Instance migration fails with the error reported in log /var/log/pf9/ostackhost.log on the source host:
2019-10-22 01:47:38.973 INFO nova.compute.manager [req-7c8e3d84-0c5c-4171-b51d-28ab20aa6ea2 email@example.com admin] [instance: 3985e37a-910e-4a2a-be83-1b44d03adffe] 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 10.54.57.11 mkdir -p /pf9/instances/3985e37a-910e-4a2a-be83-1b44d03adffe
Exit code: 255
Stderr: u"Warning: Permanently added '10.54.57.11' (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.