I have found some issues while trying to install two nodes with centos
6.6, oVirt 3.4 and cluster functionality.
1 - If you enable the gluster service in a cluster, when you install the
hosts, the installation fails because it tries to install the gluster
packages from Centos repository and a dependency problem is reported.
Workaround: Install the package yum-plugin-priorities and set priority=1
in the /etc/yum.repos.d/ovirt-3.4-dependencies.repo, section glusterfs-epel.
2 - If you reboot the host, the service glusterd doesn't start at init,
and host becomes non operational.
Workaround: Manually set glusterd to start at boot, using for example
ntsysv.
Regards
Federico