# 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
def convert_exceptions(function, exception_map):
expected_exceptions = tuple(exception_map.keys())
@functools.wraps(function)
def wrapper(*args, **kwargs):
try:
return function(*args, **kwargs)
except expected_exceptions as ex:
# exception might be a subclass of an expected exception.
for expected in expected_exceptions:
if isinstance(ex, 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])
return wrapper
def decorate_all_methods(decorator, *args, **kwargs):
def decorate(cls):
for attr in cls.__dict__:
class_member = getattr(cls, attr)
if callable(class_member):
setattr(cls, attr, decorator(class_member, *args, **kwargs))
return cls
return decorate
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 decorator below is to prevent any
# os_win exceptions (subclasses of OSWinException) to leak outside of the
# HyperVInspector.
@decorate_all_methods(convert_exceptions, exception_conversion_map)
[docs]class HyperVInspector(virt_inspector.Inspector):
def __init__(self):
super(HyperVInspector, self).__init__()
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] def inspect_cpus(self, instance):
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)
return virt_inspector.CPUStats(number=cpu_count, time=cpu_time)
[docs] def inspect_memory_usage(self, instance, duration=None):
instance_name = util.instance_name(instance)
usage = self._utils.get_memory_metrics(instance_name)
return virt_inspector.MemoryUsageStats(usage=usage)
[docs] def inspect_vnics(self, instance):
instance_name = util.instance_name(instance)
for vnic_metrics in self._utils.get_vnic_metrics(instance_name):
interface = virt_inspector.Interface(
name=vnic_metrics["element_name"],
mac=vnic_metrics["address"],
fref=None,
parameters=None)
stats = virt_inspector.InterfaceStats(
rx_bytes=vnic_metrics['rx_mb'] * units.Mi,
rx_packets=0,
tx_bytes=vnic_metrics['tx_mb'] * units.Mi,
tx_packets=0)
yield (interface, stats)
[docs] def inspect_disks(self, instance):
instance_name = util.instance_name(instance)
for disk_metrics in self._utils.get_disk_metrics(instance_name):
disk = virt_inspector.Disk(device=disk_metrics['instance_id'])
stats = virt_inspector.DiskStats(
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)
yield (disk, stats)
[docs] def inspect_disk_latency(self, instance):
instance_name = util.instance_name(instance)
for disk_metrics in self._utils.get_disk_latency_metrics(
instance_name):
disk = virt_inspector.Disk(device=disk_metrics['instance_id'])
stats = virt_inspector.DiskLatencyStats(
disk_latency=disk_metrics['disk_latency'])
yield (disk, stats)
[docs] def inspect_disk_iops(self, instance):
instance_name = util.instance_name(instance)
for disk_metrics in self._utils.get_disk_iops_count(instance_name):
disk = virt_inspector.Disk(device=disk_metrics['instance_id'])
stats = virt_inspector.DiskIOPSStats(
iops_count=disk_metrics['iops_count'])
yield (disk, stats)