How to Debug a Connection Issue in K8s?

How to debug a connection issue in k8s?

Caused by the networkpolicy controller maybe.

I generally substitute the running image by a busybox and run nc to find out what it can connect to.

If the stuff that does not work is installed via helm, chances are that it follows the bitnami convention, then I can provide a value manifest like this.

myapp:
  image:
    registry: ""
    repository: "busybox"
    tag: latest
  command: ["sleep", "3600"]
  livenessProbe:
    enabled: false
  readinessProbe:
    enabled: false

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