python-munin (http://samuelks.com/python-munin/) を使って、 munin plugin を書いてみた

gistfile1.py

#!/usr/bin/python

# python-munin (http://samuelks.com/python-munin/) を使って、
# cpu 使用率の plugin を書いてみた

import commands
from munin import MuninPlugin

class CPUPlugin(MuninPlugin):
    title = "cpu usage (test)"
    args = "--base 1000 -l 0"
    vlabel = "cpu usage"
    scale  = False
    category = "system"

    @property
    def fields(self):
        return [
            ("kernel", dict(
                label = "system",
                draw = "AREA",
                min = "0",
                type = "DERIVE",
            )),
            ("user", dict(
                label = "user",
                draw = "STACK",
                min = "0",
                type = "DERIVE",
            )),
            ("wait", dict(
                label = "wait",
                draw = "STACK",
                min = "0",
                type = "DERIVE",
            )),
            ("idle", dict(
                label = "idle",
                draw = "STACK",
                min = "0",
                type = "DERIVE",
            )),
        ]

    def execute(self):
        stats = commands.getoutput(
            "kstat -p -c misc -m cpu_stat -s '/^(user|kernel|wait|idle)$/'")

        values = {'idle':0, 'kernel':0, 'user':0, 'wait':0 }

        for i in  stats.splitlines():
            key, value = i.split(':')[-1].split('\t')
            values[key] += int(value)

        return values

if __name__ == "__main__":
    CPUPlugin().run()