Monitor CPU temperature in Mackerel (using kernel driver coretemp)

mackerel-plugin-coretemp.py

#!/usr/bin/env python3
# -*- encoding: utf-8 -*-
from datetime import datetime
import glob
import json
import os
import re
import sys
import time

def GetTemp():
    dict = {}

    for path_label in glob.glob('/sys/devices/platform/coretemp.0/hwmon/hwmon0/temp*_label'):
        f_label = open(path_label)
        label_raw = f_label.read()
        label = re.compile(r'\W+', re.UNICODE).sub('', label_raw)
        f_label.close()

        path_input = path_label.replace('_label', '_input')
        f_input = open(path_input)
        input = int(f_input.read())
        f_input.close()

        dict[label] = input

    return dict


def DefGraph():
    metadata = {
        'graphs': {
            'temp.cpu': {
                'label': 'CPU Core Temperature',
                'unit': 'float',
                'metrics': [{
                    'name': '*',
                    'label': '%1',
                    'stacked': False
                }]
            }
        }
    }

    print("# mackerel-agent-plugin")
    print(json.dumps(metadata))


if __name__ == "__main__":
    if os.environ.get('MACKEREL_AGENT_PLUGIN_META', '')  == '1':
        DefGraph()
        sys.exit(0)

    time = int(time.mktime(datetime.now().timetuple()))
    data = GetTemp()

    for label, input in sorted(data.items()):
        print("temp.cpu.%s\t%.2f\t%d" % (label, input / 1000, time))