323 lines
12 KiB
Python
323 lines
12 KiB
Python
# Copyright (c) 2010 Reza Lotun http://reza.lotun.name
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish, dis-
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# tribute, sublicense, and/or sell copies of the Software, and to permit
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# persons to whom the Software is furnished to do so, subject to the fol-
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# lowing conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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from datetime import datetime
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from boto.ec2.cloudwatch.listelement import ListElement
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from boto.ec2.cloudwatch.dimension import Dimension
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from boto.compat import json
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from boto.compat import six
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class MetricAlarms(list):
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def __init__(self, connection=None):
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"""
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Parses a list of MetricAlarms.
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"""
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list.__init__(self)
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self.connection = connection
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def startElement(self, name, attrs, connection):
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if name == 'member':
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metric_alarm = MetricAlarm(connection)
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self.append(metric_alarm)
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return metric_alarm
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def endElement(self, name, value, connection):
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pass
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class MetricAlarm(object):
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OK = 'OK'
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ALARM = 'ALARM'
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INSUFFICIENT_DATA = 'INSUFFICIENT_DATA'
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_cmp_map = {
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'>=': 'GreaterThanOrEqualToThreshold',
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'>': 'GreaterThanThreshold',
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'<': 'LessThanThreshold',
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'<=': 'LessThanOrEqualToThreshold',
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}
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_rev_cmp_map = dict((v, k) for (k, v) in six.iteritems(_cmp_map))
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def __init__(self, connection=None, name=None, metric=None,
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namespace=None, statistic=None, comparison=None,
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threshold=None, period=None, evaluation_periods=None,
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unit=None, description='', dimensions=None,
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alarm_actions=None, insufficient_data_actions=None,
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ok_actions=None):
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"""
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Creates a new Alarm.
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:type name: str
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:param name: Name of alarm.
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:type metric: str
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:param metric: Name of alarm's associated metric.
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:type namespace: str
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:param namespace: The namespace for the alarm's metric.
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:type statistic: str
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:param statistic: The statistic to apply to the alarm's associated
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metric.
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Valid values: SampleCount|Average|Sum|Minimum|Maximum
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:type comparison: str
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:param comparison: Comparison used to compare statistic with threshold.
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Valid values: >= | > | < | <=
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:type threshold: float
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:param threshold: The value against which the specified statistic
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is compared.
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:type period: int
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:param period: The period in seconds over which the specified
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statistic is applied.
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:type evaluation_periods: int
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:param evaluation_periods: The number of periods over which data is
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compared to the specified threshold.
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:type unit: str
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:param unit: Allowed Values are:
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Seconds|Microseconds|Milliseconds,
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Bytes|Kilobytes|Megabytes|Gigabytes|Terabytes,
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Bits|Kilobits|Megabits|Gigabits|Terabits,
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Percent|Count|
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Bytes/Second|Kilobytes/Second|Megabytes/Second|
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Gigabytes/Second|Terabytes/Second,
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Bits/Second|Kilobits/Second|Megabits/Second,
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Gigabits/Second|Terabits/Second|Count/Second|None
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:type description: str
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:param description: Description of MetricAlarm
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:type dimensions: dict
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:param dimensions: A dictionary of dimension key/values where
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the key is the dimension name and the value
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is either a scalar value or an iterator
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of values to be associated with that
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dimension.
