1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
|
# Copyright (c) 2006-2011 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
"""
This module provides an interface to the Elastic Compute Cloud (EC2)
CloudWatch service from AWS.
"""
try:
import simplejson as json
except ImportError:
import json
from boto.connection import AWSQueryConnection
from boto.ec2.cloudwatch.metric import Metric
from boto.ec2.cloudwatch.alarm import MetricAlarm, MetricAlarms, AlarmHistoryItem
from boto.ec2.cloudwatch.datapoint import Datapoint
from boto.regioninfo import RegionInfo
import boto
RegionData = {
'us-east-1' : 'monitoring.us-east-1.amazonaws.com',
'us-west-1' : 'monitoring.us-west-1.amazonaws.com',
'us-west-2' : 'monitoring.us-west-2.amazonaws.com',
'sa-east-1' : 'monitoring.sa-east-1.amazonaws.com',
'eu-west-1' : 'monitoring.eu-west-1.amazonaws.com',
'ap-northeast-1' : 'monitoring.ap-northeast-1.amazonaws.com',
'ap-southeast-1' : 'monitoring.ap-southeast-1.amazonaws.com'}
def regions():
"""
Get all available regions for the CloudWatch service.
:rtype: list
:return: A list of :class:`boto.RegionInfo` instances
"""
regions = []
for region_name in RegionData:
region = RegionInfo(name=region_name,
endpoint=RegionData[region_name],
connection_cls=CloudWatchConnection)
regions.append(region)
return regions
def connect_to_region(region_name, **kw_params):
"""
Given a valid region name, return a
:class:`boto.ec2.cloudwatch.CloudWatchConnection`.
:param str region_name: The name of the region to connect to.
:rtype: :class:`boto.ec2.CloudWatchConnection` or ``None``
:return: A connection to the given region, or None if an invalid region
name is given
"""
for region in regions():
if region.name == region_name:
return region.connect(**kw_params)
return None
class CloudWatchConnection(AWSQueryConnection):
APIVersion = boto.config.get('Boto', 'cloudwatch_version', '2010-08-01')
DefaultRegionName = boto.config.get('Boto', 'cloudwatch_region_name',
'us-east-1')
DefaultRegionEndpoint = boto.config.get('Boto',
'cloudwatch_region_endpoint',
'monitoring.us-east-1.amazonaws.com')
def __init__(self, aws_access_key_id=None, aws_secret_access_key=None,
is_secure=True, port=None, proxy=None, proxy_port=None,
proxy_user=None, proxy_pass=None, debug=0,
https_connection_factory=None, region=None, path='/'):
"""
Init method to create a new connection to EC2 Monitoring Service.
B{Note:} The host argument is overridden by the host specified in the
boto configuration file.
"""
if not region:
region = RegionInfo(self, self.DefaultRegionName,
self.DefaultRegionEndpoint)
self.region = region
AWSQueryConnection.__init__(self, aws_access_key_id,
aws_secret_access_key,
is_secure, port, proxy, proxy_port,
proxy_user, proxy_pass,
self.region.endpoint, debug,
https_connection_factory, path)
def _required_auth_capability(self):
return ['ec2']
def build_dimension_param(self, dimension, params):
prefix = 'Dimensions.member'
for i, dim_name in enumerate(dimension):
dim_value = dimension[dim_name]
if dim_value:
if isinstance(dim_value, basestring):
dim_value = [dim_value]
for j, value in enumerate(dim_value):
params['%s.%d.Name.%d' % (prefix, i+1, j+1)] = dim_name
params['%s.%d.Value.%d' % (prefix, i+1, j+1)] = value
else:
params['%s.%d.Name' % (prefix, i+1)] = dim_name
def build_list_params(self, params, items, label):
if isinstance(items, basestring):
items = [items]
for index, item in enumerate(items):
i = index + 1
if isinstance(item, dict):
for k,v in item.iteritems():
params[label % (i, 'Name')] = k
if v is not None:
params[label % (i, 'Value')] = v
else:
params[label % i] = item
def build_put_params(self, params, name, value=None, timestamp=None,
unit=None, dimensions=None, statistics=None):
args = (name, value, unit, dimensions, statistics)
