I am running ovirt 3.4.3 on a Fedora 19 manager and have 1 node running Fedora 19 as well.  I am attempting to get cloud-init to work on a CentOS VM but I am running into issues.  I can see where in the log it mounts /dev/sr1 to /tmp/tmp_random_location and where it reads the meta-data.json and user_data from that location but after it unmounts it moves on to /var/lib/cloud/data/instance-id and returns "No instance datasource found! Likely bad things to come!"