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Deleting Operators from a cluster

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The following describes how to delete, or uninstall, Operators that were previously installed using Operator Lifecycle Manager (OLM) on your Red Hat OpenShift Service on AWS cluster.

You must successfully and completely uninstall an Operator prior to attempting to reinstall the same Operator. Failure to fully uninstall the Operator properly can leave resources, such as a project or namespace, stuck in a "Terminating" state and cause "error resolving resource" messages to be observed when trying to reinstall the Operator.
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Deleting Operators from a cluster using the web console

Cluster administrators can delete installed Operators from a selected namespace by using the web console.

Prerequisites

  • You have access to an Red Hat OpenShift Service on AWS cluster web console using an account with dedicated-admin permissions.

Procedure

  1. Navigate to the Operators → Installed Operators page.

  2. Scroll or enter a keyword into the Filter by name field to find the Operator that you want to remove. Then, click on it.

  3. On the right side of the Operator Details page, select Uninstall Operator from the Actions list.

    An Uninstall Operator? dialog box is displayed.

  4. Select Uninstall to remove the Operator, Operator deployments, and pods. Following this action, the Operator stops running and no longer receives updates.

    This action does not remove resources managed by the Operator, including custom resource definitions (CRDs) and custom resources (CRs). Dashboards and navigation items enabled by the web console and off-cluster resources that continue to run might need manual clean up. To remove these after uninstalling the Operator, you might need to manually delete the Operator CRDs.
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Deleting Operators from a cluster using the CLI

Cluster administrators can delete installed Operators from a selected namespace by using the CLI.

Prerequisites

  • You have access to an Red Hat OpenShift Service on AWS cluster using an account with dedicated-admin permissions.

  • The OpenShift CLI (oc) is installed on your workstation.

Procedure

  1. Ensure the latest version of the subscribed operator (for example, serverless-operator) is identified in the currentCSV field.

    $ oc get subscription.operators.coreos.com serverless-operator -n openshift-serverless -o yaml | grep currentCSV
    Example output
      currentCSV: serverless-operator.v1.28.0

  2. Delete the subscription (for example, serverless-operator):

    $ oc delete subscription.operators.coreos.com serverless-operator -n openshift-serverless
    Example output
    subscription.operators.coreos.com "serverless-operator" deleted

  3. Delete the CSV for the Operator in the target namespace using the currentCSV value from the previous step:

    $ oc delete clusterserviceversion serverless-operator.v1.28.0 -n openshift-serverless
    Example output
    clusterserviceversion.operators.coreos.com "serverless-operator.v1.28.0" deleted
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Refreshing failing subscriptions

In Operator Lifecycle Manager (OLM), if you subscribe to an Operator that references images that are not accessible on your network, you can find jobs in the openshift-marketplace namespace that are failing with the following errors:

Example output
ImagePullBackOff for
Back-off pulling image "example.com/openshift4/ose-elasticsearch-operator-bundle@sha256:6d2587129c846ec28d384540322b40b05833e7e00b25cca584e004af9a1d292e"
Example output
rpc error: code = Unknown desc = error pinging docker registry example.com: Get "https://example.com/v2/": dial tcp: lookup example.com on 10.0.0.1:53: no such host

As a result, the subscription is stuck in this failing state and the Operator is unable to install or upgrade.

You can refresh a failing subscription by deleting the subscription, cluster service version (CSV), and other related objects. After recreating the subscription, OLM then reinstalls the correct version of the Operator.

Prerequisites

  • You have a failing subscription that is unable to pull an inaccessible bundle image.

  • You have confirmed that the correct bundle image is accessible.

Procedure

  1. Get the names of the Subscription and ClusterServiceVersion objects from the namespace where the Operator is installed:

    $ oc get sub,csv -n <namespace>
    Example output
    NAME                                                       PACKAGE                  SOURCE             CHANNEL
subscription.operators.coreos.com/elasticsearch-operator   elasticsearch-operator   redhat-operators   5.0

NAME                                                                         DISPLAY                            VERSION    REPLACES   PHASE
clusterserviceversion.operators.coreos.com/elasticsearch-operator.5.0.0-65   OpenShift Elasticsearch Operator   5.0.0-65              Succeeded

  2. Delete the subscription:

    $ oc delete subscription <subscription_name> -n <namespace>

  3. Delete the cluster service version:

    $ oc delete csv <csv_name> -n <namespace>

  4. Get the names of any failing jobs and related config maps in the openshift-marketplace namespace:

    $ oc get job,configmap -n openshift-marketplace
    Example output
    NAME                                                                        COMPLETIONS   DURATION   AGE
job.batch/1de9443b6324e629ddf31fed0a853a121275806170e34c926d69e53a7fcbccb   1/1           26s        9m30s

NAME                                                                        DATA   AGE
configmap/1de9443b6324e629ddf31fed0a853a121275806170e34c926d69e53a7fcbccb   3      9m30s

  5. Delete the job:

    $ oc delete job <job_name> -n openshift-marketplace

    This ensures pods that try to pull the inaccessible image are not recreated.

  6. Delete the config map:

    $ oc delete configmap <configmap_name> -n openshift-marketplace

  7. Reinstall the Operator using OperatorHub in the web console.

Verification

  • Check that the Operator has been reinstalled successfully:

    $ oc get sub,csv,installplan -n <namespace>