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  1. OpenShift Bugs
  2. OCPBUGS-29270

Cluster build failing with API and ingress VIPs in a MachineNetwork allocation pool

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      Description of problem:

      level=error msg=failed to fetch Master Machines: failed to load asset "Install Config": failed to create install config: [platform.openstack.apiVIPs: Invalid value: "10.226.212.71": apiVIP can not fall in a MachineNetwork allocation pool, platform.openstack.ingressVIPs: Invalid value: "10.226.212.72": ingressVIP can not fall in a MachineNetwork allocation pool]
      
      It was said in the support case that this validation was added intentionally to avoid IP conflicts. For the reasons below, a workaround is needed. It has also been seen that a similar install on 4.14 does not trigger this validation which suggests there may be a bug.
      
      Reasoning for workaround or bugfix:
      
      Securing a New Subnet: Obtaining a new subnet from OpenStack for API and Ingress VIPs poses a challenge. Additionally, dedicating a subnet solely for API and Ingress VIPs might result in underutilization.
      
      Inter-subnet Connectivity: Establishing connectivity between the two subnets is a concern.
      
      Upgrade Management: Managing both subnets during upgrades from Openshift and Openstack introduces complexities.
      
      Automation Adjustments: Significant changes in automation processes are required to accommodate IP assignment modifications.
      
      
      This is fairly critical for the customer as they cannot currently rebuild in a DR scenario and they cannot do rebuild testing.

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

          4.12

      How reproducible:

      Always

      Steps to Reproduce:

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      Actual results:

          

      Expected results:

          

      Additional info:

          

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              Unassigned Unassigned
              rh-ee-ebakken Eric Bakken
              Gaoyun Pei Gaoyun Pei
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