159 lines
6.1 KiB
Python
159 lines
6.1 KiB
Python
#!/usr/bin/python
|
|
# Copyright 2015 Mirantis, Inc.
|
|
#
|
|
# 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.
|
|
#
|
|
# Collectd plugin for getting hypervisor statistics from Nova
|
|
import collectd
|
|
|
|
import collectd_openstack as openstack
|
|
|
|
PLUGIN_NAME = 'hypervisor_stats'
|
|
INTERVAL = openstack.INTERVAL
|
|
|
|
|
|
class HypervisorStatsPlugin(openstack.CollectdPlugin):
|
|
""" Class to report the statistics on Nova hypervisors."""
|
|
VALUE_MAP = {
|
|
'current_workload': 'running_tasks',
|
|
'running_vms': 'running_instances',
|
|
'local_gb_used': 'used_disk_GB',
|
|
'free_disk_gb': 'free_disk_GB',
|
|
'memory_mb_used': 'used_ram_MB',
|
|
'free_ram_mb': 'free_ram_MB',
|
|
'vcpus_used': 'used_vcpus',
|
|
}
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(HypervisorStatsPlugin, self).__init__(*args, **kwargs)
|
|
self.plugin = PLUGIN_NAME
|
|
self.interval = INTERVAL
|
|
|
|
def config_callback(self, config):
|
|
super(HypervisorStatsPlugin, self).config_callback(config)
|
|
for node in config.children:
|
|
if node.key == 'CpuAllocationRatio':
|
|
self.extra_config['cpu_ratio'] = float(node.values[0])
|
|
if 'cpu_ratio' not in self.extra_config:
|
|
self.logger.warning('CpuAllocationRatio parameter not set')
|
|
|
|
def itermetrics(self):
|
|
nova_aggregates = {}
|
|
r = self.get('nova', 'os-aggregates')
|
|
if not r:
|
|
self.logger.warning("Could not get nova aggregates")
|
|
else:
|
|
aggregates_list = r.json().get('aggregates', [])
|
|
for agg in aggregates_list:
|
|
nova_aggregates[agg['name']] = {
|
|
'id': agg['id'],
|
|
'hosts': agg['hosts'],
|
|
'metrics': {'free_vcpus': 0},
|
|
}
|
|
nova_aggregates[agg['name']]['metrics'].update(
|
|
{v: 0 for v in self.VALUE_MAP.values()}
|
|
)
|
|
|
|
r = self.get('nova', 'os-hypervisors/detail')
|
|
if not r:
|
|
self.logger.warning("Could not get hypervisor statistics")
|
|
return
|
|
|
|
total_stats = {v: 0 for v in self.VALUE_MAP.values()}
|
|
total_stats['free_vcpus'] = 0
|
|
hypervisor_stats = r.json().get('hypervisors', [])
|
|
for stats in hypervisor_stats:
|
|
# remove domain name and keep only the hostname portion
|
|
host = stats['hypervisor_hostname'].split('.')[0]
|
|
for k, v in self.VALUE_MAP.iteritems():
|
|
m_val = stats.get(k, 0)
|
|
yield {
|
|
'type_instance': v,
|
|
'values': m_val,
|
|
'meta': {'host': host},
|
|
}
|
|
total_stats[v] += m_val
|
|
for agg in nova_aggregates.keys():
|
|
agg_hosts = nova_aggregates[agg]['hosts']
|
|
if stats['hypervisor_hostname'] in agg_hosts:
|
|
nova_aggregates[agg]['metrics'][v] += m_val
|
|
if 'cpu_ratio' in self.extra_config:
|
|
m_vcpus = stats.get('vcpus', 0)
|
|
m_vcpus_used = stats.get('vcpus_used', 0)
|
|
free = (int(self.extra_config['cpu_ratio'] *
|
|
m_vcpus)) - m_vcpus_used
|
|
yield {
|
|
'type_instance': 'free_vcpus',
|
|
'values': free,
|
|
'meta': {'host': host},
|
|
}
|
|
total_stats['free_vcpus'] += free
|
|
for agg in nova_aggregates.keys():
|
|
agg_hosts = nova_aggregates[agg]['hosts']
|
|
if stats['hypervisor_hostname'] in agg_hosts:
|
|
free = ((int(self.extra_config['cpu_ratio'] *
|
|
m_vcpus)) -
|
|
m_vcpus_used)
|
|
nova_aggregates[agg]['metrics']['free_vcpus'] += free
|
|
|
|
# Dispatch the aggregate metrics
|
|
for agg in nova_aggregates.keys():
|
|
agg_id = nova_aggregates[agg]['id']
|
|
agg_total_free_ram = (
|
|
nova_aggregates[agg]['metrics']['free_ram_MB'] +
|
|
nova_aggregates[agg]['metrics']['used_ram_MB']
|
|
)
|
|
# Only emit metric when value is > 0
|
|
# If this is not the case, (for instance when no host
|
|
# in aggregate), this requires the corresponding alarms to
|
|
# have a 'skip' no_data_policy, so as not to be triggered
|
|
if agg_total_free_ram > 0:
|
|
nova_aggregates[agg]['metrics']['free_ram_percent'] = round(
|
|
(100.0 * nova_aggregates[agg]['metrics']['free_ram_MB']) /
|
|
agg_total_free_ram,
|
|
2)
|
|
for k, v in nova_aggregates[agg]['metrics'].iteritems():
|
|
yield {
|
|
'type_instance': 'aggregate_{}'.format(k),
|
|
'values': v,
|
|
'meta': {
|
|
'aggregate': agg,
|
|
'aggregate_id': agg_id,
|
|
}
|
|
}
|
|
# Dispatch the global metrics
|
|
for k, v in total_stats.iteritems():
|
|
yield {
|
|
'type_instance': 'total_{}'.format(k),
|
|
'values': v,
|
|
}
|
|
|
|
plugin = HypervisorStatsPlugin(collectd, PLUGIN_NAME,
|
|
disable_check_metric=True)
|
|
|
|
|
|
def config_callback(conf):
|
|
plugin.config_callback(conf)
|
|
|
|
|
|
def notification_callback(notification):
|
|
plugin.notification_callback(notification)
|
|
|
|
|
|
def read_callback():
|
|
plugin.conditional_read_callback()
|
|
|
|
collectd.register_config(config_callback)
|
|
collectd.register_notification(notification_callback)
|
|
collectd.register_read(read_callback, INTERVAL)
|