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  1. OpenShift Bugs
  2. OCPBUGS-63492

Network Migration from SDN to OVN failing

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      Description of problem:

      Customer opened OHSS-47367(https://issues.redhat.com/browse/OHSS-47367) due to a failing network migration from SDN to OVN. It did not complete during the time window needed for the customer initially, so they tried to cancel the migration. This seemed to cause an unstable state.
      
      The MTU adjustment was present in the rendered machineconfigs for both master and worker pools. The worker pools showed "UPDATED=true, UpDATING=false" 
      
      However, the migration condition said: NetworkTypeMigrationMTUReady=False with reason MachineConfigNotApplied.
      
      According to our analysis, the infrastructure is actually ready (MTU adjusted, MachineConfigs applied, OVS scripts in place), but the migration state machine is stuck in an inconsistent state where
        it believes it's still waiting for MTU configuration even though that step already completed.
      
      We attempted to force the migration by manually creating a syncset, but it did not apply until we tried to remove that syncset and the cluster began migrating. 

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

          

      How reproducible:

       

      Steps to Reproduce:

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      Actual results:

          

      Expected results:

          

      Additional info:

          

              bbennett@redhat.com Ben Bennett
              erosente.openshift Edward Rosentel
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              Anurag Saxena Anurag Saxena
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                Created:
                Updated: