Get KVM guest CPU Usage for Mackerel

kvm_guest_virttop.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
import commands
import datetime

unix_time = datetime.datetime.today().strftime('%s')

retval = commands.getstatusoutput( "virt-top -b --stream -n 2 -d 1" )
if retval[0] != 0:
    sys.exit( -1 )

top_count = 0
top_list = retval[1].split( "\n" )
for top_data in top_list:
    if top_data.find( "virt-top time" ) >= 0:
        top_count += 1
        continue
    if top_count != 2:
        continue
    if top_data == "":
        continue
    top_data_list = top_data.strip().split()
    if top_data_list[0] == "ID":
        continue
    print "%s.%s.%s\t%s\t%s" % ( "kvm.guest", "cpu", top_data_list[9], top_data_list[6], unix_time )

mackerel-agent.conf

# Please append this lines to your config file.
[plugin.metrics.kvm_guest_cpu]
command = "/usr/local/bin/kvm_guest_virttop.py"
type = "metric"