You can deploy up to three instances of Device Manager to create a high availability pair, which is also called a cluster. You configure one Device Manager instance as the primary role in the cluster and the other Device Manager instances as the secondary role in the cluster. In this deployment, the primary Device Manager listens for requests, and serves user requests. The secondary Device Manager synchronizes its data with the data on the primary. The two instances of Device Manager work as an active-passive pair, in which only one instance of Device Manager is active at a time.
If the current primary Device Manager stops responding for any reason, the current secondary Device Manager takes over and becomes the primary. The new primary Device Manager begins to serve user requests.
Device Manager in a cluster configuration requires a network load balancer to create a high availability pair as well as to distribute the load between Device Manager servers.
You need to configure the following:
After you install Device Manager and configure the initial settings, there are some additional configuration steps. These include:
You can also use the PostGRE SQL database for high availablity. If you use this database, you need to run a utility to import database information to Device Manager.