Daemon vs Upstart for python script

Question

I have written a module in Python and want it to run continuously once started and need to stop it when I need to update other modules. I will likely be using monit to resta

Answer 1

You could check out supervisor. What it is capable of is starting a process at system startup, and then keeping it alive until shutdown.

The simplest configuration file would be:

[program:my_script]
command = /home/foo/bar/venv/bin/python /home/foo/bar/scripts/my_script.py
environment = MY_ENV_VAR=FOO, MY_OTHER_ENV_VAR=BAR
autostart = True
autorestart = True

Then you could link it to /etc/supervisord/conf.d, run sudo supervisorctl to enter management console of supervisor, type in reread so that supervisor notices new config entry and update to display new programs on the status list.

To start/restart/stop a program you could execute sudo supervisorctl start/restart/stop my_script.