def get_doc():
    """Get documentation of this resource

    :return: rst string
    :rtype: str
    """
    return """
    The ``grafana`` model contains information to manage Grafana panels for the monitored
    system performance data.

    The Alignak backend will use those information to create/update Grafana panels for each
    managed timeseries. A Grafana dashboard is created automatically for each host in the
    monitored system. A panel is created automatically in this dashboard for each metric
    of the concerned host.
    """
