Instance migration fails with the following error on the source host.
973 INFO nova.compute.manager [req-<rUUID> firstname.lastname@example.org admin] [instance: <UUID>] Setting instance back to ACTIVE after: Instance rollback performed due to: Resize error: not able to execute ssh command: Unexpected error while running command.
Command: ssh -o BatchMode=yes A.B.C.D mkdir -p /pf9/instances/<UUID>
Exit code: 255
Stderr: u"Warning: Permanently added 'A.B.C.D' (ECDSA) to the list of known hosts.\r\nPermission denied (publickey,gssapi-keyex,gssapi-with-mic,password).\r\n"
Platform9 Managed OpenStack - v3.6.0 and Higher
Password-less authentication is not configured between source and destination hosts.
Set up password-less authentication between the current host and the new host as OpenStack requires a password-less authentication to copy the instance and the associated files to the destination host.