); # make sure backend isn't switched off after # grpc_next_upstream http_404 like(http_get('/ok') . http_get('/ok'), qr/AND-THIS/, 'not down'); # next upstream on invalid_header like(http_get('/444'), qr/SEE-THIS/, 'request 444'); like(http_get('/444'), qr/SEE-THIS/, 'request 444 second'); # next upstream on http_500 like(http_get('/500'), qr/SEE-THIS/, 'request 500'); like(http_get('/500'), qr/SEE-THIS/, 'request 500 second'); # make sure backend switched off with http_500 unlike(http_get('/ok') . http_get('/ok'), qr/AND-THIS/, 'down after 500'); # make sure all backends are tried once like(http_get('/all/rr'), qr/^127.0.0.1:($p1, 127.0.0.1:$p2|$p2, 127.0.0.1:$p1)$/mi, 'all tried once'); ###############################################################################