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Chapter 9. Post-Upgrade Tasks

9.1. Changing the Cluster Compatibility Version

Red Hat Enterprise Virtualization clusters have a compatibility version. The cluster compatibility version indicates the features of Red Hat Enterprise Virtualization supported by all of the hosts in the cluster. The cluster compatibility is set according to the version of the least capable host operating system in the cluster.


To change the cluster compatibility version, you must have first updated all the hosts in your cluster to a level that supports your desired compatibility level.

Procedure 9.1. Changing the Cluster Compatibility Version

  1. From the Administration Portal, click the Clusters tab.
  2. Select the cluster to change from the list displayed.
  3. Click Edit.
  4. Change the Compatibility Version to the desired value.
  5. Click OK to open the Change Cluster Compatibility Version confirmation window.
  6. Click OK to confirm.


When changing the cluster compatibility version to 3.6, running or suspended virtual machines are marked with a symbol to denote the requirement for rebooting them as soon as possible after the cluster version upgrade.
You have updated the compatibility version of the cluster. Once you have updated the compatibility version of all clusters in a data center, you can then change the compatibility version of the data center itself.


Upgrading the compatibility will also upgrade all of the storage domains belonging to the data center. If you are upgrading the compatibility version from below 3.1 to a higher version, these storage domains will become unusable with versions older than 3.1.