Bootstrap on openstack fails strict ssh host checking?

juju
1

I’ve bootstrapped on Openstack successfully in the past but now I am getting this error;

Waiting for address
Attempting to connect to 192.168.254.197:22
17:21:18 DEBUG juju.provider.common bootstrap.go:615 connection attempt for 192.168.254.197 failed: ssh: connect to host 192.168.254.197 port 22: Connection refused
17:21:23 DEBUG juju.provider.common bootstrap.go:615 connection attempt for 192.168.254.197 failed: ssh: connect to host 192.168.254.197 port 22: Connection refused
17:21:28 DEBUG juju.provider.common bootstrap.go:615 connection attempt for 192.168.254.197 failed: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
SHA256:vkOtKXme3G90Z+Wdapuy2oxrQFuBKryfktEsGIu2YMw.
Please contact your system administrator.
Add correct host key in /tmp/juju-known-hosts556720347 to get rid of this message.
Offending RSA key in /tmp/juju-known-hosts556720347:1
  remove with:
  ssh-keygen -f "/tmp/juju-known-hosts556720347" -R "192.168.254.197"
RSA host key for 192.168.254.197 has changed and you have requested strict checking.
Host key verification failed.

Full debug log here. Any clues please? Thanks in advance!

2

Update: this is a metadata problem in Openstack I think, not a juju problem. Instances are showing this log message;

[   56.803644] cloud-init[1759]: ci-info: no authorized SSH keys fingerprints found for user ubuntu.
3

as mentioned, the appropriate solution is to be sure to restart the metadata service on the compute machine (the hypervisor) and ensure the metadata port is correctly plummed into the instance.

both of these things would require an openstack administrator to aid in