def osd_tree(conn, cluster):
    """
    Check the status of an OSD. Make sure all are up and in

    What good output would look like::

        {
            "epoch": 8,
            "num_osds": 1,
            "num_up_osds": 1,
            "num_in_osds": "1",
            "full": "false",
            "nearfull": "false"
        }

    Note how the booleans are actually strings, so we need to take that into
    account and fix it before returning the dictionary. Issue #8108
    """
    ceph_executable = system.executable_path(conn, 'ceph')
    command = [
        ceph_executable,
        '--cluster={cluster}'.format(cluster=cluster),
        'osd',
        'tree',
        '--format=json',
    ]

    out, err, code = remoto.process.check(
        conn,
        command,
    )

    try:
        loaded_json = json.loads(b''.join(out).decode('utf-8'))
        # convert boolean strings to actual booleans because
        # --format=json fails to do this properly
        for k, v in loaded_json.items():
            if v == 'true':
                loaded_json[k] = True
            elif v == 'false':
                loaded_json[k] = False
        return loaded_json
    except ValueError:
        return {}
Check the status of an OSD. Make sure all are up and in

    What good output would look like::

        {
            "epoch": 8,
            "num_osds": 1,
            "num_up_osds": 1,
            "num_in_osds": "1",
            "full": "false",
            "nearfull": "false"
        }

    Note how the booleans are actually strings, so we need to take that into
    account and fix it before returning the dictionary. Issue #8108