Should I use forever/pm2 within a (Docker) container?

Question

I am refactoring a couple of node.js services. All of them used to start with forever on virtual servers, if the process crashed they just relaunch.

Now

Answer 1

While it's a good idea to use --restart=always as a failsafe, container restarting is relatively slow (5+ seconds with the simple Hello World Node server described here), so you can minimize app downtime using something like forever.

A downside of restarting the process within the container is that crash recovery can now happen two ways, which might have implications for your monitoring, etc.