Migrating Existing Systems as Failover Pairs

You can migrate two existing Operation Centers (OC) or standalone appliances to form a failover pair.

The following are the pre-requisites for migrating existing systems as a failover pair:

• Two supported NetMRI appliances with licenses installed. You can choose an existing appliance and a second appliance of the same model.

• The management IP addresses of the two nodes that create the Automatic Failover pair are set to use the same subnet.

The example further in this section describes the migration of an Operation Center with two collectors to an HA Operation Center with two HA collectors. It uses the following conventions:

• A — Nodes of the existing devices.

• B — Nodes to be added to existing devices as paired.

The steps required to migrate existing systems as failover pairs depend on whether your appliances use the old or new partition scheme. If your appliances use the old partition scheme, you need to additionally prepare them. To determine what partition scheme an appliance has, run the show diskusage command from the administrative shell and search for the “/drbd0” substring. If the substring is present, the appliance runs with the new scheme.

To migrate existing systems to form a failover pair, perform the steps described in the following sections:

• Preparing Secondary Appliances (Old Partition Scheme)

• Preparing the Existing Operation Center Node (Old Partition Scheme)

• Preparing the Existing Collectors Nodes (Old Partition Scheme)

• Configuring a Failover Pair

• Reconfiguring the Operation Center HA Pair

• Reconfiguring the Collector HA Pair