I have read a lot about monitoring delayed_job with monit. The implementation is pretty easy and straight forward. But When one worker is not enough how do I setup monit to ensure that, let's say, 10 workers are constantly running?
You can just replicate the same config you have for the first worker N times. Suppose you have 5 workers, you'll monitor all of them with the following:
check process delayed_job.0
with pidfile /path/to/shared/pids/delayed_job.0.pid
start program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job -n 5 start' - user"
stop program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job stop' - user"
check process delayed_job.1
with pidfile /path/to/shared/pids/delayed_job.1.pid
start program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job -n 5 start' - user"
stop program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job stop' - user"
check process delayed_job.2
with pidfile /path/to/shared/pids/delayed_job.2.pid
start program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job -n 5 start' - user"
stop program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job stop' - user"
check process delayed_job.3
with pidfile /path/to/shared/pids/delayed_job.3.pid
start program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job -n 5 start' - user"
stop program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job stop' - user"
check process delayed_job.4
with pidfile /path/to/shared/pids/delayed_job.4.pid
start program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job -n 5 start' - user"
stop program = "/bin/su -c '/usr/bin/env RAILS_ENV=production /path/to/current/script/delayed_job stop' - user"
来源：https://stackoverflow.com/questions/6071970/monitoring-multiple-delayed-job-workers-with-monit