Chapter 7: Installing Additional Hosts to a Self-Hosted Environment

Additional self-hosted engine hosts are added in the same way as a regular host, with an additional step to deploy the host as a self-hosted engine host. The shared storage domain is automatically detected and the host can be used as a failover host to host the Manager virtual machine when required. You can also attach regular hosts to a self-hosted engine environment, but they cannot be used to host the Manager virtual machine. It is highly recommended to have at least two self-hosted engine hosts to ensure the Manager virtual machine is highly available. Additional hosts can also be added using the REST API.

Prerequisites

  • For a oVirt Node-based self-hosted engine environment, you must have prepared a freshly installed oVirt Node system on a physical host. See "oVirt Nodes" in the Installation Guide.

  • If you are reusing a self-hosted engine host, remove its existing self-hosted engine configuration. See the Removing a Host from a Self-Hosted Engine Environment section in Chapter 5: Maintenance and Upgrading Resources.

Adding an Additional Self-Hosted Engine Host

  1. In the Administration Portal, click the Hosts resource tab.

  2. Click New.

    For information on additional host settings, see "Explanation of Settings and Controls in the New Host and Edit Host Windows" in the Administration Guide.

  3. Use the drop-down list to select the Data Center and Host Cluster for the new host.

  4. Enter the Name and the Address of the new host. The standard SSH port, port 22, is auto-filled in the SSH Port field.

  5. Select an authentication method to use for the Manager to access the host.

    • Enter the root user's password to use password authentication.

    • Alternatively, copy the key displayed in the SSH PublicKey field to /root/.ssh/authorized_keys on the host to use public key authentication.

  6. Optionally, configure power management, where the host has a supported power management card. For information on power management configuration, see "Host Power Management Settings Explained" in the Administration Guide.

  7. Click the Hosted Engine sub-tab.

  8. Select the Deploy radio button.

  9. Click OK.

Note: To add the ability to deploy the Self-Hosted Engine on an existing host, you must select Installation and choose Reinstall on the host and repeat the above steps.

Prev: Chapter 6: Backing up and Restoring an EL-Based Self-Hosted Environment
Next: Chapter 8: Migrating Databases