The HA master uses network heartbeats to monitor the liveliness of the slave nodes. It is, however, sometimes possible that a slave node, though isolated from the heartbeat (management) network, could still be running and providing all of the necessary resources to the virtual machines that are running on them. To verify the existence of such a scenario, HA has another type of heartbeat method, called datastore heartbeating. 

In this recipe, we will learn how to configure heartbeat datastores.