Uninstalling

You can remove the Event Streams from your platform as follows:

Uninstalling an Event Streams instance by using the CLI

You can delete an Event Streams installation using the Kubernetes command-line tool (kubectl):

Ensure you are using the namespace where your Event Streams instance is located:

kubectl config set-context --current --namespace=<insert-namespace-name-here>

Run the following command to display the Event Streams instances:
```
kubectl get eventstreams -n <namespace>
```

Run the following command to delete your instance:

kubectl delete eventstreams <instance-name> -n <namespace>

Check uninstallation progress

Run the following command to check the progress:

kubectl get pods --selector app.kubernetes.io/instance=<instance_name>

Pods will initially display a STATUS Terminating and then be removed from the output as they are deleted.

$ kubectl get pods --selector app.kubernetes.io/instance=minimal-prod
>
NAME                                            READY     STATUS        RESTARTS   AGE
minimal-prod-entity-operator-77dfff7c79-cnrx5   0/2       Terminating   0          5h35m
minimal-prod-ibm-es-admapi-b49f976c9-xhsrv      0/1       Terminating   0          5h35m
minimal-prod-ibm-es-recapi-6f6bd784fc-jvf9z     0/1       Terminating   0          5h35m
minimal-prod-ibm-es-ac-reg-6dffdb54f9-dfdpl     0/3       Terminating   0          5h35m
minimal-prod-ibm-es-ui-5dd7496dbc-qks7m         0/2       Terminating   0          5h35m
minimal-prod-kafka-0                            2/2       Terminating   0          5h36m
minimal-prod-zookeeper-0                        0/2       Terminating   0          5h37m

Removing persistence resources

If you had enabled persistence for the Event Streams instance but set the deleteClaim storage property to false, you will need to manually remove the associated Persistent Volumes (PVs) and Persistent Volume Claims (PVCs) that were created at installation time.

The deleteClaim property is configured in the EventStreams custom resource and can be set to true during installation to ensure the PVs and PVCs are automatically removed when the instance is deleted.

For Kafka and ZooKeeper, this property can be found as follows:

spec.strimziOverrides.kafka.storage.deleteClaim
spec.strimziOverrides.zookeeper.storage.deleteClaim

For other components, this property can be found as follows:

spec.<component_name>.storage.deleteClaim

Important: This change will cause data to be removed during an upgrade.

For example, to configure automatic deletion for the Kafka storage when uninstalling:

apiVersion: eventstreams.ibm.com/v1beta2
kind: EventStreams
# ...
spec:
  # ...
  strimziOverrides:
    # ...
    kafka:
      # ...
      storage:
        type: persistent-claim
        # ...
        deleteClaim: true

To remove any remaining storage, delete the PVCs first then delete any remaining PVs.

Delete the Persistent Volume Claims (PVCs):

Run the following command to list the remaining PVCs associated with the deleted instance:
```
kubectl get pvc --selector app.kubernetes.io/instance=<instance_name>
```
Run the following to delete a PVC:
```
kubectl delete pvc <pvc_name>
```

Delete remaining Persistent Volumes (PVs):

Run the following command to list the remaining PVs:
```
kubectl get pv
```
Run the following command to delete any PVs that were listed in the Volume column of the deleted PVCs.
```
kubectl delete pv <pv_name>
```

Note: Take extreme care to select the correct PV name to ensure you do not delete storage associated with a different application instance.

Uninstalling an Event Streams instance by using the OpenShift web console

To delete an Event Streams instance on OpenShift Container Platform:

Log in to the OpenShift Container Platform web console using your login credentials.
Expand the Operators dropdown and select Installed Operators to open the Installed Operators page.
Expand the Project dropdown and select the project the instance is installed in. Click the operator called IBM Event Streams managing the project.
In the Operator Details panel, select the Event Streams tab to show the Event Streams instances in the selected namespace.
Click More options next to the instance to be deleted to open the actions menu.
Click the Delete EventStreams menu option to open the confirmation panel.
Check the namespace and instance name and click Delete to shutdown the associated pods and delete the instance.

