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  1. OpenShift Bugs
  2. OCPBUGS-12212

cluster failed to convert from dualstack to ipv4 single stack

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    • Bug
    • Resolution: Done
    • Blocker
    • None
    • 4.13.0
    • None
    • Important
    • SDN Sprint 235
    • 1
    • No
    • Approved
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    Description

      Description of problem:

      convert dualstack cluster to ipv4 single stack cluster, worker drain with "  Warning  ErrorReconcilingNode  12s (x3 over 72s)      controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2"
      

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

      4.13

      How reproducible:

       

      Steps to Reproduce:

      1. setup dualstack cluster
      
      # oc get network -o yaml
      apiVersion: v1
      items:
      - apiVersion: config.openshift.io/v1
        kind: Network
        metadata:
          creationTimestamp: "2023-04-07T02:37:31Z"
          generation: 4
          name: cluster
          resourceVersion: "111453"
          uid: fba18f8d-4730-4e83-b7f0-3555b240ef3f
        spec:
          clusterNetwork:
          - cidr: 10.128.0.0/14
            hostPrefix: 23
          - cidr: fd01::/48
            hostPrefix: 64
          externalIP:
            policy: {}
          networkType: OVNKubernetes
          serviceNetwork:
          - 172.30.0.0/16
          - fd02::/112
        status:
          clusterNetwork:
          - cidr: 10.128.0.0/14
            hostPrefix: 23
          - cidr: fd01::/48
            hostPrefix: 64
          clusterNetworkMTU: 1400
          networkType: OVNKubernetes
          serviceNetwork:
          - 172.30.0.0/16
          - fd02::/112
      kind: List
      metadata:
        resourceVersion: ""
      
      
      
      2. Convert to single stack by edit network to 
      
      apiVersion: v1
      items:
      - apiVersion: config.openshift.io/v1
        kind: Network
        metadata:
          creationTimestamp: "2023-04-07T02:37:31Z"
          generation: 6
          name: cluster
          resourceVersion: "214413"
          uid: fba18f8d-4730-4e83-b7f0-3555b240ef3f
        spec:
          clusterNetwork:
          - cidr: 10.128.0.0/14
            hostPrefix: 23
          externalIP:
            policy: {}
          networkType: OVNKubernetes
          serviceNetwork:
          - 172.30.0.0/16
        status:
          clusterNetwork:
          - cidr: 10.128.0.0/14
            hostPrefix: 23
          clusterNetworkMTU: 1400
          networkType: OVNKubernetes
          serviceNetwork:
          - 172.30.0.0/16
      kind: List
      metadata:
        resourceVersion: ""
      
       3. # oc get node
      NAME                            STATUS                     ROLES                  AGE   VERSION
      master-0.ostest.openshift.com   Ready                      control-plane,master   9h    v1.26.2+7195e44
      master-1.ostest.openshift.com   Ready                      control-plane,master   9h    v1.26.2+7195e44
      master-2.ostest.openshift.com   Ready,SchedulingDisabled   control-plane,master   9h    v1.26.2+7195e44
      worker-0.ostest.openshift.com   Ready                      worker                 8h    v1.26.2+7195e44
      worker-1.ostest.openshift.com   Ready                      worker                 8h    v1.26.2+7195e44
      
      4. oc describe node master-2.ostest.openshift.com
      
        Warning  ErrorReconcilingNode  19m (x5 over 21m)      controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  17m (x5 over 19m)      controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  15m (x5 over 17m)      controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  13m (x5 over 15m)      controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  11m (x6 over 13m)      controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  8m50s (x5 over 10m)    controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  6m28s (x5 over 8m28s)  controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  4m10s (x5 over 6m10s)  controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  2m4s (x6 over 4m4s)    controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
        Warning  ErrorReconcilingNode  12s (x4 over 102s)     controlplane  nodeAdd: error adding node "master-2.ostest.openshift.com": failed to get expected host subnets for node master-2.ostest.openshift.com, expected 1 subnet(s) but current number of subnet(s) is 2
      

      Actual results:

       

      Expected results:

       

      Additional info:

       

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              bpickard@redhat.com Ben Pickard
              zzhao1@redhat.com Zhanqi Zhao
              Zhanqi Zhao Zhanqi Zhao
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                Created:
                Updated:
                Resolved: