Question

I am working on creating a daemon in Ruby using the daemons gem. I want to add output from the daemon into a log file. I am wondering what is the easiest way to redirect puts from the console to a log file.

Answer 1

I should recommend to use ruby logger, it is better than puts, you can have multiple log levels that you can turn on/off: debug, warn, info,error, etc.

 logger = Logger.new(STDOUT)  logger = Logger.new('/var/log/my-daemon.log') 

I use runit package to manage ruby services, it has svlogd than will redirect daemon output to log file, here is run script for logger process:

#!/bin/sh set -e  LOG=/var/log/my-daemon  test -d '$LOG' || mkdir -p -m2750 '$LOG' && chown nobody:adm '$LOG' exec chpst -unobody svlogd -tt '$LOG'