Uploaded image for project: 'OpenShift Bugs'
  1. OpenShift Bugs
  2. OCPBUGS-61303

After migrating a Single-Stack IPv6 cluster to Dual-Stack the pre-existing pods are not getting IPv4 addresses

XMLWordPrintable

    • Quality / Stability / Reliability
    • False
    • Hide

      None

      Show
      None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None

      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

              bbennett@redhat.com Ben Bennett
              mavazque@redhat.com Mario Vazquez Cebrian
              None
              None
              Anurag Saxena Anurag Saxena
              None
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

                Created:
                Updated: