7.6. Updating Nodes in Virtuozzo Storage Clusters¶
Important
If nodes in the cluster run different versions (updates) of Virtuozzo Hybrid Server, make sure to create new cluster services on the nodes running the newest version of Virtuozzo Hybrid Server.
When updating Virtuozzo Storage cluster services running on Virtuozzo Hybrid Server nodes, follow these steps:
Make sure that the cluster is fully healthy, using
vstorage -c <cluster_name> top.Update Virtuozzo Storage services on just one cluster node with
yum update.Reboot the updated node.
Again make sure that the cluster is fully healthy, using
vstorage -c <cluster_name> top.
Repeat these steps for each cluster node, updating them one at a time. The cluster must be healthy before and after each node is updated.
Note
After upgrading a node in a mixed cluster, you cannot migrate VEs (virtual machines and containers) created in datastores with encoding EC 3+2, 5+2, 7+2, or 17+3 from VHS 7.5 Update 4 to VHS 7.5 Update 3. However, the migration of VEs created in local datastores and datastores with a 3-replica and 2-replica data redundancy mode is available. A mixed cluster is not supported and exists during the upgrade only.