HA Resource Testing

This section describes the general approach for testing the resources that you will place into the NNMi HA resource group. This testing identifies hardware configuration problems. It is recommended to perform this testing before configuring NNMi to run under High Availability (HA). Note the configuration values that generate positive results, and use these value when performing the complete configuration of the NNMi HA resource group.

For specific details regarding any of the commands listed here, see the most recent documentation for your HA product.

To test HA resources, follow these steps:

1. If necessary, start the HA cluster.

2. (Windows only) Verify that the following virtual IP addresses have been defined for the HA cluster:

   • A virtual IP address for the HA cluster
   • A virtual IP address for each HA resource group

   Each of these IP addresses should not be used elsewhere.

3. Add an HA resource group to the HA cluster.

   Use a non-production name, such as test, for this HA resource group.

4. Test the connection to the HA resource group:

   1. Add the virtual IP address and corresponding virtual hostname for the resource group as a resource to the HA resource group.

      Use the values that you will later associate with the NNMi HA resource group.

   2. Fail over from the active cluster node to the passive cluster node to verify that the HA cluster correctly fails over.
   3. Fail over from the new active cluster node to the new passive cluster node to verify failback.
   4. If the resource group does not fail over correctly, log on to the active node, and then verify that the IP address is properly configured and accessible. Also verify that no firewall blocks the IP address.v
5. Configure the shared disk as described in Configuring a SAN or a Physically Connected Disk.

6. Test the connection to the shared disk:

   1. Add the shared disk as a resource to the HA resource group as described in Moving the Shared Disk into the NNMiHA Resource Group.
   2. Fail over from the active cluster node to the passive cluster node to verify that the HA cluster correctly fails over.
   3. Fail over from the new active cluster node to the new passive cluster node to verify failback.
   4. If the resource group does not fail over correctly, log on to the active node, and then verify that the disk is mounted and available.
7. Keep a record of the commands and inputs that you used to configure the shared disk. You might need this information when configuring the NNMi HA resource group.

8. Remove the resource group from each node:

   1. Remove the IP address entry.
   2. Offline the resource group, and then remove resource group from the node.

   At this point, you can use the NNMi-provided tools to configure NNMi to run under HA.