Chapter 6. Completing the migration

Procedure

1. Recreate necessary network policies in the new OpenShift Service Mesh 3 control plane namespace.
2. Recreate network policies for each namespace that was part of the OpenShift Service Mesh 2 mesh.

3. Update labels.

   1. Update corresponding network policy selectors to match the new labels.

      Note

      Use a label scoped specifically to your mesh that you can reuse for discovery selectors.

Procedure

1. Verify that your new injection label is present in all workload namespaces.

2. Update the app.controller.configmapNamespaceSelector field by running the following command:

   helm upgrade cert-manager-istio-csr jetstack/cert-manager-istio-csr \
      --install \
      --reuse-values \
      --namespace istio-system \
      --wait \
      --set "app.controller.configmapNamespaceSelector=tenant=tenant-a"

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Procedure

1. Find all Service Mesh 2.6 resources by running the following command:

   $ oc get smcp,smm,smmr -A

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2. Remove all ServiceMeshControlPlane resources by running the following command:

   $ oc delete smcp --all -A

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3. Remove all ServiceMeshMemberRoll resources by running the following command:

   $ oc delete smmr --all -A

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4. Remove all ServiceMeshMember resources by running the following command:

   $ oc delete smm --all -A

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5. Verify that all resources were removed by running the following command:

   $ oc get smcp,smm,smmr -A

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   Example output

   No resources found

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Procedure

1. Check that there are no Red Hat OpenShift Service Mesh 2.6 resources left by running the following command:

   $ oc get smcp,smm,smmr -A

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   Example output

   No resources found

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2. Remove the Operator by running the following commands:

   1. Find the Operator subscription:

      csv=$(oc get subscription servicemeshoperator -n openshift-operators -o yaml | grep currentCSV | cut -f 2 -d ':')

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   2. Delete the subscription:

      $ oc delete subscription servicemeshoperator -n openshift-operators

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   3. Delete the clusterserviceversion CSV:

      $ oc delete clusterserviceversion $csv -n openshift-operators

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3. Remove maistra CRDs by running the following command:

   $ oc get crds -o name | grep ".*\.maistra\.io" | xargs -r -n 1 oc delete

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Procedure

1. Verify that all OpenShift Service Mesh 2.6 resources have been removed by running the following command:

   $ oc get smcp,smm,smmr -A

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   Example output

   No resources found

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2. Find namespaces with the maistra.io/ignore-namespace="true" label by running the following command:

   $ oc get namespace -l maistra.io/ignore-namespace="true"

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   Example output

   NAME       STATUS   AGE
   bookinfo   Active   127m

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3. Remove the label by running the following command:

   $ oc label namespace bookinfo maistra.io/ignore-namespace-

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   Example output

   namespace/bookinfo unlabeled

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