Free Veritas Cluster Server (VCS) Simulator

Veritas Cluster Server (VCS) is a High Availability (HA) cluster software for Linux, UNIX and Windows systems.

Symantec (they have bought Veritas) offers a freely available VCS emulator software that lets you train your skills. You can also use the freely available documentation. Here is the Solaris Veritas Cluster Server (VCS) manual. Of course, you could just grab the trial and run 2 Solaris (or Linux) virtual machines in VMware Server