Merge pull request #36999 from jszczepkowski/ha-e2e-onerepl

Automatic merge from submit-queue

Fixed e2e tests for HA master.

Set of fixes that allows HA master e2e tests to pass for removal/addition master replicas.

The summary of changes:
- fixed host name in etcd certs,
- added cluster validation after kube-down,
- fixed the number of master replicas in cluster validation,
- made MULTIZONE=true required for HA master deployments, ensured we correctly handle MULTIZONE=true when user wants to create HA master but not kubelets in multiple zones,
- extended verification of master replicas in HA master e2e tests.

hack/e2e-internal/e2e-add-master.sh

@@ -20,6 +20,7 @@ if [[ ! -z "${1:-}" ]]; then
   export KUBE_GCE_ZONE="${1}"
 fi
 export KUBE_REPLICATE_EXISTING_MASTER=true
+export MULTIZONE=true
 
 source "${KUBE_ROOT}/hack/e2e-internal/e2e-up.sh"