263 lines
8.8 KiB
Python
263 lines
8.8 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2012 eNovance <licensing@enovance.com>
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# Copyright © 2012 Red Hat, Inc
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#
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# Author: Julien Danjou <julien@danjou.info>
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# Author: Eoghan Glynn <eglynn@redhat.com>
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import abc
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import collections
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import six
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from ceilometer.compute import plugin
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from ceilometer.compute.pollsters import util
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from ceilometer.compute.virt import inspector as virt_inspector
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from ceilometer.openstack.common.gettextutils import _
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from ceilometer.openstack.common import log
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from ceilometer import sample
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LOG = log.getLogger(__name__)
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DiskIOData = collections.namedtuple(
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'DiskIOData',
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'r_bytes r_requests w_bytes w_requests',
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)
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@six.add_metaclass(abc.ABCMeta)
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class _Base(plugin.ComputePollster):
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DISKIO_USAGE_MESSAGE = ' '.join(["DISKIO USAGE:",
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"%s %s:",
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"read-requests=%d",
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"read-bytes=%d",
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"write-requests=%d",
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"write-bytes=%d",
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"errors=%d",
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])
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CACHE_KEY_DISK = 'diskio'
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def _populate_cache(self, inspector, cache, instance, instance_name):
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i_cache = cache.setdefault(self.CACHE_KEY_DISK, {})
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if instance_name not in i_cache:
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r_bytes = 0
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r_requests = 0
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w_bytes = 0
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w_requests = 0
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for disk, info in inspector.inspect_disks(instance_name):
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LOG.info(self.DISKIO_USAGE_MESSAGE,
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instance, disk.device, info.read_requests,
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info.read_bytes, info.write_requests,
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info.write_bytes, info.errors)
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r_bytes += info.read_bytes
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r_requests += info.read_requests
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w_bytes += info.write_bytes
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w_requests += info.write_requests
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i_cache[instance_name] = DiskIOData(
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r_bytes=r_bytes,
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r_requests=r_requests,
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w_bytes=w_bytes,
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w_requests=w_requests,
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)
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return i_cache[instance_name]
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@abc.abstractmethod
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def _get_sample(instance, c_data):
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"""Return one Sample."""
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def get_samples(self, manager, cache, resources):
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for instance in resources:
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instance_name = util.instance_name(instance)
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try:
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c_data = self._populate_cache(
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manager.inspector,
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cache,
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instance,
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instance_name,
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)
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yield self._get_sample(instance, c_data)
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except virt_inspector.InstanceNotFoundException as err:
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# Instance was deleted while getting samples. Ignore it.
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LOG.debug(_('Exception while getting samples %s'), err)
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except NotImplementedError:
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# Selected inspector does not implement this pollster.
