Process.daemon redirects all output to /dev/null by default

[Type-kun]

When no arguments are specified, Process.daemon redirects all output to /dev/null; therefore, if the service is run directly via bundle exec ruby services/sqs_processor.rb --logfile=my.log --pidfile=my.pid, no output is logged. After changing the line to Process.daemon(true, true), it executes fine and logs output as expected.

Disclaimer: I have no idea what sets the RUN environment variable, because googling that turned out quite difficult.

[r888888888]

RUN is something you would set when you don't want it to detach. There's an example of its usage in the Procfile.

[Type-kun]

Keep in mind that setting the arguments as (nil, true) will make the script change its working dir to /, and attempt to create log and pid files there. This would fail unless you run it as root or have write permission on /, or specify the full path for log and pid files. Setting the arguments as (true, true) will make the script stay in the same directory.