Review High Availability Cluster Deployment Scenarios

Catalyst Center's implementation of HA is described in the Cisco Catalyst Center High Availability Guide. We recommend that you first review this information and then determine whether you want to deploy HA in your production environment. If you decide to continue, complete these tasks:

  1. Complete the deployment procedure that is appropriate for your network:

  2. Activate HA on your Catalyst Center cluster.

  3. See Additional HA deployment considerations and make any additional telemetry or wireless controller configurations that are necessary.

New HA deployment

To install a new HA cluster, complete these steps:

Procedure

Step 1

Configure the first installed appliance as the primary node:

Step 2

Configure the second and third appliances in the cluster:

Existing HA deployment of the primary node with standard interface configurations

To deploy an existing HA cluster, where the primary node uses the required interface cable configurations, complete these steps.

Procedure

Step 1

Upgrade the primary node to the latest 2.3.7.x release of Catalyst Center.

For information about upgrading your current release of Catalyst Center, see the Cisco Catalyst Center Upgrade Guide.

Step 2

Confirm that you are using the required interface cable configurations on the primary node.

See Interface cable connections.

Step 3

Update the virtual IP address (if the virtual IP address is not yet added).

See Reconfigure the appliance using the Configuration wizard.

Step 4

Configure the second and third appliances in the cluster:

Step 5

Check the GlusterFS size:

  1. Contact the Cisco TAC to obtain a challenge token.

  2. Open a restricted shell and run the sudo du -h /data/maglev/srv/maglev-system/glusterfs/mnt/bricks/default_brick/ | tail -1 | awk '{print $1}' command.

If the GlusterFS file system size is larger than 150 GB, complete the steps described in Existing HA deployment of primary node with nonstandard interface configurations.

Existing HA deployment of primary node with nonstandard interface configurations

To deploy an existing HA cluster where the primary node uses nonstandard interface configurations, complete these steps.

Procedure

Step 1

Upgrade the primary node to the latest 2.3.7.x release of Catalyst Center.

For information about upgrading your current release of Catalyst Center, see the Cisco Catalyst Center Upgrade Guide.

Step 2

Create a backup of the remote repository.

See the "Backup and Restore" chapter in the Cisco Catalyst Center Administrator Guide.

Step 3

Reimage the primary node with the required interface cable configuration.

See Interface cable connections and Install the Catalyst Center ISO image. Ensure that the VIP has been configured correctly on the primary node.

Step 4

Install the same set of packages on the primary node that you selected during the backup.

Step 5

Using the backup file that you created in Step 2, restore the remote repository's data.

Step 6

Configure the second and third appliances in the cluster.

Activate HA

Catalyst Center's implementation of HA is described in the Cisco Catalyst Center High Availability Guide. Determine if HA is suitable for your production environment after reviewing the information. If you decide to continue, complete these steps for deployment:

  1. From the main menu, choose System > Settings > System Configuration > High Availability.

  2. Click Activate High Availability.

After you click Activate High Availability, Catalyst Center enters into maintenance mode. In this mode, Catalyst Center is unavailable until the redistribution of services completes. You must take this into account when scheduling an HA deployment.


Note

Catalyst Center goes into maintenance mode every time you restore the database, upgrade your system (not a package upgrade), and activate HA (as described).

Additional HA deployment considerations

For an existing HA deployment, these additional configurations must be made.

Telemetry

If you enabled telemetry for a device without enabling the VIP, complete these steps:

Procedure

Step 1

Use the sudo maglev-config update command to update the cluster VIP.

Step 2

Disable telemetry on the device:

  1. From the Catalyst Center home page, select Network Telemetry from the Tools area.

    The Network Telemetry window appears.

  2. Click the Site View tab.

  3. Check the check box of the device on which you want to disable telemetry, and then choose Actions > Disable Telemetry.

Step 3

Reenable telemetry using the profile associated with the device previously.

Wireless controller

You must update the wireless controllers in your network with the new VIP of Catalyst Center.