Rails production.log rolling using the standard Linux logrotate mechanism

rails-app

# put this into /etc/logrotate.d/app-production
# to have a Rails app running on unicorns rotating/rolling its logs monthly
# check with logrotate -f /etc/logrotate.d/app-production

/web/app/production/shared/log/*.log {
  monthly
  missingok
  rotate 24
  compress
  delaycompress
  sharedscripts
  postrotate
    kill -s HUP `cat /web/app/production/shared/pids/unicorn.pid`
  endscript
}