"/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 4907,
in migrate_disk_and_power_off\n utils.execute(\'ssh\', dest, \'mkdir\', \'-p\', inst_base)\n', '
File "/usr/lib/python2.6/site-packages/nova/utils.py", line 165, in execute\n return processutils.execute(*cmd, **kwargs)\n', '
File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 193, in execute\n cmd=\' \'.join(cmd))\n',
"ProcessExecutionError: Unexpected error while running command.\nCommand: ssh 10.1.15.44
mkdir -p /var/lib/nova/instances/5d5ced81-6fb1-4028-97cd-686e450d1bab\nExit code: 255\nStdout: ''\nStderr:
'Host key verification failed.\\r\\n'\n"]
This is due to a bug in nova as told in below bug report which can be solved by enabling password less authentication between the compute and controller node's nova user .
https://bugzilla.redhat.com/show_bug.cgi?id=975014#c3
By default the nova user does not have a shell so we need to enable the shell and do steps to enable password less authentication between all the server .
Enable shell for nova user
In all the controller and compute server’s enable nova user.
sed -i "s/\/var\/lib\/nova:\/sbin\/nologin/\/var\/lib\/nova:\/bin\/bash/g" /etc/passwd
cat /etc/passwd |grep nova
nova:x:162:162:OpenStack Nova Daemons:/var/lib/nova:/bin/bash
Enable password less authentication
Between all the compute and controller nodes create password less authenticatioin for user nova.
su - nova
ssh-keygen
ssh-copy-id