I've used the python package supervisord with good success. Out of the box it manages stdout & stderr, rotates log files, restarts crashed processes, and has pl

I've used the python package supervisord with good success. Out of the box it manages stdout & stderr, rotates log files, restarts crashed processes, and has plugins for things like REST APIs to restart the process (for example, during an automated deploy). Another plugin can monitor memory usage & take some action when thresholds are reached. I find it very easy to use. You can commit your configuration file for supervisor into your app's repo, and symlink it in to supervisor's conf.d directory. Other plugins add stuff like web based dash boards. Its great for everything from managing a single process on a single machine, or a large cluster of worker processes on multiple servers.