Uninstalling Watson Assistant

A project administrator can uninstall Watson Assistant.

What permissions do you need to complete this task?

The permissions that you need depend on which tasks you must complete:

To uninstall Watson Assistant, you must be an administrator of the project where Watson Assistant is installed. This project is identified by the ${PROJECT_CPD_INSTANCE} environment variable.
To uninstall the Watson Assistant operators, you must be an administrator of the project where the Cloud Pak for Data operators are installed. This project is identified by the ${PROJECT_CPD_OPS} environment variable.

When do you need to complete this task?: Complete this task if you want to remove a running instance of Watson Assistant from your environment.

Information you need to complete this task

Review the following information before you uninstall Watson Assistant:

Environment variables

The commands in this task use environment variables so that you can run the commands exactly as written.

If you don't have the script that defines the environment variables, see Setting up installation environment variables.
To use the environment variables from the script, you must source the environment variables before you run the commands in this task, for example:
```
source ./cpd_vars.sh
```

Installation location: Watson Assistant is installed in the same project (namespace) as the Cloud Pak for Data control plane. This project is identified by the ${PROJECT_CPD_INSTANCE} environment variable.

Procedure

Complete the following tasks to uninstall Watson Assistant:

Deleting service instances
Logging in to the cluster
Uninstalling the service
Cleaning up resources
Uninstalling the operator

Deleting service instances

Before you uninstall Watson Assistant, you must delete any service instances that are associated with Watson Assistant. This ensures that each instance releases the resources that it reserved.

Who needs to complete this task?: A user with the Manage service instances permission must complete this task.

When do you need to complete this task?: Complete this task before you uninstall Watson Assistant.

From the Cloud Pak for Data web client:

Log in to the web client as a user with sufficient permissions to complete the task.
From the menu, select Services > Instances.
Filter the list to show the assistant type.
Delete each assistant instance in the list.

Logging in to the cluster

To run cpd-cli manage commands, you must log in to the cluster.

To log in to the cluster:

Run the cpd-cli manage login-to-ocp command to log in to the cluster as a user with sufficient permissions to complete this task. For example:
```
cpd-cli manage login-to-ocp \
--username=${OCP_USERNAME} \
--password=${OCP_PASSWORD} \
--server=${OCP_URL}
```
Tip: The login-to-ocp command takes the same input as the oc login command. Run oc login --help for details.

Uninstalling the service

Who needs to complete this task?: You must be an administrator of the project where Watson Assistant is installed.

When do you need to complete this task?: Complete this task if you want to remove Watson Assistant from your deployment.
If you installed Watson Assistant in multiple projects, you must complete this task for each instance of Watson Assistant that you want to uninstall.

To uninstall the service:

Export the name of your Watson Assistant instance as an environment variable:

export INSTANCE=`oc get wa -n ${PROJECT_CPD_INSTANCE} |grep -v NAME| awk '{print $1}'`

Delete the custom resource for Watson Assistant.

cpd-cli manage delete-cr \
--components=watson_assistant \
--cpd_instance_ns=${PROJECT_CPD_INSTANCE}

Cleaning up resources

Who needs to complete this task?: You must be an administrator of the project where Watson Assistant is installed.

When do you need to complete this task?: Complete this task to clean up resources after you remove Watson Assistant from your deployment.

To delete remaining resources:

1. Check whether a deployment verification test exists:
```
oc get dvt -n ${PROJECT_CPD_INSTANCE}
```
2. If a deployment verification test exists, run the following command to delete it. When you run the command, replace {dvt-name} with the name of the test:
```
oc delete dvt {dvt-name} -n ${PROJECT_CPD_INSTANCE}
```

Delete the remaining Dynamic Workflow components:

oc delete deployment,secret -l release=${INSTANCE}-dwf -n ${PROJECT_CPD_INSTANCE}

1. Get the remaining persistent volume claims for your instance:
```
oc get pvc -n ${PROJECT_CPD_INSTANCE} |grep ${INSTANCE}-
```
2. Run the following command for each persistent volume claim to delete them one at a time. When you run the command, replace {pvc-name} with the name of the persistent volume claim:
```
oc delete pvc {pvc-name} -n ${PROJECT_CPD_INSTANCE}
```
1. Get the temporary patches for your instance:
```
oc get temporarypatch -n ${PROJECT_CPD_INSTANCE} |grep ${INSTANCE}-
```
2. Run the following command for each temporary patch to delete them one at a time. When you run the command, replace {temporarypatch-name} with the name of the temporary patch:
```
oc delete temporarypatch {temporarypatch-name} -n ${PROJECT_CPD_INSTANCE}
```
3. If the deletion gets hung up, press Ctrl+C to exit the command. Then, run the following command. When you run the command, replace {temporarypatch-name} with the name of the temporary patch:
```
oc patch temporarypatch {temporarypatch-name} -n ${PROJECT_CPD_INSTANCE} --type=merge -p '{"metadata": {"finalizers":null}}'
```
1. Get the remaining secrets for your instance:
```
oc get secret -n ${PROJECT_CPD_INSTANCE} |grep ${INSTANCE}-
```
2. Run the following command for each secret to delete them one at a time. When you run the command, replace {secret-name} with the name of the secret:
```
oc delete secret {secret-name} -n ${PROJECT_CPD_INSTANCE}
```
  Note: This step deletes all secrets, including Redis secrets. When Redis secrets are deleted, they are automatically re-created. This behavior is expected. Redis secrets are re-created in the following format:
```
wa-redis-dockercfg-xxxx
wa-redis-token-xxxx
```

Uninstalling the operator

Who needs to complete this task?: You must be an administrator with the appropriate permissions to manage OLM objects.

When do you need to complete this task?: Complete this task only if you want to completely remove the Watson Assistant software from the cluster.

To uninstall the operator and other OLM objects:

Delete the OLM objects for Watson Assistant:
```
cpd-cli manage delete-olm-artifacts \
--cpd_operator_ns=${PROJECT_CPD_OPS} \
--components=watson_assistant
```
- If the command succeeds, it returns [SUCCESS]... The delete-olm-artifacts command ran successfully.
- If the command fails, it returns [ERROR] and includes information about the cause of the failure.