length = max(map(lambda a: len(a) if isinstance(a, list) else 1, args))
def aslist(a):
if isinstance(a, list):
if len(a) != length:
raise Exception('Must specify equal number of elements; expected %d.' % length)
return a
return [a] * length
for index, (n, v, u, d, s) in enumerate(zip(*map(aslist, args))):
metric_data = {'MetricName': n}
if timestamp:
metric_data['Timestamp'] = timestamp.isoformat()
if unit:
metric_data['Unit'] = u
if dimensions:
self.build_dimension_param(d, metric_data)
if statistics:
metric_data['StatisticValues.Maximum'] = s['maximum']
metric_data['StatisticValues.Minimum'] = s['minimum']
metric_data['StatisticValues.SampleCount'] = s['samplecount']
metric_data['StatisticValues.Sum'] = s['sum']
if value != None:
msg = 'You supplied a value and statistics for a metric.'
msg += 'Posting statistics and not value.'
boto.log.warn(msg)
elif value != None:
metric_data['Value'] = v
else:
raise Exception('Must specify a value or statistics to put.')
for key, value in metric_data.iteritems():
params['MetricData.member.%d.%s' % (index + 1, key)] = value
def get_metric_statistics(self, period, start_time, end_time, metric_name,
namespace, statistics, dimensions=None,
unit=None):
"""
Get time-series data for one or more statistics of a given metric.
:type period: integer
:param period: The granularity, in seconds, of the returned datapoints.
Period must be at least 60 seconds and must be a multiple
of 60. The default value is 60.
:type start_time: datetime
:param start_time: The time stamp to use for determining the first
datapoint to return. The value specified is
inclusive; results include datapoints with the
time stamp specified.
:type end_time: datetime
:param end_time: The time stamp to use for determining the last
datapoint to return. The value specified is
exclusive; results will include datapoints up to
the time stamp specified.
:type metric_name: string
:param metric_name: The metric name.
:type namespace: string
:param namespace: The metric's namespace.
:type statistics: list
:param statistics: A list of statistics names Valid values:
Average | Sum | SampleCount | Maximum | Minimum
:type dimensions: dict
:param dimensions: A dictionary of dimension key/values where
the key is the dimension name and the value
is either a scalar value or an iterator
of values to be associated with that
dimension.
:rtype: list
"""
params = {'Period' : period,
'MetricName' : metric_name,
'Namespace' : namespace,
'StartTime' : start_time.isoformat(),
'EndTime' : end_time.isoformat()}
self.build_list_params(params, statistics, 'Statistics.member.%d')
if dimensions:
self.build_dimension_param(dimensions, params)
return self.get_list('GetMetricStatistics', params,
[('member', Datapoint)])
def list_metrics(self, next_token=None, dimensions=None,
metric_name=None, namespace=None):
"""
Returns a list of the valid metrics for which there is recorded
data available.
:type next_token: str
:param next_token: A maximum of 500 metrics will be returned at one
time. If more results are available, the
ResultSet returned will contain a non-Null
next_token attribute. Passing that token as a
parameter to list_metrics will retrieve the
next page of metrics.
:type dimension: dict
:param dimension_filters: A dictionary containing name/value pairs
that will be used to filter the results.
The key in the dictionary is the name of
a Dimension. The value in the dictionary
is either a scalar value of that Dimension
name that you want to filter on, a list
of values to filter on or None if
you want all metrics with that Dimension name.
:type metric_name: str
:param metric_name: The name of the Metric to filter against. If None,
all Metric names will be returned.
:type namespace: str
:param namespace: A Metric namespace to filter against (e.g. AWS/EC2).
