def beacon(config):
    '''
    Monitor the disk usage of the minion

    Specify thresholds for each disk and only emit a beacon if any of them are
    exceeded.

    .. code-block:: yaml

        beacons:
          diskusage:
            - /: 63%
            - /mnt/nfs: 50%

    Windows drives must be quoted to avoid yaml syntax errors

    .. code-block:: yaml

        beacons:
          diskusage:
            -  interval: 120
            - 'c:\': 90%
            - 'd:\': 50%

    '''
    ret = []
    for diskusage in config:
        mount = diskusage.keys()[0]

        try:
            _current_usage = psutil.disk_usage(mount)
        except __HOLE__:
            # Ensure a valid mount point
            log.error('{0} is not a valid mount point, skipping.'.format(mount))
            continue

        current_usage = _current_usage.percent
        monitor_usage = diskusage[mount]
        if '%' in monitor_usage:
            monitor_usage = re.sub('%', '', monitor_usage)
        monitor_usage = float(monitor_usage)
        if current_usage >= monitor_usage:
            ret.append({'diskusage': current_usage, 'mount': mount})
    return ret
dataset/ETHPy150Open saltstack/salt/salt/beacons/diskusage.py/beacon