Source code for ceilometer.compute.virt.hyperv.inspector

# Copyright 2013 Cloudbase Solutions Srl
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#      http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Implementation of Inspector abstraction for Hyper-V"""

import collections
import functools
import sys

from os_win import exceptions as os_win_exc
from os_win import utilsfactory
from oslo_utils import units
import six

from ceilometer.compute.pollsters import util
from ceilometer.compute.virt import inspector as virt_inspector

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