You can configure vSphere HA to designate specific hosts as the failover hosts.

With the Specify Failover Hosts admission control policy, when a host fails, vSphere HA attempts to restart its virtual machines on one of the specified failover hosts. If this is not possible, for example the failover hosts have failed or have insufficient resources, then vSphere HA attempts to restart those virtual machines on other hosts in the cluster.

To ensure that spare capacity is available on a failover host, you are prevented from powering on virtual machines or using vMotion to migrate virtual machines to a failover host. Also, DRS does not use a failover host for load balancing.

Note

If you use the Specify Failover Hosts admission control policy and designate multiple failover hosts, DRS does not load balance failover hosts and VM-VM affinity rules are not supported.

The Current Failover Hosts appear in the vSphere HA section of the cluster's Summary tab in the vSphere Client. The status icon next to each host can be green, yellow, or red.

Green. The host is connected, not in maintenance mode, and has no vSphere HA errors. No powered-on virtual machines reside on the host.

Yellow. The host is connected, not in maintenance mode, and has no vSphere HA errors. However, powered-on virtual machines reside on the host.

Red. The host is disconnected, in maintenance mode, or has vSphere HA errors.