161 lines
6.2 KiB
Python
161 lines
6.2 KiB
Python
# Copyright 2013 Cloudbase Solutions Srl
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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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"""Implementation of Inspector abstraction for Hyper-V"""
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import collections
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import functools
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import sys
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from os_win import exceptions as os_win_exc
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from os_win import utilsfactory
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from oslo_utils import units
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import six
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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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def convert_exceptions(exception_map, yields=True):
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expected_exceptions = tuple(exception_map.keys())
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def _reraise_exception(exc):
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# exception might be a subclass of an expected exception.
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for expected in expected_exceptions:
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if isinstance(exc, expected):
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raised_exception = exception_map[expected]
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break
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exc_info = sys.exc_info()
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# NOTE(claudiub): Python 3 raises the exception object given as
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# the second argument in six.reraise.
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# The original message will be maintained by passing the
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# original exception.
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exc = raised_exception(six.text_type(exc_info[1]))
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six.reraise(raised_exception, exc, exc_info[2])
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def decorator(function):
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if yields:
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@functools.wraps(function)
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def wrapper(*args, **kwargs):
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try:
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# NOTE(claudiub): We're consuming the function's yield in
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# order to avoid yielding a generator.
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for item in function(*args, **kwargs):
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yield item
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except expected_exceptions as ex:
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_reraise_exception(ex)
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else:
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@functools.wraps(function)
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def wrapper(*args, **kwargs):
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try:
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return function(*args, **kwargs)
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except expected_exceptions as ex:
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_reraise_exception(ex)
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return wrapper
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return decorator
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exception_conversion_map = collections.OrderedDict([
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# NOTE(claudiub): order should be from the most specialized exception type
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# to the most generic exception type.
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# (expected_exception, converted_exception)
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(os_win_exc.NotFound, virt_inspector.InstanceNotFoundException),
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(os_win_exc.OSWinException, virt_inspector.InspectorException),
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])
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# NOTE(claudiub): the purpose of the decorators below is to prevent any
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# os_win exceptions (subclasses of OSWinException) to leak outside of the
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# HyperVInspector.
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class HyperVInspector(virt_inspector.Inspector):
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def __init__(self, conf):
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super(HyperVInspector, self).__init__(conf)
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self._utils = utilsfactory.get_metricsutils()
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self._host_max_cpu_clock = self._compute_host_max_cpu_clock()
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def _compute_host_max_cpu_clock(self):
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hostutils = utilsfactory.get_hostutils()
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# host's number of CPUs and CPU clock speed will not change.
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cpu_info = hostutils.get_cpus_info()
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host_cpu_count = len(cpu_info)
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host_cpu_clock = cpu_info[0]['MaxClockSpeed']
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return float(host_cpu_clock * host_cpu_count)
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@convert_exceptions(exception_conversion_map, yields=False)
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def inspect_instance(self, instance, duration):
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instance_name = util.instance_name(instance)
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(cpu_clock_used,
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cpu_count, uptime) = self._utils.get_cpu_metrics(instance_name)
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cpu_percent_used = cpu_clock_used / self._host_max_cpu_clock
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# Nanoseconds
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cpu_time = (int(uptime * cpu_percent_used) * units.k)
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memory_usage = self._utils.get_memory_metrics(instance_name)
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return virt_inspector.InstanceStats(
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cpu_number=cpu_count,
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cpu_time=cpu_time,
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memory_usage=memory_usage)
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@convert_exceptions(exception_conversion_map)
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def inspect_vnics(self, instance, duration):
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instance_name = util.instance_name(instance)
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for vnic_metrics in self._utils.get_vnic_metrics(instance_name):
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yield virt_inspector.InterfaceStats(
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name=vnic_metrics["element_name"],
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mac=vnic_metrics["address"],
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fref=None,
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parameters=None,
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rx_bytes=vnic_metrics['rx_mb'] * units.Mi,
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rx_packets=0,
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rx_drop=0,
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rx_errors=0,
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tx_bytes=vnic_metrics['tx_mb'] * units.Mi,
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tx_packets=0,
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tx_drop=0,
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tx_errors=0)
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@convert_exceptions(exception_conversion_map)
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def inspect_disks(self, instance, duration):
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instance_name = util.instance_name(instance)
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for disk_metrics in self._utils.get_disk_metrics(instance_name):
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yield virt_inspector.DiskStats(
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device=disk_metrics['instance_id'],
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read_requests=0,
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# Return bytes
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read_bytes=disk_metrics['read_mb'] * units.Mi,
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write_requests=0,
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write_bytes=disk_metrics['write_mb'] * units.Mi,
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errors=0, wr_total_times=0, rd_total_times=0)
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@convert_exceptions(exception_conversion_map)
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def inspect_disk_latency(self, instance, duration):
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instance_name = util.instance_name(instance)
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for disk_metrics in self._utils.get_disk_latency_metrics(
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instance_name):
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yield virt_inspector.DiskLatencyStats(
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device=disk_metrics['instance_id'],
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disk_latency=disk_metrics['disk_latency'] / 1000)
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@convert_exceptions(exception_conversion_map)
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def inspect_disk_iops(self, instance, duration):
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instance_name = util.instance_name(instance)
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for disk_metrics in self._utils.get_disk_iops_count(instance_name):
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yield virt_inspector.DiskIOPSStats(
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device=disk_metrics['instance_id'],
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iops_count=disk_metrics['iops_count'])
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