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
# 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())

    def wrapper(*args, **kwargs):
            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]

            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)

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