Have nginx access log and error log log to STDOUT and STDERR of master process

Question

Is there a way to have the master process log to STDOUT STDERR instead of to a file    It seems that you can only pass a filepath to the access log directive   access log   var log nginx access log   And the same goes for error log   error log  var log nginx error log   I understand that this simply may not be a feature of nginx  I d be interested in a concise solution that uses tail  for example  It is preferable though that it comes from the master process though because I am running nginx in the foreground

User · Answer

If the question is docker related    the official nginx docker images do this by making softlinks towards stdout stderr  RUN ln -sf  dev stdout  var log nginx access log  amp  amp  ln -sf  dev stderr  var log nginx error log  REF  https   microbadger com images nginx

User · Answer

Syntax  error log file   stderr   syslog server address  parameter value    memory size  debug   info   notice   warn   error   crit   alert   emerg   Default      error log logs error log error  Context     main  http  stream  server  location   http   nginx org en docs ngx core module html error log  Don t use   dev stderr This will break your setup if you re going to use systemd-nspawn

User · Answer

For a debug purpose    usr sbin nginx -g  daemon off error log  dev stdout debug     For a classic purpose   usr sbin nginx -g  daemon off error log  dev stdout info     Require  Under the server bracket on the config file    access log  dev stdout

User · Answer

When running Nginx in a Docker container  be aware that a volume mounted over the log dir defeats the purpose of creating a softlink between the log files and stdout stderr in your Dockerfile  as described in  Boeboe  s answer    In that case you can either create the softlink in your entrypoint  executed after volumes are mounted  or not use a volume at all  e g  when logs are already collected by a central logging system

User · Answer

In docker image of PHP-FPM  i ve see such approach     cat  usr local etc php-fpm d docker conf  global  error log    proc self fd 2   www    if we send this to  proc self fd 1  it never appears access log    proc self fd 2

User · Answer

Edit  it seems nginx now supports error log stderr  as mentioned in Anon s answer   You can send the logs to  dev stdout  In nginx conf   daemon off  error log  dev stdout info   http     access log  dev stdout            edit  May need to run ln -sf  proc self fd  dev  if using running certain docker containers  then use  dev fd 1 or  dev fd 2

[nginx] Have nginx access_log and error_log log to STDOUT and STDERR of master process

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