7.6. Updating Nodes in Virtuozzo Storage Clusters¶

When updating Virtuozzo Storage cluster services running on Virtuozzo Hybrid Server nodes, follow these steps:

1. Ensure the cluster is fully healthy using vstorage -c <cluster_name> top.

2. Disable shaman.service on just one cluster node you want to update, as described in Disabling High Availability on Nodes.

3. Install the updates on the cluster node with yum update.

4. Reboot the updated node.

5. Reenable shaman.service once the node is back online:

   # systemctl enable shaman.service
   # systemctl start shaman.service
   # systemctl enable pdrs.service
   # systemctl start pdrs.service
   

6. Ensure the cluster is fully healthy using vstorage -c <cluster_name> top.

Repeat these steps for each cluster node by updating them individually. The cluster must be healthy before and after each node is updated.