VIO deployment fails at coreDNS failing to connect to kube-api server

Products

• VMware
• VMware Integrated OpenStack

Issue/Introduction

Symptoms:

• VIO deployment fails with coreDNS deployment with error failed to connect to kube-api server.
• Manual coreDNS update fails as well :

kubectl --kubeconfig /etc/kubernetes/admin.conf apply -f /vio/config/input/coredns.yml

Environment

VMware Integrated Openstack 7.x

Cause

A kube-apiserver restart after successful 'kubeadm init'.  The command to delete the coreDNS configmap occurred in the middle of the apiserver restart.

Resolution

This is a known issue affecting VMware Integrated Openstack 7.x.

Workaround:
To work around this issue, contact VMware Support and note this Article ID (90605) in the problem description.

Additional Information

Impact/Risks:
The deployment will not complete.