ssh fingerprint retrieval

Being able to create/delete vm's so quickly in the cloud is great, but it puts pressure on the ssh infrastructure in a way not origionally intended. That of ssh fingerprinting. Re-Fingerprinting happens very frequently in the cloud and infrequently normally.

It is a very manual process to discover what your new vm's ssh fingerprint is so you can safely login to it without being man-in-the-middle attacked. Most people don't go through the effort and just accept the risk without understanding it.

python-novaclient needs a command like:
nova get-ssh-fingerprint <instance-name>

That might work similary to the nova get-password command. The instance posts its fingerprint and nova allows the client to securely retrieve it. This prevents man-in-the-middle attacks between the cloud and the end user.