def get_crm_leader(service, resource=None):
    if not resource:
        resource = 'res_.*_vip'
    leader = set()
    for unit in mojo_utils.get_juju_units(service):
        crm_out = juju_utils.remote_run(unit, 'sudo crm status')
        for line in crm_out.splitlines():
            line = line.lstrip()
            if re.match(resource, line):
                leader.add(line.split()[-1])
    if len(leader) != 1:
        raise Exception('Unexpected leader count: ' + str(len(leader)))
    return leader.pop().split('-')[-1]
def check_dns_entry_in_bind(ip, record_name, juju_status=None):
    """Check that record for ip address in bind if a bind
       server is available.

    @param ip: str IP address to lookup
    @param record_name: str record name
    @param juju_status: dict Current juju status
    """
    bind_units = mojo_utils.get_juju_units('designate-bind')

    for unit in bind_units:
        addr = mojo_utils.get_juju_unit_ip(unit)
        logging.info("Checking {} is {} against {} ({})".format(
            record_name, ip, unit, addr))
        check_dns_record_exists(addr, record_name, ip, retry_count=6)