Migrating an RDQM configuration from RHEL 7 to RHEL 8

If you upgrade from RHEL 7 to RHEL 8, create a new Pacemaker cluster and migrate your replicated data queue managers (RDQMs) to the new cluster.

About this task

We must set up a separate RHEL 8 cluster and migrate each RDQM HA queue manager to it, using a backup and restore procedure. If we use a floating IP address to connect to an RDQM queue manager then we must recreate that floating IP address on the RHEL 8 cluster.

Procedure

1. Configure three RHEL 8 nodes.
2. Install IBM MQ Advanced on each of them, see Installing IBM MQ Advanced for Multiplatforms.
3. Configure a new Pacemaker cluster to create a new HA group, see Defining the Pacemaker cluster (HA group).
4. Recreate each queue manager that we want to from the existing RHEL 7 HA Group, see Create an HA RDQM.
5. For each RDQM queue manager to be moved, complete the following actions:
   1. End the RDQM queue manager on the RHEL 8 node.
   2. End the RDQM queue manager on the RHEL 7 node.
   3. Take a backup of the RDQM queue manager, its config and its data as required, on the RHEL 7 node, see Backing up and restoring IBM MQ queue manager data.
   4. Restore the backup on the RHEL 8 node.

6. Start the RDQM queue manager on the RHEL 8 node.
7. If required, configure the floating IP address on the RHEL 8 HA group, see Create and deleting a floating IP address.
8. After you confirm that the RDQM queue manager is working correctly on the RHEL 8 HA group, delete the queue manager from the RHEL 7 HA group, see Delete an HA RDQM.

Parent topic: Migrating IBM MQ