this post was submitted on 22 Nov 2023
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Tracking Port Usage (alien.top)
submitted 10 months ago by [email protected] to c/[email protected]
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hey all, maybe my Google-Fu is glitching tonight, but what, if anything, do y'all use to track port usage in your docker containers? I know I can browse through Portainer, or grep some data out of my docker compose files etc, but I am hosting things on 3 different machines through a single reverse proxy, and I am just looking for an easy way to trace what ports are in use.

Ideally this would be some sort of container that can gather this data, but looking for recommendations

thanks

app

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[–] [email protected] 1 points 10 months ago

I'm not sure if google-fu is glitching as much as imagination. You have three clean options:

  • docker container ls (shows container name and ports)

  • netstat -ban (shows all ports in use on the system + the binary running the service)

  • Just write documentation for yourself when you bring up a new service. Doesn't have to be anything fancy, a simple markdown or YAML file can be used. I use YAML in case I ever want to use it programmatically.

netstat -an is your friend.

Documentation is your second best friend.