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#!/usr/bin/python
# vim: set fileencoding=utf-8 :
#
# Munin plugin to show the percent of cputime of libvirt managed virtual
# machines
#
# Copyright 2008 Guido Guenther <agx@sigxcpu.org>
#
# License: GPLv2
#
# depends: python-libvirt
#
#%# capabilities=autoconf
#%# family=contrib
import re, sys, os
import libvirt
def canon(name):
return re.sub(r"[^a-zA-Z0-9_]", "_", name)
def print_config(uri, stack):
"""print the plugin config, determine the domains"""
print """graph_title Virtual Domain Cpu Time
graph_vlabel CPU Time percentage
graph_category Virtual Machines
graph_info This graph shows the cpu time percentage of each virtual machine
graph_args --base 1000 -l 0
total_pc.type DERIVE
total_pc.graph no
total_pc.min 0
total_pc.max 100
total_pc.label total
total_pc.info cputime used by all virtual machines
total_pc.warning 90
total_pc.critical 95"""
draw = [ "LINE1", "AREA"][stack]
conn = libvirt.openReadOnly(uri)
ids = conn.listDomainsID()
for id in ids:
dom = conn.lookupByID(id)
name = dom.name()
print "%s_cputime.label %s" % (canon(name), name)
print "%s_cputime.type DERIVE" % canon(name)
print "%s_cputime.min 0" % canon(name)
print "%s_cputime.draw %s" % (canon(name), draw)
if draw == "AREA":
draw = "STACK"
def fetch_values(uri):
conn = libvirt.openReadOnly(uri)
ids = conn.listDomainsID()
total = 0
processors = float(conn.getInfo()[2])
for id in ids:
dom = conn.lookupByID(id)
name = dom.name()
cputime = float(dom.info()[4])
cputime_percentage = 1.0e-7 * cputime / processors
total += cputime_percentage
print "%s_cputime.value %.0f" % (canon(name), cputime_percentage)
print "total_pc.value %.0f" % total
def main(sys):
uri = os.getenv("uri", "qemu:///system")
stack = [ False, True ][os.getenv("stack") == "1"]
if len(sys) > 1:
if sys[1] in [ 'autoconf', 'detect' ]:
if libvirt.openReadOnly(uri):
print "yes"
return 0
else:
print "no"
return 1
elif sys[1] == 'config':
print_config(uri, stack)
return 0
fetch_values(uri)
return 0
if __name__ == "__main__":
sys.exit(main(sys.argv))
# vim:et:ts=4:sw=4:
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