

Libvirt provides an abstraction from specific versions and hypervisors and encapsulates some workarounds and best practices. While qemu has a command line interface and a monitor to interact with running guests those is rarely used that way for other means than development purposes. In that case it utilizes the virtualization technology of the hardware to virtualize guests. Mostly it is not used as emulator but as virtualizer in collaboration with KVM kernel components. Qemu is a machine emulator that can run operating systems and programs for one machine on a different machine. Pacemaker - Fence Agents - Supportability.Pacemaker - Resource Agents - Supportability.
