NetBackup clustering in virtual environment
The NetBackup primary servers running on virtual machines can be clustered using supported clustering technologies in similar way as that of physical machines clustering. For the general statement of support for NetBackup in a clustered virtual environment, refer following technote.
https://www.veritas.com/content/support/en_US/doc/NB_70_80_VE
You can install products like Storage Foundation HA on virtual machines in the same way as you install those on physical machines. However it is different than using VMware HA or vMotion because these two work at the virtual machine container level rather than the application level within the virtual machine.
Note:
Using NetBackup within VM high availability, replication or transfer solutions is supported but not qualified by Veritas (Examples of such solutions are vSphere HA, host-based replication, vMotion, and Storage vMotion (but not limited to VMware)). As a virtualized application, NetBackup is unaware of being deployed within a VM, and support for such operations is provided by the hypervisor vendor.