Returns a best guess for the hostname registered with OpenStack for this host

def get_my_hostname(self, split_hostname_on_first_period=False):
        """
        Returns a best guess for the hostname registered with OpenStack for this host
        """

        hostname = self.init_config.get("os_host") or self.hostname
        if split_hostname_on_first_period:
            hostname = hostname.split('.')[0]

        return hostname