Opened 15 months ago
Last modified 15 months ago
#2464 closed defect
nginx doesn't disable stderr logging when using syslog as it does when using a log file — at Version 1
| Reported by: | Owned by: | ||
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | nginx-core | Version: | 1.22.x |
| Keywords: | Cc: | ||
| uname -a: | Linux raphael 6.2.2-arch1-1 #1 SMP PREEMPT_DYNAMIC Fri, 03 Mar 2023 15:58:31 +0000 x86_64 GNU/Linux | ||
| nginx -V: |
nginx version: nginx/1.22.1
built with OpenSSL 3.0.7 1 Nov 2022 (running with OpenSSL 3.0.8 7 Feb 2023) TLS SNI support enabled configure arguments: --prefix=/etc/nginx --conf-path=/etc/nginx/nginx.conf --sbin-path=/usr/bin/nginx --pid-path=/run/nginx.pid --lock-path=/run/lock/nginx.lock --user=http --group=http --http-log-path=/var/log/nginx/access.log --error-log-path=stderr --http-client-body-temp-path=/var/lib/nginx/client-body --http-proxy-temp-path=/var/lib/nginx/proxy --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-cc-opt='-march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security -fstack-clash-protection -fcf-protection -flto=auto' --with-ld-opt='-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -flto=auto' --with-compat --with-debug --with-file-aio --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_degradation_module --with-http_flv_module --with-http_geoip_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-pcre-jit --with-stream --with-stream_geoip_module --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-threads |
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Description (last modified by )
When using a file for error_log, nginx replaces stderr with it and avoids logging to the stderr passed by the parent. When using syslog for error_log such as this configuration at the top level, it still logs to stderr:
error_log syslog:server=unix:/dev/log,nohostname;
It also interacts oddly with dynamic configuration reloads. If stderr has already been replaced with a file, it remains that way after reloading with a configuration using syslog instead.
It's possible to work around this by setting error_log to both /dev/null and a syslog output but there will still be an extra unnecessary write system call.
error_log syslog:server=unix:/dev/log,nohostname;
error_log /dev/null;
I don't think this is working as intended. It seems replacing stderr with a file shouldn't be how it's disabled so that it's possible to enable stderr logging in a configuration reload. This would address the current issue where it still happens when using syslog along with making it behave properly for configuration reloads.
