Converting IPv6 Primary Dual Stack to IPv6 Single stack causing control plane failures. OVN masters in CLBO state peridically

OVN masters logs: http://shell.lab.bos.redhat.com/~anusaxen/convert/

MG is not working as cluster lands in bad shape. Happy to share cluster if needed for debugging

4.13.0-0.nightly-2023-04-21-084440

Always

1.Bring cluster on IPv6 Primary Dual Stack

2.Edit network.config.openshift.io from dual stack to single like as follow


spec:
    clusterNetwork:
    - cidr: fd01::/48
      hostPrefix: 64
    - cidr: 10.128.0.0/14
      hostPrefix: 23
    externalIP:
      policy: {}
    networkType: OVNKubernetes
    serviceNetwork:
    - fd02::/112
    - 172.30.0.0/16
  status:
    clusterNetwork:
    - cidr: fd01::/48
      hostPrefix: 64
    - cidr: 10.128.0.0/14
      hostPrefix: 23
    clusterNetworkMTU: 1400
    networkType: OVNKubernetes
    serviceNetwork:
    - fd02::/112
    - 172.30.0.0/16


TO



 apiVersion: v1
items:
- apiVersion: config.openshift.io/v1
  kind: Network
  metadata:
    creationTimestamp: "2023-04-27T14:11:37Z"
    generation: 3
    name: cluster
    resourceVersion: "81045"
    uid: 28f15675-e739-4262-9acc-4c2c0df4b38d
  spec:
    clusterNetwork:
    - cidr: fd01::/48
      hostPrefix: 64
    externalIP:
      policy: {}
    networkType: OVNKubernetes
    serviceNetwork:
    - fd02::/112
  status:
    clusterNetwork:
    - cidr: fd01::/48
      hostPrefix: 64
    clusterNetworkMTU: 1400
    networkType: OVNKubernetes
    serviceNetwork:
    - fd02::/112
kind: List
metadata:
  resourceVersion: ""

3. Wait for control plane components to roll out successfully

Cluster fails with network, ETCD, Kube API and ingress failures

Cluster should convert to IPv6 single without any issues

MGs not working due to varios control place restricting it