How to get list of pods that are not linked to any service

Question

How to get list of pods that are not linked to any service

Lets say i have pods:

Svc1-green-xyz and svc1-blue-lmn

Service svc1 is served by svc1-green-xyz . With svc1-blue-lmn is a prior version of the same service and is not used.

I want to select all such unused pods that are not serving any service and delete them. How can this be done. Is there a helm command that can be used?

Answer 1

This is possible, but very hacky. Pods and services aren't really linked , so much as services use selectors to determine which pods they should target. What's really happening is that services keep track of a list of endpoints they need to forward traffic to. So, you could theoretically get a list of all endpoints for a service kubectl get endpoints , filter based on IP address, and remove all pods whose IPs are not in that list. If you're going through all this, though, you're probably doing something wrong.