Kubernetes - service cluster IP address vs Pod IP address

azure networking dns kubernetes

You only opened port 5432, never a port to ping your service at. If you try to connect to port 5432 you should be able to:

kubectl exec -ti busybox -- telnet postgres.default.svc.cluster.local 5432

or (you really shouldn't be trying to connect directly to IPs)

kubectl exec -ti busybox -- telnet 10.0.209.61 5432

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