Description of problem:
When converting an existing IPv6 single-stack cluster to dual-stack, the pods that were already running are not getting IPv4 addresses after the cluster becomes dual-stack.

Version-Release number of selected component (if applicable): 4.19

How reproducible: Always

Steps to Reproduce:

1. Deploy IPv6 cluster and a test workload

2. Follow this doc for moving to dual-stack 

3. Once the process completes, check pod IPs. It will have only IPv6 addresses.

Actual results:
Pod only has IPv6 addresses:

  hostIP: 2620:52:0:1308::5
  hostIPs:
  - ip: 2620:52:0:1308::5
  - ip: 192.168.111.5
  phase: Running
  podIP: fd01:0:0:1::1fe
  podIPs:
  - ip: fd01:0:0:1::1fe

If I restart the pod (this shouldn't be required):

  hostIP: 2620:52:0:1308::5
  hostIPs:
  - ip: 2620:52:0:1308::5
  - ip: 192.168.111.5
  phase: Running
  podIP: fd01:0:0:1::4a
  podIPs:
  - ip: fd01:0:0:1::4a
  - ip: 10.132.0.41
  qosClass: BestEffort 

Expected results:
Pod gets an IPv4 automatically.

Additional info:

I can provide access to a reproducible environment.

Affected Platforms: OCP 4.19

Is it an

1. internal RedHat testing failure

If it is an internal RedHat testing failure:

• Ping me on slack @mavazque