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#!/usr/bin/env python
# Copyright (C) 2012:
# Thibault Cohen, thibault.cohen@savoirfairelinux.com
#
# This file is part of Shinken.
#
# Shinken is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Shinken is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Shinken. If not, see <http://www.gnu.org/licenses/>.
"""
This program use libvirt to put host parent-child relations in a json one so it
can be loaded in hot_dependencies_arbiter module
"""
import timeit
import os
import sys
import optparse
import signal
import libvirt
class TimeoutException(Exception):
pass
# Try to load json (2.5 and higer) or simplejson if failed (python2.4)
try:
import json
except ImportError:
# For old Python version, load simple json
try:
import simplejson as json
except ImportError:
raise SystemExit("Error: you need the json or simplejson module "
"for this script")
VERSION = '0.1'
def main(uris, output_file, ignore):
def timeout_handler(signum, frame):
raise TimeoutException()
ignored_doms = []
r = []
if ignore:
ignored_doms = ignore.split(",")
for uri in uris.split(","):
signal.signal(signal.SIGALRM, timeout_handler)
signal.alarm(10) # triger alarm in 10 seconds
try:
conn = libvirt.openReadOnly(uri)
except libvirt.libvirtError, e:
print "Libvirt connection error: `%s'" % e.message.replace("\r", "")
print "Let's try next URI"
continue
except TimeoutException:
print "Libvirt Request timeout"
print "Let's try next URI"
continue
except Exception, e:
print "Unknown Error: %s" % str(e)
print "Let's try next URI..."
continue
hypervisor = conn.getHostname()
# List all VM (stopped and started)
for dom in [conn.lookupByName(name) for name in conn.listDefinedDomains()]\
+ [conn.lookupByID(vmid) for vmid in conn.listDomainsID()]:
domain_name = dom.name()
if domain_name in ignored_doms:
continue
v = (('host', hypervisor.strip()), ('host', domain_name.strip()))
r.append(v)
r = set(r)
r = list(r)
jsonmappingfile = open(output_file, 'w')
try:
json.dump(r, jsonmappingfile)
finally:
jsonmappingfile.close()
if __name__ == "__main__":
parser = optparse.OptionParser(
version="Shinken libvirt mapping to json mapping %s" % VERSION)
parser.add_option("-o", "--output", dest='output_file',
default='/tmp/libvirt_mapping_file.json',
help="Path of the generated json mapping file.\n"
"Default: /tmp/libvirt_mapping_file.json")
parser.add_option("-u", "--uris", dest='uris',
help="Libvirt URIS separated by comma")
parser.add_option("-i", "--ignore", dest='ignore',
default=None,
help="Ignore hosts (separated by comma)\n"
"Default: None")
opts, args = parser.parse_args()
if args:
parser.error("does not take any positional arguments")
if opts.uris is None:
print "At least one URI is mandatory"
sys.exit(2)
main(**vars(opts))
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