I installed OpenStack using
openstack-installer's autopilot option.
After starting an instance, if I want to resize it (i.e. change its flavor), this produces an error, the same if I try it with the instance turned on or off. The error log says something like this:
Failed to launch instance "datanode02": Please try again later [Error: Unexpected error while running command. Command: ssh 10.222.221.57 mkdir -p /var/lib/nova/instances/07e5308c-00c9-4314-92f5-fdb26a5a7f98 Exit code: 255 Stdout: u'' Stderr: u'Host key verification failed.\r\n'].
Clearly it's a key problem. The weird thing is that I'm able to create, turn on, turn off (all from Openstack Dashboard), log into those servers (directly with the key), etc, but I can't resize the instance, nor log into the console through Openstack Dashboard (probably due the same error).
My question is: Where I have to solve that problem? At the MAAS server? At Landscape's? At Landscape's bootstrap's? Where?