Enable vSphere HA
You can enable vSphere HA during a cluster creation or by modifying an existing cluster. To enable vSphere HA on an existing cluster, select your cluster from the inventory, go to Manage > Settings > vSphere HA and click the Edit button on the right:
The Edit Cluster Settings dialog box opens. Check the Turn ON vSphere HA checkbox:
You can configure the following HA settings:
- Host Monitoring – enables the vSphere HA master to respond to host or virtual machine failures and management network isolation.
- Admission Control – used to guarantee that capacity exists in the cluster to handle host failure situations.
- VM Monitoring – used to control the monitoring of VMs.
- Datastore Heartbeating – allows the master host to better determine the true state of the slave host. If datastore heartbeating from the slave host stops, the master considers the host failed.
- Advanced Options – used to configure some advanced parameters for the HA cluster, such as the address to ping to determine if a host is isolated from the network, the minumum amount of CPU sufficent for any VM to be usable, etc.