Install Windows Server HA (High Availability), Windows Server Failover Clustering (WSFC).
It needs more than 2 Nodes to configure WSFC and also they are in Active Directory Domain.
Furthermore, they need more than 2 shared storages, for Data and for Quorum.
Considering the above, this example is based on the environment like follows.
|
+----------------------+ | +----------------------+
| [ AD DS ] |10.0.0.100 | 10.0.0.110| [ iSCSI Target ] |
| fd3s.srv.world +-----------+-----------+ target.srv.world |
| | | | |
+----------------------+ | +----------------------+
|
+----------------------+ | +----------------------+
| [ Cluster Node#1 ] |10.0.0.101 | 10.0.0.102| [ Cluster Node#2 ] |
| rx-8.srv.world +-----------+-----------+ rx-9.srv.world |
| | | |
+----------------------+ +----------------------+
|