Chapter 13. Upgrading a Self-Hosted Engine from 4.1 to Red Hat Virtualization 4.3
Upgrading a self-hosted engine environment from version 4.1 to 4.2 involves the following steps:
- Make sure you meet the prerequisites, including enabling the correct repositories
- Place the environment in global maintenance mode
- Update the 4.1 Manager to the latest version of 4.1
- Upgrade the Manager from 4.1 to 4.2
- Upgrade the Manager from 4.2 to 4.3
- Disable global maintenance mode
- Update the self-hosted engine nodes, and any standard hosts
- Update the compatibility version of the clusters
- Reboot any running or suspended virtual machines to update their configuration
- Update the compatibility version of the data centers
- If you installed the technology preview version of Open Virtual Network (OVN) in 4.1, update the OVN provider’s networking plugin
- Replace SHA-1 certificates with SHA-256 certificates
- 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.
- Ensure the hosts have the correct repositories enabled. For the list of required repositories, see Enabling the Red Hat Virtualization Host Repository for RHVH, or Enabling the Red Hat Enterprise Linux host Repositories for RHEL host.
- Ensure the Manager has the correct repositories enabled. For the list of required repositories, see Subscribing to the Required Entitlements for Red Hat Virtualization 4.1.