Check uninstallation progress

Log in to the OpenShift Container Platform web console using your login credentials.
Expand the Workloads dropdown and select Pods to open the Pods dashboard.
Click Select All Filters to display pods in any state.
Enter the name of the Event Streams instance being deleted in the Filter by name box.
Wait for all the Event Streams pods to be displayed as Terminating and then be removed from the list.

Removing persistence resources

For Kafka and ZooKeeper, this property can be found as follows:

spec.strimziOverrides.kafka.storage.deleteClaim
spec.strimziOverrides.zookeeper.storage.deleteClaim

For other components, this property can be found as follows:

spec.<component_name>.storage.deleteClaim

Important: This change will cause data to be removed during an upgrade.

For example, to configure automatic deletion for the Kafka storage when uninstalling:

apiVersion: eventstreams.ibm.com/v1beta2
kind: EventStreams
# ...
spec:
  # ...
  strimziOverrides:
    # ...
    kafka:
      # ...
      storage:
        type: persistent-claim
        # ...
        deleteClaim: true

To remove any remaining storage, delete the PVCs first then delete any remaining PVs.

Delete the Persistent Volume Claims (PVCs):

Log in to the OpenShift Container Platform web console using your login credentials.
Expand the Storage dropdown and select Persistent Volume Claims to open the Persistent Volume Claims page.
In the Project dropdown select the required namespace.
Click Select All Filters to display PVCs in any state.
Enter the name of the Event Streams instance in the Filter by name box.
For each PVC to be deleted, make a note of the Persistent Volume listed for that PVC and then click More options to open the actions menu.
Click the Delete Persistent Volume Claim menu option to open the confirmation panel.
Check the PVC name and namespace, then click Delete to remove the PVC.

Delete remaining Persistent Volumes (PVs):

Log in to the OpenShift Container Platform web console using your login credentials.
Expand the Storage dropdown and select Persistent Volumes to open the Persistent Volumes page.
In the Project dropdown select the required namespace.
For each PV you made a note of when deleting PVCs, click More options to open the actions menu.
Click the Delete Persistent Volume menu option to open the confirmation panel.
Check the PV name and click Delete to remove the PV.

Note: Take extreme care to select the correct PV name to ensure you do not delete storage associated with a different application instance.

Uninstalling an Event Streams operator on OpenShift Container Platform

To delete an Event Streams operator:

Log in to the OpenShift Container Platform web console using your login credentials.
Expand Operators and click Installed Operators.
In the Project dropdown select the required namespace. For cluster-wide operators, select the openshift-operators project.
Click More options next to the Event Streams operator to be deleted to open the actions menu.
Click the Uninstall Operator menu option to open the confirmation panel.
Check the namespace and operator name, then click Remove to uninstall the operator.

The Event Streams Custom Resource Definitions (CRDs) are not deleted automatically on OpenShift Container Platform. You must manually delete any CRDs that you do not want:

Log in to the OpenShift Container Platform web console using your login credentials.
Expand Administration and click Custom Resource Definitions.
Enter eventstreams in the Filter by name box to filter the CRDs associated with Event Streams.
Click More options next to the CRD to be deleted to open the actions menu.
Click the Delete Custom Resource Definition menu option to open the confirmation panel.
Check the name of the CRD and click Delete to remove the CRD.

Uninstalling an Event Streams operator on other Kubernetes platforms

To delete an Event Streams operator:

Run the following command to select the namespace the operator is installed on:

kubectl config set-context --current --namespace=<operator-namespace-name-here>

Run the following command to list the helm releases installed on that namespace:
```
helm list
```
Find the Event Streams operator release, it should have the chart as ibm-eventstreams-operator-<version-number>

Important: When multiple Event Streams operators are installed on the same cluster, all the operators share the same custom resource definitions (CRDs). Do not delete these global resources that other operators on the cluster depend upon. The Event Streams operator that was installed first on the cluster must not be uninstalled if you have other Event Streams operators deployed on the same cluster.
Run the following command to uninstall the Event Streams operator and the Event Streams Custom Resource Definitions (CRDs):
```
helm uninstall <release-name>
```

Uninstalling IBM Cloud Pak foundational services on OpenShift

If you have IBM Cloud Pak foundational services, see the foundational services documentation for information about uninstalling it.