Comment 3 for bug 901594

I've marked bug 932998 as a dupe of this bug. Some additional info:

 * That bug was filed after an upgrade to essex release for a private cloud ("Canonistack") that Andrew and others maintain, so the bug represents an actual user finding the change unsatisfactory.
 * Essex level of openstack started filling the 'public_dns_name' and 'private_dns_name' fields in a EC2 DescribeInstances response with the hostname values. Previously, the response would contain an ipv4 value. The result is that a user *used* to be able to use the output of 'euca-describe-instances' to get to an instance, but now, they cannot, as the hostname returned is not resolvable.
 * Ubuntu's euca2ools has a '--ipv4' patch that allows https://code.launchpad.net/~smoser/euca2ools/describe-ipv4/+merge/84881