Recover a Cluster

When a cluster is broken because of a node failure, or the failed Secondary node is in Waiting status, you can rebuild the cluster to recover the Primary and Secondary node status.

If the Primary and Secondary nodes lose communication with one another, the Secondary node will assume the role of the Primary node. When connectivity resumes, you may have two Primary nodes. It is impossible to recover the cluster with two Primary nodes. Recover works only when there is one Primary and one Waiting.

To recover a cluster with two Primary nodes, you have two options. Log into each Primary node, delete the cluster in each, and then create the cluster again. Or, log into one of the Primary nodes and restart it so that it changes to the Waiting status, then follow the instructions to recover a cluster.

• To recover a cluster:

1. Choose Administration > Cluster Configuration.
2. Click the Recovery tab, and you can either have the cluster automatically rebuilt at the specified time or rebuild the cluster immediately.
   • Click Rebuild Now to immediately recover the cluster.
   • Select the Enable Automatic Rebuild checkbox, and specify the time to rebuild the cluster in the From Time and To Time fields. Click Update to save the changes.

     Note: If the clustered CC-SG units do not share the same time zone, when the Primary node failure occurs, and the Secondary node becomes the new Primary node, the time specified for Automatic Rebuild still follows the time zone of the old Primary node.