Chapter 12. Upgrading a Self-Hosted Engine from 4.0 to Red Hat Virtualization 4.3

The 4.0 compatibility version is not supported after Red Hat Virtualization 4.2. Therefore, when upgrading from Red Hat Virtualization 4.0 you must update the cluster and data center compatibility versions to at least 4.1 before upgrading the Manager from 4.2 to 4.3, then update the compatibility versions again after completing the Manager upgrades.

You must also update the hosts before updating the compatibility versions, but only need to do so once. The host repositories stay the same across Red Hat Virtualization versions, so the hosts will already be upgraded to the latest version after a single update.

Upgrading your environment from 4.0 to 4.3 involves the following steps:

  1. Make sure you meet the prerequisites, including enabling the correct repositories
  2. Place the environment in global maintenance mode
  3. Update the 4.0 Manager to the latest version of 4.0
  4. Upgrade the Manager from 4.0 to 4.1
  5. Upgrade the Manager from 4.1 to 4.2
  6. Disable global maintenance mode
  7. Update the hosts
  8. Update the compatibility version of the clusters to 4.2
  9. Reboot any running or suspended virtual machines to update their configuration to 4.2
  10. Update the compatibility version of the data centers to 4.2
  11. Place the environment in global maintenance mode
  12. Upgrade the Manager from 4.2 to 4.3
  13. Disable global maintenance mode
  14. Update the compatibility version of the clusters
  15. Reboot any running or suspended virtual machines to update their configuration to the latest version
  16. Update the compatibility version of the data centers
  17. Replace SHA-1 certificates with SHA-256 certificates

12.1. Prerequisites

  • Plan for any necessary virtual machine downtime. After you update the clusters' compatibility versions during the upgrade, a new hardware configuration is automatically applied to each virtual machine once it reboots. You must reboot any running or suspended virtual machines as soon as possible to apply the configuration changes.
  • Ensure your environment meets the requirements for Red Hat Virtualization 4.3. For a complete list of prerequisites, see the Planning and Prerequisites Guide.