Disabling Platform High-Availability

Prerequisites

  • Required access rights: Platform Administrator

  • All hosts must be online.

    If you want to disable HA protection while the Shadow Controller or Arbiter host is offline, contact Hewlett Packard Enterprise Support for assistance. The Support team will perform some manual operations to allow the management service to ignore the offline host and allow you to proceed with disabling HA Protection.

About this task

Disabling platform HA protection has the following effects:

  • The cluster IP address is disabled; you must sign in using the Controller IP address or a Gateway.
  • The HPE Ezmeral Runtime Enterprise deployment is no longer protected against Controller host failure.

Procedure

  1. Enter Lockdown mode as described in Lockdown Mode.
  2. On the Controlers & HA screen, clear the Enable HA check box.

    A confirmation popup appears. Click OK to confirm.

  3. Click Submit to begin disabling HA protection.

    You will be signed out automatically.

  4. Sign in to the web interface using the Controller IP address.

    The HA tab will display the message HA disable in progress. Disabling HA might require up to 30 minutes to complete. If you want more information about the HA disable process, click the Details button to open the HPE HA Disable Details dialog.

  5. After the HA disable process completes, exit site lockdown as described in Lockdown Mode.

Disabling HA can be rejected for one of several reasons:

  • Shadow Controller failure: Normally, disabling HA protection will delete the database replicas on the Shadow Controller and Arbiter hosts. If the Shadow Controller host is offline due to a hardware failure, then database deletion will fail.

    If disabling HA fails because the Shadow Controller is offline, contact Hewlett Packard Enterprise Support for assistance.

    When the faulty hardware is replaced and HA protection is re-enabled, the original Arbiter host must be redesignated as the Arbiter, and the new Shadow Controller host must use the same IP address as the previous Shadow Controller host.

  • Arbiter failure: Normally, disabling HA protection will delete the database replicas on the Shadow Controller and Arbiter hosts. If the Arbiter host is offline due to a hardware failure, then database deletion will fail.

    If disabling HA fails because the Arbiter is offline, contact Hewlett Packard Enterprise Support for assistance.

    When the faulty hardware is replaced and HA protection is re-enabled, the original Shadow Controller host must be re-designated as the Shadow Controller, and the new Arbiter host must use the same IP address as the previous Arbiter host.