83 lines
3.0 KiB
Python
83 lines
3.0 KiB
Python
# 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.
|
|
|
|
import abc
|
|
|
|
import six
|
|
|
|
from nova import objects
|
|
from nova.objects import fields
|
|
|
|
|
|
@six.add_metaclass(abc.ABCMeta)
|
|
class MonitorBase(object):
|
|
"""Base class for all resource monitor plugins."""
|
|
|
|
def __init__(self, compute_manager):
|
|
self.compute_manager = compute_manager
|
|
self.source = None
|
|
|
|
@abc.abstractmethod
|
|
def get_metric(self, name):
|
|
"""Return a (value, timestamp) tuple for the supplied metric name.
|
|
|
|
:param name: The name/key for the metric to grab the value for.
|
|
"""
|
|
raise NotImplementedError('get_metric')
|
|
|
|
@abc.abstractmethod
|
|
def get_metric_names(self):
|
|
"""Get available metric names.
|
|
|
|
Get available metric names, which are represented by a set of keys
|
|
that can be used to check conflicts and duplications
|
|
:returns: set containing one or more values from
|
|
nova.objects.fields.MonitorMetricType.ALL constants
|
|
"""
|
|
raise NotImplementedError('get_metric_names')
|
|
|
|
def add_metrics_to_list(self, metrics_list):
|
|
"""Adds metric objects to a supplied list object.
|
|
|
|
:param metric_list: nova.objects.MonitorMetricList that the monitor
|
|
plugin should append nova.objects.MonitorMetric
|
|
objects to.
|
|
"""
|
|
metric_names = self.get_metric_names()
|
|
metrics = []
|
|
for name in metric_names:
|
|
value, timestamp = self.get_metric(name)
|
|
metric = objects.MonitorMetric(name=name,
|
|
value=value,
|
|
timestamp=timestamp,
|
|
source=self.source)
|
|
metrics.append(metric)
|
|
metrics_list.objects.extend(metrics)
|
|
|
|
|
|
class CPUMonitorBase(MonitorBase):
|
|
"""Base class for all monitors that return CPU-related metrics."""
|
|
|
|
def get_metric_names(self):
|
|
return set([
|
|
fields.MonitorMetricType.CPU_FREQUENCY,
|
|
fields.MonitorMetricType.CPU_USER_TIME,
|
|
fields.MonitorMetricType.CPU_KERNEL_TIME,
|
|
fields.MonitorMetricType.CPU_IDLE_TIME,
|
|
fields.MonitorMetricType.CPU_IOWAIT_TIME,
|
|
fields.MonitorMetricType.CPU_USER_PERCENT,
|
|
fields.MonitorMetricType.CPU_KERNEL_PERCENT,
|
|
fields.MonitorMetricType.CPU_IDLE_PERCENT,
|
|
fields.MonitorMetricType.CPU_IOWAIT_PERCENT,
|
|
fields.MonitorMetricType.CPU_PERCENT,
|
|
])
|