#!/usr/bin/env python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# tails. You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

def inventory_docker_container_cpu(info):
    if info:
        return [(None, {})]


def check_docker_container_cpu(_no_item, params, info):
    if not params:
        params = {}

    ticks = {}
    for line in info:
        if line[0] == "cpu":
            ticks["total"] = sum(map(int, line[1:]))
        else:
            ticks[line[0]] = int(line[1])

    this_time = time.time()
    node_delta = get_rate("node_total", this_time, ticks["total"])
    container_delta = get_rate("container", this_time, ticks["user"] + ticks["system"])

    if not node_delta or not container_delta:
        raise MKCounterWrapped("Too short time difference since last check")

    cpu_usage = (container_delta / node_delta) * ticks["num_cpus"] * 100.0

    return check_cpu_util(cpu_usage, params)


check_info["docker_container_cpu"] = {
    "check_function":       check_docker_container_cpu,
    "inventory_function":   inventory_docker_container_cpu,
    "service_description":  "CPU utilization",
    "has_perfdata":         True,
    "includes":             ["cpu_util.include"],
    "group":                "cpu_utilization_os",
}
