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Windows Machine Config Operator known limitations

Note the following limitations when working with Windows nodes managed by the WMCO (Windows nodes):

  • The following OpenShift Container Platform features are not supported on Windows nodes:

    • Image builds
    • OpenShift Pipelines
    • OpenShift Service Mesh
    • OpenShift monitoring of user-defined projects
    • OpenShift Serverless
    • Vertical Pod Autoscaling
    • Hosted Control Planes

  • The following Red Hat features are not supported on Windows nodes:

  • Dual NIC is not supported on WMCO-managed Windows instances.

  • Windows nodes do not support workloads created by using deployment configs. You can use a deployment or other method to deploy workloads.

  • Red Hat OpenShift support for Windows Containers does not support adding Windows nodes to a cluster through a trunk port. The only supported networking configuration for adding Windows nodes is through an access port that carries traffic for the VLAN.

  • Red Hat OpenShift support for Windows Containers does not support any Windows operating system language other than English (United States).

  • Due to a limitation within the Windows operating system, clusterNetwork CIDR addresses of class E, such as 240.0.0.0, are not compatible with Windows nodes.

  • Kubernetes has identified the following node feature limitations. For more information, see "Compatibility and limitations (Kubernetes documenation)".

    • Huge pages are not supported for Windows containers.
    • Privileged containers are not supported for Windows containers.

  • Kubernetes has identified several API compatibility issues. For more information, see "API compatibility (Kubernetes documenation)".

Additional resources