Comment 9 for bug 1226310

Thinking of how we'd solve this in Ironic, I don't believe that fixing this with a CONF option is appropriate, for a few reasons.

1) this is really a property of the host on which the (virtual) node being managed exists, not a global setting for all nodes. Imagine having the seed vm on an Ubuntu host, some nodes on a Fedora host and some nodes on an Ubuntu host. With a CONF setting, you couldn't use VMs on both the Fedora and Ubuntu hosts.

2) because this is really a property of the host on the other end of the SSH connection, it should be configured properly there.

3) this solution only applies to virsh/libvirt, and would need separate CONF options for any additional virt types that the SSH driver supported (eg, vbox and vmware), whereas, again, a per-node setting would be a general solution.