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LOG.debug(_('%(inspector)s does not provide data for '
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' %(pollster)s'),
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{'inspector': manager.inspector.__class__.__name__,
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'pollster': self.__class__.__name__})
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except Exception as err:
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LOG.exception(_('Ignoring instance %(name)s: %(error)s'),
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{'name': instance_name, 'error': err})
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class ReadRequestsPollster(_Base):
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@staticmethod
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def _get_sample(instance, c_data):
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return util.make_sample_from_instance(
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instance,
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name='disk.read.requests',
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type=sample.TYPE_CUMULATIVE,
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unit='request',
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volume=c_data.r_requests,
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)
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class ReadBytesPollster(_Base):
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@staticmethod
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def _get_sample(instance, c_data):
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return util.make_sample_from_instance(
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instance,
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name='disk.read.bytes',
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type=sample.TYPE_CUMULATIVE,
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unit='B',
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volume=c_data.r_bytes,
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)
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class WriteRequestsPollster(_Base):
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@staticmethod
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def _get_sample(instance, c_data):
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return util.make_sample_from_instance(
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instance,
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name='disk.write.requests',
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type=sample.TYPE_CUMULATIVE,
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unit='request',
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volume=c_data.w_requests,
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)
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class WriteBytesPollster(_Base):
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@staticmethod
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def _get_sample(instance, c_data):
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return util.make_sample_from_instance(
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instance,
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name='disk.write.bytes',
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type=sample.TYPE_CUMULATIVE,
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unit='B',
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volume=c_data.w_bytes,
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)
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@six.add_metaclass(abc.ABCMeta)
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class _DiskRatesPollsterBase(plugin.ComputePollster):
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CACHE_KEY_DISK_RATE = 'diskio-rate'
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def _populate_cache(self, inspector, cache, instance):
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i_cache = cache.setdefault(self.CACHE_KEY_DISK_RATE, {})
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if instance.id not in i_cache:
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r_bytes_rate = 0
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r_requests_rate = 0
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w_bytes_rate = 0
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w_requests_rate = 0
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disk_rates = inspector.inspect_disk_rates(
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instance, self._inspection_duration)
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for disk, info in disk_rates:
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r_bytes_rate += info.read_bytes_rate
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r_requests_rate += info.read_requests_rate
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w_bytes_rate += info.write_bytes_rate
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w_requests_rate += info.write_requests_rate
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i_cache[instance.id] = virt_inspector.DiskRateStats(
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r_bytes_rate,
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r_requests_rate,
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w_bytes_rate,
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w_requests_rate
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)
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return i_cache[instance.id]
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@abc.abstractmethod
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def _get_sample(self, instance, disk_rates_info):
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"""Return one Sample."""
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def get_samples(self, manager, cache, resources):
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self._inspection_duration = self._record_poll_time()
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for instance in resources:
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try:
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disk_rates_info = self._populate_cache(
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manager.inspector,
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cache,
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instance,
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)
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yield self._get_sample(instance, disk_rates_info)
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except virt_inspector.InstanceNotFoundException as err:
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# Instance was deleted while getting samples. Ignore it.
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LOG.debug(_('Exception while getting samples %s'), err)
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except NotImplementedError:
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# Selected inspector does not implement this pollster.
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LOG.debug(_('%(inspector)s does not provide data for '
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' %(pollster)s'),
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{'inspector': manager.inspector.__class__.__name__,
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'pollster': self.__class__.__name__})
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except Exception as err:
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instance_name = util.instance_name(instance)
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LOG.exception(_('Ignoring instance %(name)s: %(error)s'),
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{'name': instance_name, 'error': err})
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class ReadBytesRatePollster(_DiskRatesPollsterBase):
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def _get_sample(self, instance, disk_rates_info):
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return util.make_sample_from_instance(
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instance,
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name='disk.read.bytes.rate',
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type=sample.TYPE_GAUGE,
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unit='B/s',
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volume=disk_rates_info.read_bytes_rate,
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)
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class ReadRequestsRatePollster(_DiskRatesPollsterBase):
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def _get_sample(self, instance, disk_rates_info):
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return util.make_sample_from_instance(
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instance,
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name='disk.read.requests.rate',
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type=sample.TYPE_GAUGE,
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unit='requests/s',
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volume=disk_rates_info.read_requests_rate,
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)
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class WriteBytesRatePollster(_DiskRatesPollsterBase):
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def _get_sample(self, instance, disk_rates_info):
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return util.make_sample_from_instance(
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instance,
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name='disk.write.bytes.rate',
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type=sample.TYPE_GAUGE,
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unit='B/s',
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volume=disk_rates_info.write_bytes_rate,
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)
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class WriteRequestsRatePollster(_DiskRatesPollsterBase):
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def _get_sample(self, instance, disk_rates_info):
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return util.make_sample_from_instance(
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instance,
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name='disk.write.requests.rate',
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type=sample.TYPE_GAUGE,
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unit='requests/s',
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volume=disk_rates_info.write_requests_rate,
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)
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