78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
# Copyright 2014 Mirantis, Inc.
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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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from oslo_utils import timeutils
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import six
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from ceilometer.agent import plugin_base
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from ceilometer.compute.virt import inspector as virt_inspector
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@six.add_metaclass(abc.ABCMeta)
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class BaseComputePollster(plugin_base.PollsterBase):
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def setup_environment(self):
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super(BaseComputePollster, self).setup_environment()
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# propagate exception from check_sanity
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self.inspector.check_sanity()
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@property
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def inspector(self):
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try:
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inspector = self._inspector
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except AttributeError:
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inspector = virt_inspector.get_hypervisor_inspector()
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BaseComputePollster._inspector = inspector
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return inspector
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@property
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def default_discovery(self):
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return 'local_instances'
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@staticmethod
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def _populate_cache_create(_i_cache, _instance, _inspector,
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_DiskData, _inspector_attr, _stats_attr):
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"""Settings and return cache."""
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if _instance.id not in _i_cache:
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_data = 0
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_per_device_data = {}
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disk_rates = getattr(_inspector, _inspector_attr)(_instance)
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for disk, stats in disk_rates:
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_data += getattr(stats, _stats_attr)
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_per_device_data[disk.device] = (
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getattr(stats, _stats_attr))
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_per_disk_data = {
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_stats_attr: _per_device_data
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}
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_i_cache[_instance.id] = _DiskData(
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_data,
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_per_disk_data
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)
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return _i_cache[_instance.id]
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def _record_poll_time(self):
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"""Method records current time as the poll time.
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:return: time in seconds since the last poll time was recorded
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"""
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current_time = timeutils.utcnow()
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duration = None
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if hasattr(self, '_last_poll_time'):
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duration = timeutils.delta_seconds(self._last_poll_time,
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current_time)
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self._last_poll_time = current_time
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return duration
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