17.8.2 HA resource testing

This subsection describes the general approach to testing the resources that you will place into the NNMi HA resource group.

This testing identifies hardware configuration problems. We recommend that you perform this testing before configuring NNMi to run under HA. Keep a record of the configuration values that generate positive results, and use these value when you perform full 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:

1. Start the HA cluster.

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

   • Virtual IP address for the HA cluster

   • Virtual IP address for each HA resource group

   None of these IP addresses can be in use 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:

   • Add the virtual IP address and corresponding virtual host name 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.

   • Trigger failover from the active cluster node to the passive cluster node to verify that the HA cluster fails over correctly.

   • Trigger failover from the new active cluster node to the new passive cluster node to verify failback.

   • If the resource group does not fail over correctly, log on to the active node and verify that the IP address is properly configured and accessible. Also verify that no firewall is blocking the IP address.

   • Trigger failover from the active cluster node to the passive cluster node to verify that the HA cluster fails over correctly.

   • Trigger failover from the new active cluster node to the new passive cluster node to verify failback.

   • If the resource group does not fail over correctly, log on to the active cluster node, and verify that the disk is mounted and accessible.

5. 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.

6. Remove the resource group from each node.

   • Remove the IP address entry.

   • Offline the resource group, and then remove the resource group from the node

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

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