102 lines
3.4 KiB
Python
102 lines
3.4 KiB
Python
#!/usr/bin/python
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# Copyright 2015 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Collectd plugin for getting hypervisor statistics from Nova
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import collectd
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import openstack
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PLUGIN_NAME = 'hypervisor_stats'
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INTERVAL = openstack.INTERVAL
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class HypervisorStatsPlugin(openstack.CollectdPlugin):
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""" Class to report the statistics on Nova hypervisors."""
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VALUE_MAP = {
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'current_workload': 'running_tasks',
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'running_vms': 'running_instances',
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'local_gb_used': 'used_disk_GB',
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'free_disk_gb': 'free_disk_GB',
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'memory_mb_used': 'used_ram_MB',
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'free_ram_mb': 'free_ram_MB',
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'vcpus_used': 'used_vcpus',
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}
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def config_callback(self, config):
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super(HypervisorStatsPlugin, self).config_callback(config)
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for node in config.children:
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if node.key == 'CpuAllocationRatio':
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self.extra_config['cpu_ratio'] = float(node.values[0])
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if 'cpu_ratio' not in self.extra_config:
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self.logger.warning('CpuAllocationRatio parameter not set')
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def dispatch_value(self, name, value, host=None):
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v = collectd.Values(
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plugin=PLUGIN_NAME,
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type='gauge',
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type_instance=name,
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interval=INTERVAL,
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# w/a for https://github.com/collectd/collectd/issues/716
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meta={'0': True},
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values=[value]
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)
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if host:
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v.host = host
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v.dispatch()
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@openstack.read_callback_wrapper
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def read_callback(self):
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r = self.get('nova', 'os-hypervisors/detail')
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if not r:
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self.logger.warning("Could not get hypervisor statistics")
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return
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total_stats = {v: 0 for v in self.VALUE_MAP.values()}
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total_stats['free_vcpus'] = 0
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hypervisor_stats = r.json().get('hypervisors', [])
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for stats in hypervisor_stats:
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# remove domain name and keep only the hostname portion
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host = stats['hypervisor_hostname'].split('.')[0]
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for k, v in self.VALUE_MAP.iteritems():
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self.dispatch_value(v, stats.get(k, 0), host)
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total_stats[v] += stats.get(k, 0)
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if 'cpu_ratio' in self.extra_config:
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free = (int(self.extra_config['cpu_ratio'] *
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stats.get('vcpus', 0))) - stats.get('vcpus_used', 0)
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self.dispatch_value('free_vcpus', free, host)
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total_stats['free_vcpus'] += free
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# Dispatch the global metrics
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for k, v in total_stats.iteritems():
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self.dispatch_value('total_{}'.format(k), v)
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plugin = HypervisorStatsPlugin(collectd)
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def config_callback(conf):
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plugin.config_callback(conf)
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def notification_callback(notification):
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plugin.notification_callback(notification)
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def read_callback():
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plugin.read_callback()
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collectd.register_config(config_callback)
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collectd.register_notification(notification_callback)
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collectd.register_read(read_callback, INTERVAL)
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