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You can migrate two existing Operation Centers (OC) or standalone appliances to form a failover pair. Ensure that both appliances are running versions NetMRI 7.1.1 or later. To form a collector failover, migrate the existing collector to NetMRI 7.1.2 or later releases.

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.
  • For an HA pair, provision three IP addresses: One for the primary appliance, another one for the secondary appliance, and a virtual IP address shared between the failover pair.
  • If you are using the network replication method to connect the appliances, you must connect the systems over a local network and two replication IPs must be acquired on the same subnet. You must also select a TCP port for the replication traffic.

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:

Note

For the new partition scheme, configure three nodes—one with an OC license and two others with Stand Alone licenses—with the same version and licenses, and reset the admin password in the GUI to match the other system. Then proceed with the last three steps from the list above.
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