Logs go to a file instead of STDOUT

[md5]

I hadn't played around much with the rails image before this week, but I noticed that the logs are be written to the default logs/#{Rails.env}.log file instead of STDOUT.

I think the fix will need to be made for each app that is based on this image (or pretty much any other Dockerized Rails app), so I don't think there's anything to be done in the image itself. I believe the only thing that should be done is to document the issue over at docker-library/docs, so let me know if I should have opened the issue there. At least having the issue in this repo will help people find it if they search for the problem.

The Rails docs show a quick & dirty approach to logging to STDOUT: http://guides.rubyonrails.org/debugging_rails_applications.html#the-logger

There are also things like Heroku's rails_stdout_logging gem: https://github.com/heroku/rails_stdout_logging

[blackxored]

I think you're right, however there might be something we can actually do in the image.

for env in development test production; do
  ln -sfn /dev/stdout log/$env.log
done

assuming workdirs and whatnot.
I think I got this trick from the nginx image or something, can't recall.

Then you'd probably wanna check if you're not getting buffering issues, but I think rails does STDOUT.sync = true I believe, maybe I've mixed thoughts.

EDIT: We only need to do this for production as the other envs seem to work without modification.
Perhaps it could even help to be a bit more "opinionated" (pun intended) at least on the onbuild image to add something like lograge.

[tianon]

Given that the recommended usage for Rails itself is to add it to your project's Gemfile and use bundle to install it, the rails official image has been deprecated as of Jul 5 in favor of using the ruby image directly (see docker-library/docs#503 for more details).

Sorry for the inconvenience! Since the image will not be receiving anything besides minor maintenance updates (version bumps for example), we're closing out old issues accordingly. Thanks!