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 Environment (OCCNE) version of kube-api server.

Caution:

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.

To uninstall OCNADD, run the following command:

Helm 2:

helm delete --purge <release_name> --namespace <namespace>

Helm 3:

helm3 uninstall <release_name> --namespace <namespace>

where, release_name is a name provided to identify the helm deployment.

release-namespace is the name provided to identify the namespace of OCNADD deployment.

Clean Up Database

To clean up database, perform the following steps:

Log in to the MySQL client on SQL Node with the OCNADD user and password:
```
mysql -h <IP_adress of SQL Node> -u ocnadduser -p (Give password in prompt)
```
To clean up the configuration, alarm, and health database, run the following command:
```
mysql> drop database <dbname>;
```
To remove MySQL users while uninstalling OCNADD, run the following commands:
```
SELECT user FROM mysql.user;
DROP USER 'ocnaddappuser@'%';
```

Clean up Kafka Configuration

To clean up Kafka configuration, perform the following steps:

To list the secrets in the namespace, run the following command:
```
kubectl get secrets -n <namespace>
```
To delete all the secrets related to Kafka, run the following command:
```
kubectl delete secret -n <namespace> <secretname> <secretname>
```
Note:
To delete multiple secrets simultaneously, run the following command:
```
kubetl delete secret kafka-broker1-secret kafka-broker2-secret kafka-broker3-secret kafka-broker3-secret jaas-secret ocnaddadminservice-secret -n ocnadd 
```
To delete configmap used for Kafka, run the following command:
```
kubectl delete configmap allfiles-configmap -n <namespace>
```
To delete PVCs used for Kafka,
1. run the following command, and list the PVCs used in the namespace:
```
kubectl get pvc -n <namespace>
```
2. run the following command, and delete the PVCs used by the brokers and zookeepers:
```
kubectl delete pvc broker1-pvc-kafka-broker1-0 broker2-pvc-kafka-broker2-0 broker3-pvc-kafka-broker3-0 kafka-broker-security-zookeeper-0 kafka-broker-security-zookeeper-1 kafka-broker-security-zookeeper-2 -n <namespace>
```

Delete Cluster Role and Cluster Rolebindings

To delete cluster role and cluster rolebindings, perform the following steps:

To list the cluster roles in the namespace, run the following command:
```
kubectl get clusterrole | grep <namespace>
```
To delete the cluster roles, run the following command:
```
kubectl delete clusterrole <name of clusterrole>
```
To list the cluster rolebindings, run the following command:
```
kubectl get clusterrolebinding | grep <namespace>
```
To delete the cluster rolebindings, run the following command:
```
kubectl delete clusterrolebinding <name of clusterrolebinding>
```

Verifying Uninstallation

To verify the Oracle Communications Network Analytics Data Director (OCNADD) uninstallation, run the following command:

kubectl get all -n <release-namespace>

In case of successful uninstallation, no OCNADD resource is displayed in the command output.

If the command output displays the OCNADD resources or objects, then perform the following procedure:

Run the following command to delete all the objects:
- To delete all the Kubernete objects:
```
kubectl delete all --all -n <release-namespace>
```
- To delete all the configmaps:
```
kubectl delete cm --all -n <release-namespace>
```
  Caution:
  The commands delete all the Kubernetes objects of 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.
Run the following command to delete the specific resources:
```
kubectl delete <resource-type> <resource-name> -n <release-namespace>
```
Run the following command to delete the Kubernetes namespace:
```
kubectl delete namespace <release-namespace>
```
Example:
```
kubectl delete namespace ocnadd
```
Caution:
The command 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.