Uninstalling OCNADD

6 Uninstalling OCNADD

This chapter provides information on how to uninstall Oracle Communications Network Analytics Data Director (OCNADD).

When you uninstall a helm chart from the OCNADD deployment, it removes only the Kubernetes objects created during the installation.

Note:

kubectl commands might vary based on the platform deployment. Replace kubectl with Kubernetes environment-specific command line tool to configure kubernetes resources through kube-api server. The instructions provided in this document are as per the Oracle Communications Cloud Native Core, Cloud Native Environment (CNE) version of kube-api server.

Caution:

While deleting any OCNADD resources make sure to provide the corresponding namespace used in the deployment.
Based on requirement, make sure to retain the OCNADD backup before the uninstallation procedure. For more information, see Performing OCNADD Backup Procedures.
Ensure any configured datafeeds are deleted using the OCNADD GUI prior to performing the OCNADD uninstallation steps. For deletion of the datafeeds, refer to Oracle Communications Network Analytics Data Director User Guide.
The command kubectl delete all deletes all the Kubernetes objects in the specified namespace. In case you have created the RBAC resources and service accounts before the Helm installation in the same namespace, and these resources are required, then do not delete them.
The command kubectl delete namespace removes all the resources or objects created in the namespace. Therefore, ensure that you run the command only when you want to delete the namespace completely.

6.1 Uninstalling Worker Group

To uninstall a worker group, all the associated sub-groups (relay agent and mediation) should be uninstalled. The steps below are listed only once, but they should be repeated for all relay agent and mediation groups that should be uninstalled. All mediation groups should be uninstalled one after another, and then the relay agent group should be uninstalled. Replace the <ocnadd-group-namespace> with the relay agent or mediation group namespace.

Run the following command to uninstall the OCNADD group:

helm uninstall <ocnadd-group-release-name> --namespace <ocnadd-group-namespace>

For example:

helm uninstall dd-med --namespace ocnadd-med
helm uninstall dd-ra --namespace ocnadd-relay

Clean up Kafka Configuration for all mediation and relay agent groups.
To clean up the Kafka configuration, perform the following steps:
1. To list the secrets in the namespace, run:
```
kubectl get secrets -n <ocnadd-group-namespace>
```
2. To delete all the secrets related to Kafka, run:
```
kubectl delete secret --all -n <ocnadd-group-namespace>
```
3. To delete the configmap used for Kafka, run:
```
kubectl delete configmap --all -n <ocnadd-group-namespace>
```
4. To delete PVCs used for Kafka:
  1. Run the following command to list the PVCs used in the namespace:
```
kubectl get pvc -n <ocnadd-group-namespace>
```
  2. Run the following command to delete the PVCs used by the brokers and Kraft controllers:
```
kubectl delete pvc --all -n <ocnadd-group-namespace>
```
Run the following command to delete all the objects:
1. To delete all the Kubernetes objects:
```
kubectl delete all --all -n <ocnadd-group-namespace>
```
2. Run the following command to delete specific resources:
```
kubectl delete <resource-type> <resource-name> -n <ocnadd-group-namespace>
```
Delete all the relay agent and mediation group namespaces using the command:
```
kubectl delete namespace <ocnadd-group-namespace>
```

6.2 Uninstalling Management Group

Uninstall the management group using the following command:

helm uninstall <management-release-name> --namespace <management-group-namespace>

For example:

helm uninstall dd-mgmt --namespace ocnadd-mgmt

Check the management group namespace:
```
kubectl get all -n <management-group-namespace>
```
In case of successful uninstallation, no OCNADD resource is displayed in the command output.

If the command output displays OCNADD resources or objects, then perform the following procedure to delete all the objects:
1. To delete all the Kubernetes objects:
```
kubectl delete all --all -n <mgmt-group-namespace>
```
2. Run the following command to delete the specific resources:
```
kubectl delete <resource-type> <resource-name> -n <management-group-namespace>
```
3. Run the following command to delete the management group namespace:
```
kubectl delete namespace <management-group-namespace>
```
  For example:
```
kubectl delete namespace ocnadd-mgmt
```
Clean up the Database.
To clean up the database, perform the following steps:
1. Log in to the MySQL client on the SQL Node with the ocnadduser and password:
```
mysql -h <IP_address of SQL Node> -u <ocnadduser> -p
```
2. To clean up the configuration, alarm, and health database, run the following command and pass the database names:
```
mysql> drop database <dbname>;
```
3. To remove MySQL users while uninstalling OCNADD, run the following commands:
```
SELECT user FROM mysql.user;
DROP USER 'ocnaddappuser@'%';
```

6.3 Verifying Uninstallation

To verify the OCNADD uninstallation, run the following command:

Check if any management, relay agent, or mediation group namespaces exist:

kubectl get namespaces

The output should not list any namespaces for OCNADD groups that are uninstalled.