.. note::
    Before running the Ansible bootstrap playbook, it is important that you
    ensure that controller-0 server time is synchronized correctly. Run the following
    command:

    .. code-block:: bash

       # check the current server time
       $ date

       # if the current server time is not correct, update with NTP

             # first add nameserver for DNS resolution
             $ echo "nameserver 8.8.8.8" >> /etc/resolv.conf
             $ echo "nameserver 8.8.4.4" >> /etc/resolv.conf

             # run ntpdate
             $ sudo ntpdate 0.pool.ntp.org 1.pool.ntp.org