Chapter 4. Migration of information from a deployment on Red Hat OpenShift Container Platform version 3

Procedure

1. Ensure that no web clients and no client applications are connected to any elements of the old and new deployment, including Business Central and KIE Servers.
2. Create an empty temporary directory and change into it.
3. Using the oc command, log in to the Red Hat OpenShift Container Platform version 3 infrastructure and switch to the project containing the old deployment.

4. To view the pod names in the old deployment, run the following command:

   oc get pods

   Find the Business Central pod. The name of this pod includes rhdmcentr. In a high-availability deployment, you can use any of the Business Central pods.

5. Use the oc command to copy the the .niogit repository and the Maven repository from the pod to the local machine, for example:

   oc cp myapp-rhdmcentr-5-689mw:/opt/kie/data/.niogit .niogit
   oc cp myapp-rhdmcentr-5-689mw:/opt/kie/data/maven-repository maven-repository

6. Using the oc command, log in to the Red Hat OpenShift Container Platform version 4 infrastructure and switch to the project containing the new deployment.

7. To view the pod names in the new deployment, run the following command:

   oc get pods

   Find the Business Central pod. The name of this pod includes rhdmcentr. In a high-availability deployment, you can use any of the Business Central pods.

8. Use the oc command to copy the the .niogit repository and the Maven repository from the local machine to the pod, for example:

   oc cp .niogit myappnew-rhdmcentr-abd24:/opt/kie/data/.niogit
   oc cp maven-repository myappnew-rhdmcentr-abd24:/opt/kie/data/maven-repository