on GKE I created some pods and a headless service. The headless service has a selector and I am expecting the endpoint to get the IP of the Pod that matches the selector.
However the endpoint remains empty
$ kubectl get pods -lservice=front-end
NAME READY STATUS RESTARTS AGE
front-end-1567472915-tei91 1/1 Running 0 12m
$ kubectl get svc -lapp=sockshop
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
front-end None <none> 11m
$ kubectl get endpoints -lapp=sockshop
NAME ENDPOINTS AGE
front-end <none> 11m
$ more svc.yaml
apiVersion: v1
kind: Service
metadata:
labels:
app: sockshop
name: front-end
spec:
clusterIP: None
ports: null
selector:
service: front-end
I would expect an endpoint to get the IP of the Pod so that the DNS registration works.
if ports is set to null the endpoint will not get populated.
You need to add a port (even a dummy one) for the endpoint to get populated with the PodIPs of the Pods that match the selector.
ports: - port: 1234 protocol: TCP targetPort: 1234