id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,uname,nginx_version 783,syslog tag not properly included when writing to unix socket,trcarden@…,,"I am just posting this on the official nginx ticket listing so it gets fixed. Originally reported here: https://bugs.launchpad.net/nginx/+bug/1329400 http://kb.monitorware.com/nginx-logging-rsyslog-t12359.html We are seeing it with syslong-ng as well. The problem is that nginx will dump the hostname twice when using the syslog system. Here is the body from the launchpad bug linked above that goes into more detail: =================================== When using `unix:/dev/log` to write to a socket, like so: access_log syslog:server=unix:/dev/log,tag=nginx warn; The tag is not used properly by syslog to write the log message. This causes the following message to be sent to syslog: 2014-06-12T15:02:09+00:00 user.notice wheezy wheezy nginx: - - localhost:8000 GET 503 206 | - unicorn=- total=0.00 0 | ""curl/7.26.0"" ""/"" ""-"" wheezy is my hostname, and it's written in syslog's tag field. The tag nginx is there, but it's written in the beggining of the `msg` field. My hostname is also written to syslog's `app-name` field. The same faulty behaviour is observed with `error_log`. This works properly when using a remote server, server=.",defect,closed,major,,nginx-core,1.8.x,duplicate,,,Linux 3.13.0-52-generic #86-Ubuntu SMP Mon May 4 04:32:59 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux,"nginx version: nginx/1.8.0 built with OpenSSL 1.0.1f 6 Jan 2014 TLS SNI support enabled configure arguments: --with-cc-opt='-g -O2 -fPIE -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-ipv6 --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_addition_module --with-http_dav_module --with-http_geoip_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module --with-http_spdy_module --with-http_sub_module --with-http_xslt_module --with-mail --with-mail_ssl_module --add-module=/build/buildd/nginx-1.8.0/debian/modules/nginx-auth-pam --add-module=/build/buildd/nginx-1.8.0/debian/modules/nginx-dav-ext-module --add-module=/build/buildd/nginx-1.8.0/debian/modules/nginx-echo --add-module=/build/buildd/nginx-1.8.0/debian/modules/nginx-upstream-fair --add-module=/build/buildd/nginx-1.8.0/debian/modules/ngx_http_substitutions_filter_module"