If None, Metrics from all namespaces will be returned.
"""
params = {}
if next_token:
params['NextToken'] = next_token
if dimensions:
self.build_dimension_param(dimensions, params)
if metric_name:
params['MetricName'] = metric_name
if namespace:
params['Namespace'] = namespace
return self.get_list('ListMetrics', params, [('member', Metric)])
def put_metric_data(self, namespace, name, value=None, timestamp=None,
unit=None, dimensions=None, statistics=None):
"""
Publishes metric data points to Amazon CloudWatch. Amazon Cloudwatch
associates the data points with the specified metric. If the specified
metric does not exist, Amazon CloudWatch creates the metric. If a list
is specified for some, but not all, of the arguments, the remaining
arguments are repeated a corresponding number of times.
:type namespace: str
:param namespace: The namespace of the metric.
:type name: str or list
:param name: The name of the metric.
:type value: float or list
:param value: The value for the metric.
:type timestamp: datetime or list
:param timestamp: The time stamp used for the metric. If not specified,
the default value is set to the time the metric data was received.
:type unit: string or list
:param unit: The unit of the metric. Valid Values: Seconds |
Microseconds | Milliseconds | Bytes | Kilobytes |
Megabytes | Gigabytes | Terabytes | Bits | Kilobits |
Megabits | Gigabits | Terabits | Percent | Count |
Bytes/Second | Kilobytes/Second | Megabytes/Second |
Gigabytes/Second | Terabytes/Second | Bits/Second |
Kilobits/Second | Megabits/Second | Gigabits/Second |
Terabits/Second | Count/Second | None
:type dimensions: dict
:param dimensions: Add extra name value pairs to associate
with the metric, i.e.:
{'name1': value1, 'name2': (value2, value3)}
:type statistics: dict or list
:param statistics: Use a statistic set instead of a value, for example::
{'maximum': 30, 'minimum': 1, 'samplecount': 100, 'sum': 10000}
"""
params = {'Namespace': namespace}
self.build_put_params(params, name, value=value, timestamp=timestamp,
unit=unit, dimensions=dimensions, statistics=statistics)
return self.get_status('PutMetricData', params)
def describe_alarms(self, action_prefix=None, alarm_name_prefix=None,
alarm_names=None, max_records=None, state_value=None,
next_token=None):
"""
Retrieves alarms with the specified names. If no name is specified, all
alarms for the user are returned. Alarms can be retrieved by using only
a prefix for the alarm name, the alarm state, or a prefix for any
action.
:type action_prefix: string
:param action_name: The action name prefix.
:type alarm_name_prefix: string
:param alarm_name_prefix: The alarm name prefix. AlarmNames cannot
be specified if this parameter is specified.
:type alarm_names: list
:param alarm_names: A list of alarm names to retrieve information for.
:type max_records: int
:param max_records: The maximum number of alarm descriptions
to retrieve.
:type state_value: string
:param state_value: The state value to be used in matching alarms.
:type next_token: string
:param next_token: The token returned by a previous call to
indicate that there is more data.
:rtype list
"""
params = {}
if action_prefix:
params['ActionPrefix'] = action_prefix
if alarm_name_prefix:
params['AlarmNamePrefix'] = alarm_name_prefix
elif alarm_names:
self.build_list_params(params, alarm_names, 'AlarmNames.member.%s')
if max_records:
params['MaxRecords'] = max_records
if next_token:
params['NextToken'] = next_token
if state_value:
params['StateValue'] = state_value
return self.get_list('DescribeAlarms', params,
[('MetricAlarms', MetricAlarms)])[0]
def describe_alarm_history(self, alarm_name=None,
start_date=None, end_date=None,
max_records=None, history_item_type=None,
next_token=None):
"""
Retrieves history for the specified alarm. Filter alarms by date range
or item type. If an alarm name is not specified, Amazon CloudWatch
returns histories for all of the owner's alarms.
