Change the method to get the ApiServer hostname#1
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The kube-apiserver operator is going to degraded state while changing ApiServer URL in Infrastructure config.
Note: If there is no port specified
Ref:
https://github.com/openshift/cluster-kube-apiserver-operator/blob/master/pkg/operator/certrotationcontroller/externalloadbalancer.go#L24
I0511 16:20:50.553418 1 servicehostname.go:40] syncing servicenetwork hostnames: [172.30.0.1 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local openshift openshift.default openshift.default.svc openshift.default.svc.cluster.local]
I0511 16:20:50.553446 1 panic.go:679] Finished waiting for CertRotation
I0511 16:20:50.553456 1 panic.go:679] Shutting down CertRotation
panic: runtime error: slice bounds out of range [:-1]
goroutine 271 [running]:
github.com/openshift/cluster-kube-apiserver-operator/pkg/operator/certrotationcontroller.(*CertRotationController).syncExternalLoadBalancerHostnames(0xc000a980a0, 0x0, 0x0)
github.com/openshift/cluster-kube-apiserver-operator@/pkg/operator/certrotationcontroller/externalloadbalancer.go:24 +0x295