How do I write a bash script to restart a process if it dies?

Question

I have a python script that\'ll be checking a queue and performing an action on each item:

# checkqueue.py
while True:
  check_queue()
  do_something()
         


        

Answer 1

You should use monit, a standard unix tool that can monitor different things on the system and react accordingly.

From the docs: http://mmonit.com/monit/documentation/monit.html#pid_testing

check process checkqueue.py with pidfile /var/run/checkqueue.pid
       if changed pid then exec "checkqueue_restart.sh"

You can also configure monit to email you when it does do a restart.