0e26faeb69
Enabled H306 in tox.ini and corrected the import order. Change-Id: If77984e8c62b0ec0cfb3d068e9c1b0d4d7c3583d
149 lines
4.6 KiB
Python
149 lines
4.6 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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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 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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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, instance):
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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 Exception as err:
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LOG.warning('Ignoring instance %s: %s',
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instance_name, err)
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LOG.exception(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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