An essential step is to enable password less authentication for the eucalyptus user on all the controllers. Repeat the following operation for each walrus (WS3) and cluster (CC) controller servers: 1. On the target (CC or WS3) Controller, temporarily set a password for the ''eucalyptus'' user: {{{ sudo passwd eucalyptus }}} 1. Then, on the Cloud Controller (CLC): {{{ sudo -u eucalyptus ssh-copy-id -i ~eucalyptus/.ssh/id_rsa.pub eucalyptus@ }}} 1. You can now remove the password of the ''eucalyptus'' account on the target: {{{ sudo passwd -d eucalyptus }}}