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Chapter 10. Troubleshooting and deleting remaining resources during Uninstall

Occasionally some of the custom resources managed by an operator may remain in "Terminating" status waiting on the finalizer to complete, although you have performed all the required cleanup tasks. In such an event you need to force the removal of such resources. If you do not do so, the resources remain in the Terminating state even after you have performed all the uninstall steps.

  1. Check if the openshift-storage namespace is stuck in the Terminating state upon deletion. 

    $ oc get project -n <namespace>

    Output: 

    NAME                DISPLAY NAME   STATUS
openshift-storage                  Terminating

  2. Check for the NamespaceFinalizersRemaining and NamespaceContentRemaining messages in the STATUS section of the command output and perform the next step for each of the listed resources. 

    $ oc get project openshift-storage -o yaml

    Example output : 

    status:
  conditions:
  - lastTransitionTime: "2020-07-26T12:32:56Z"
    message: All resources successfully discovered
    reason: ResourcesDiscovered
    status: "False"
    type: NamespaceDeletionDiscoveryFailure
  - lastTransitionTime: "2020-07-26T12:32:56Z"
    message: All legacy kube types successfully parsed
    reason: ParsedGroupVersions
    status: "False"
    type: NamespaceDeletionGroupVersionParsingFailure
  - lastTransitionTime: "2020-07-26T12:32:56Z"
    message: All content successfully deleted, may be waiting on finalization
    reason: ContentDeleted
    status: "False"
    type: NamespaceDeletionContentFailure
  - lastTransitionTime: "2020-07-26T12:32:56Z"
    message: 'Some resources are remaining: cephobjectstoreusers.ceph.rook.io has
      1 resource instances'
    reason: SomeResourcesRemain
    status: "True"
    type: NamespaceContentRemaining
  - lastTransitionTime: "2020-07-26T12:32:56Z"
    message: 'Some content in the namespace has finalizers remaining: cephobjectstoreuser.ceph.rook.io
      in 1 resource instances'
    reason: SomeFinalizersRemain
    status: "True"
    type: NamespaceFinalizersRemaining

  3. Delete all the remaining resources listed in the previous step.

    For each of the resources to be deleted, do the following:

    1. Get the object kind of the resource which needs to be removed. See the message in the above output.

      Example :

      message: Some content in the namespace has finalizers remaining: cephobjectstoreuser.ceph.rook.io

      Here cephobjectstoreuser.ceph.rook.io is the object kind.

    2. Get the Object name corresponding to the object kind. 

      $ oc get  <Object-kind> -n  <project-name>

      Example : 

      $ oc get cephobjectstoreusers.ceph.rook.io -n openshift-storage

      Example output: 

      NAME                           AGE
noobaa-ceph-objectstore-user   26h

    3. Patch the resources. 

      $ oc patch -n <project-name> <object-kind>/<object-name> --type=merge -p '{"metadata": {"finalizers":null}}'

      Example: 

      $ oc patch -n openshift-storage cephobjectstoreusers.ceph.rook.io/noobaa-ceph-objectstore-user \
--type=merge -p '{"metadata": {"finalizers":null}}'

      Output: 

      cephobjectstoreuser.ceph.rook.io/noobaa-ceph-objectstore-user patched

  4. Verify that the openshift-storage project is deleted. 

    $ oc get project openshift-storage

    Output: 

    Error from server (NotFound): namespaces "openshift-storage" not found

    If the issue persists, reach out to Red Hat Support.

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