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Example: {
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'InstanceId': ['i-0123456', 'i-0123457'],
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'LoadBalancerName': 'test-lb'
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}
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:type alarm_actions: list of strs
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:param alarm_actions: A list of the ARNs of the actions to take in
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ALARM state
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:type insufficient_data_actions: list of strs
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:param insufficient_data_actions: A list of the ARNs of the actions to
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take in INSUFFICIENT_DATA state
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:type ok_actions: list of strs
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:param ok_actions: A list of the ARNs of the actions to take in OK state
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"""
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self.name = name
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self.connection = connection
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self.metric = metric
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self.namespace = namespace
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self.statistic = statistic
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if threshold is not None:
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self.threshold = float(threshold)
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else:
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self.threshold = None
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self.comparison = self._cmp_map.get(comparison)
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if period is not None:
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self.period = int(period)
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else:
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self.period = None
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if evaluation_periods is not None:
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self.evaluation_periods = int(evaluation_periods)
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else:
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self.evaluation_periods = None
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self.actions_enabled = None
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self.alarm_arn = None
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self.last_updated = None
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self.description = description
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self.dimensions = dimensions
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self.state_reason = None
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self.state_value = None
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self.unit = unit
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self.alarm_actions = alarm_actions
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self.insufficient_data_actions = insufficient_data_actions
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self.ok_actions = ok_actions
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def __repr__(self):
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return 'MetricAlarm:%s[%s(%s) %s %s]' % (self.name, self.metric,
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self.statistic,
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self.comparison,
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self.threshold)
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def startElement(self, name, attrs, connection):
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if name == 'AlarmActions':
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self.alarm_actions = ListElement()
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return self.alarm_actions
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elif name == 'InsufficientDataActions':
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self.insufficient_data_actions = ListElement()
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return self.insufficient_data_actions
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elif name == 'OKActions':
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self.ok_actions = ListElement()
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return self.ok_actions
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elif name == 'Dimensions':
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self.dimensions = Dimension()
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return self.dimensions
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else:
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pass
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def endElement(self, name, value, connection):
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if name == 'ActionsEnabled':
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self.actions_enabled = value
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elif name == 'AlarmArn':
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self.alarm_arn = value
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elif name == 'AlarmConfigurationUpdatedTimestamp':
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self.last_updated = value
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elif name == 'AlarmDescription':
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self.description = value
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elif name == 'AlarmName':
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self.name = value
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elif name == 'ComparisonOperator':
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setattr(self, 'comparison', self._rev_cmp_map[value])
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elif name == 'EvaluationPeriods':
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self.evaluation_periods = int(value)
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elif name == 'MetricName':
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self.metric = value
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elif name == 'Namespace':
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self.namespace = value
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elif name == 'Period':
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self.period = int(value)
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elif name == 'StateReason':
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self.state_reason = value
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elif name == 'StateValue':
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self.state_value = value
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elif name == 'Statistic':
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self.statistic = value
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elif name == 'Threshold':
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self.threshold = float(value)
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elif name == 'Unit':
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self.unit = value
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else:
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setattr(self, name, value)
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def set_state(self, value, reason, data=None):
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""" Temporarily sets the state of an alarm.
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:type value: str
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:param value: OK | ALARM | INSUFFICIENT_DATA
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:type reason: str
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:param reason: Reason alarm set (human readable).
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:type data: str
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:param data: Reason data (will be jsonified).
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"""
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return self.connection.set_alarm_state(self.name, reason, value, data)
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def update(self):
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return self.connection.update_alarm(self)
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def enable_actions(self):
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return self.connection.enable_alarm_actions([self.name])
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def disable_actions(self):
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return self.connection.disable_alarm_actions([self.name])
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def describe_history(self, start_date=None, end_date=None, max_records=None,
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history_item_type=None, next_token=None):
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return self.connection.describe_alarm_history(self.name, start_date,
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end_date, max_records,
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history_item_type,
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next_token)
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def add_alarm_action(self, action_arn=None):
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"""
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Adds an alarm action, represented as an SNS topic, to this alarm.
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What do do when alarm is triggered.
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:type action_arn: str
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:param action_arn: SNS topics to which notification should be
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sent if the alarm goes to state ALARM.
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"""
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if not action_arn:
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return # Raise exception instead?
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self.actions_enabled = 'true'
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self.alarm_actions.append(action_arn)
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def add_insufficient_data_action(self, action_arn=None):
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"""
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Adds an insufficient_data action, represented as an SNS topic, to
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this alarm. What to do when the insufficient_data state is reached.
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:type action_arn: str
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:param action_arn: SNS topics to which notification should be
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sent if the alarm goes to state INSUFFICIENT_DATA.
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"""
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if not action_arn:
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return
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self.actions_enabled = 'true'
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self.insufficient_data_actions.append(action_arn)
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def add_ok_action(self, action_arn=None):
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"""
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Adds an ok action, represented as an SNS topic, to this alarm. What
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to do when the ok state is reached.
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:type action_arn: str
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:param action_arn: SNS topics to which notification should be
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sent if the alarm goes to state INSUFFICIENT_DATA.
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"""
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if not action_arn:
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return
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self.actions_enabled = 'true'
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self.ok_actions.append(action_arn)
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def delete(self):
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self.connection.delete_alarms([self.name])
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class AlarmHistoryItem(object):
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def __init__(self, connection=None):
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self.connection = connection
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def __repr__(self):
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return 'AlarmHistory:%s[%s at %s]' % (self.name, self.summary, self.timestamp)
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def startElement(self, name, attrs, connection):
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pass
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def endElement(self, name, value, connection):
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if name == 'AlarmName':
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self.name = value
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elif name == 'HistoryData':
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self.data = json.loads(value)
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elif name == 'HistoryItemType':
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self.tem_type = value
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elif name == 'HistorySummary':
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self.summary = value
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elif name == 'Timestamp':
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try:
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self.timestamp = datetime.strptime(value,
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'%Y-%m-%dT%H:%M:%S.%fZ')
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except ValueError:
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self.timestamp = datetime.strptime(value, '%Y-%m-%dT%H:%M:%SZ')
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