About designating the HPE Synergy Image Streamer primary appliance

The primary appliance has the following characteristics:

  • It is the cluster on which the Image Streamer user interface runs. Each cluster is comprised of an Image Streamer appliance pair for high availability in mission critical deployments.

  • It provides the interface for managing artifacts and detailed status and maintenance of Image Streamer appliances.

  • It coordinates deployment as directed by an associated server profile on HPE OneView. The server profile configuration controls deployment.

The primary appliance is automatically designated when the Image Streamer deployment server is added, though any Image Streamer appliance can be selected as the primary appliance. Changing the primary does not disrupt server access to OS volumes.

All Image Streamer appliances not designated as the primary are considered secondary appliances. A secondary appliance hosts and serves the operating system volumes for the compute modules in its logical enclosure and acts as a backup in case the primary appliance fails. If there are appliance-related issues or a need to remove or decommission the primary appliance, another Image Streamer can be selected as primary cluster by editing the deployment server.

OS deployment is not possible until the deployment server is edited to select a primary. The new primary requires time to reconfigure and take control of the group of appliances. During this time servers continue to have uninterrupted access to OS volumes.

Before the primary is physically removed, a new primary should be selected. If the primary is removed before selecting a new primary, it will not be possible to manage artifacts and OS deployment will fail. Once a new primary is selected, normal operation will resume.

Where Image Streamer appliances are present, a logical enclosure must be configured to include the deployment appliance. The number of clusters possible is limited by the maximum number of enclosures that can be managed by HPE OneView in a multi-frame configuration.

For instructions on how to change a primary deployment appliance, see HPE OneView Help