The thing that bothers me is why the deploy script returned status 0 even though yum failed:

2017-10-31 11:18:14,496::ssh.py::ssh::58::lago.ssh::DEBUG::Running 2fed0ea0 on lago-basic-suite-4-1-host-0: bash -s < "#!/bin/bash -xe
yum -y install ovirt-host
rm -rf /dev/shm/*.rpm /dev/shm/yum
"
2017-10-31 11:18:16,121::ssh.py::ssh::81::lago.ssh::DEBUG::Command 2fed0ea0 on lago-basic-suite-4-1-host-0 returned with 0