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

Additional self-hosted engine nodes are added in the same way as a regular host, with an additional step to deploy the host as a self-hosted engine node. The shared storage domain is automatically detected and the node 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 host the Manager virtual machine. Red Hat highly recommends having at least two self-hosted engine nodes to ensure the Manager virtual machine is highly available. Additional hosts can also be added using the REST API. See Hosts in the REST API Guide.

Prerequisites

Procedure 7.1. Adding an Additional Self-Hosted Engine Node

  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.