openstack/deb-ceilometer
Code Issues Proposed changes

Periodically fetch for disk io stats

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Change-Id: Id48337a598e8941d9e1793ad552251369ef3954f
Signed-off-by: Julien Danjou <julien.danjou@enovance.com>
This commit is contained in:
Julien Danjou 2012-05-11 12:13:11 +02:00
parent 6393825cf6
commit 11a8416190
2 changed files with 64 additions and 0 deletions
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39
bin/ceilometer-nova-compute Executable file
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@ -0,0 +1,39 @@
#!/usr/bin/env python
# -*- encoding: utf-8 -*-
#
# Copyright © 2012 eNovance <licensing@enovance.com>
#
# Author: Julien Danjou <julien@danjou.info>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import eventlet
eventlet.monkey_patch()
import sys
from nova import flags
from nova import log as logging
from nova import service
from nova import utils
if __name__ == '__main__':
utils.default_flagfile()
flags.FLAGS(sys.argv)
logging.setup()
utils.monkey_patch()
server = service.Service.create(binary='ceilometer-nova-compute',
topic='ceilometer',
manager='ceilometer.nova.manager.ComputeManager')
service.serve(server)
service.wait()

25
ceilometer/nova/manager.py
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@ -16,9 +16,12 @@
# License for the specific language governing permissions and limitations
# under the License.
from lxml import etree
from nova import log as logging
from nova import manager
from nova import flags
import nova.virt.connection
# Import rabbit_notifier to register notification_topics flag
import nova.notifier.rabbit_notifier
@ -40,3 +43,25 @@ class InstanceManager(manager.Manager):
def _on_notification(self, body):
event_type = body.get('event_type')
LOG.info('NOTIFICATION: %s', event_type)
class ComputeManager(manager.Manager):
def _get_disks(self, conn, instance):
"""Get disks of an instance, only used to bypass bug#998089."""
domain = conn._conn.lookupByName(instance)
tree = etree.fromstring(domain.XMLDesc(0))
return filter(bool,
[target.get('dev') \
for target in tree.findall('devices/disk/target')])
@manager.periodic_task
def _fetch_diskio(self, context):
if FLAGS.connection_type == 'libvirt':
conn = nova.virt.connection.get_connection(read_only=True)
for instance in self.db.instance_get_all_by_host(context,
self.host):
# TODO(jd) This does not work see bug#998089
# for disk in conn.get_disks(instance.name):
for disk in self._get_disks(conn, instance.name):
stats = conn.block_stats(instance.name, disk)
LOG.info("DISKIO USAGE: %s %s: read-requests=%d read-bytes=%d write-requests=%d write-bytes=%d errors=%d" % (instance, disk, stats[0], stats[1], stats[2], stats[3], stats[4]))