[CentOS] KVM HA

>
> My question is: Is this even possible? All the documentation for HA that I've found appears to not
> do this. Am I missing something?

You can use oVirt for that (www.ovirt.org).
For that small number of hosts, you would probably want to use the
"hosted engine" architecture to co-locate the management engine on the
same hypervisor hosts.
It is included by the CentOS virtualization SIG, so on CentOS it is
just a couple of 'yum install's away...

HTH,

-- 
Barak Korren
bkorren at redhat.com
RHEV-CI Team