About virtual machine availability options


About virtual machine availability options
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While application availability is very important for KVM users, virtual machine availability is equally important. Virtual machine availability can be provided by adopting Cluster Server (VCS) in the host. VCS in this case monitors the virtual machines as a resource.

See Table: Comparison of availability options.

The virtual machine availability use case is supported for the following Linux virtualization technologies:

Red Hat Enterprise Linux (RHEL) KVM
Red Hat Enterprise Virtualization (RHEV)
SUSE Linux Enterprise Server (SLES) KVM

For setup information for VCS for RHEL and SUSE:

See Installing and configuring Cluster Server in a kernel-based virtual machine (KVM) environment.

Note:

For virtual machine high availability and failover capabilities the virtual machine image must be on the shared storage accessible to all the nodes of the VCS cluster.

Note:

You can also use the cluster functionality of Storage Foundation HA or Storage Foundation Cluster File System HA if you need storage management capabilities in addition to virtual machine availability for your KVM host.