Amazon CloudWatch retains the history of deleted alarms for a period of
six weeks. If an alarm has been deleted, its history can still be
queried.
:type alarm_name: string
:param alarm_name: The name of the alarm.
:type start_date: datetime
:param start_date: The starting date to retrieve alarm history.
:type end_date: datetime
:param end_date: The starting date to retrieve alarm history.
:type history_item_type: string
:param history_item_type: The type of alarm histories to retreive
(ConfigurationUpdate | StateUpdate | Action)
:type max_records: int
:param max_records: The maximum number of alarm descriptions
to retrieve.
:type next_token: string
:param next_token: The token returned by a previous call to indicate
that there is more data.
:rtype list
"""
params = {}
if alarm_name:
params['AlarmName'] = alarm_name
if start_date:
params['StartDate'] = start_date.isoformat()
if end_date:
params['EndDate'] = end_date.isoformat()
if history_item_type:
params['HistoryItemType'] = history_item_type
if max_records:
params['MaxRecords'] = max_records
if next_token:
params['NextToken'] = next_token
return self.get_list('DescribeAlarmHistory', params,
[('member', AlarmHistoryItem)])
def describe_alarms_for_metric(self, metric_name, namespace, period=None,
statistic=None, dimensions=None, unit=None):
"""
Retrieves all alarms for a single metric. Specify a statistic, period,
or unit to filter the set of alarms further.
:type metric_name: string
:param metric_name: The name of the metric
:type namespace: string
:param namespace: The namespace of the metric.
:type period: int
:param period: The period in seconds over which the statistic
is applied.
:type statistic: string
:param statistic: The statistic for the metric.
:param dimension_filters: A dictionary containing name/value pairs
that will be used to filter the results.
The key in the dictionary is the name of
a Dimension. The value in the dictionary
is either a scalar value of that Dimension
name that you want to filter on, a list
of values to filter on or None if
you want all metrics with that Dimension name.
:type unit: string
:rtype list
"""
params = {'MetricName' : metric_name,
'Namespace' : namespace}
if period:
params['Period'] = period
if statistic:
params['Statistic'] = statistic
if dimensions:
self.build_dimension_param(dimensions, params)
if unit:
params['Unit'] = unit
return self.get_list('DescribeAlarmsForMetric', params,
[('member', MetricAlarm)])
def put_metric_alarm(self, alarm):
"""
Creates or updates an alarm and associates it with the specified Amazon
CloudWatch metric. Optionally, this operation can associate one or more
Amazon Simple Notification Service resources with the alarm.
When this operation creates an alarm, the alarm state is immediately
set to INSUFFICIENT_DATA. The alarm is evaluated and its StateValue is
set appropriately. Any actions associated with the StateValue is then
executed.
When updating an existing alarm, its StateValue is left unchanged.
:type alarm: boto.ec2.cloudwatch.alarm.MetricAlarm
:param alarm: MetricAlarm object.
"""
params = {
'AlarmName' : alarm.name,
'MetricName' : alarm.metric,
'Namespace' : alarm.namespace,
'Statistic' : alarm.statistic,
'ComparisonOperator' : alarm.comparison,
'Threshold' : alarm.threshold,
'EvaluationPeriods' : alarm.evaluation_periods,
'Period' : alarm.period,
}
if alarm.actions_enabled is not None:
params['ActionsEnabled'] = alarm.actions_enabled
if alarm.alarm_actions:
self.build_list_params(params, alarm.alarm_actions,
'AlarmActions.member.%s')
if alarm.description:
params['AlarmDescription'] = alarm.description
if alarm.dimensions:
self.build_dimension_param(alarm.dimensions, params)
if alarm.insufficient_data_actions:
self.build_list_params(params, alarm.insufficient_data_actions,
'InsufficientDataActions.member.%s')
if alarm.ok_actions:
self.build_list_params(params, alarm.ok_actions,
'OKActions.member.%s')
if alarm.unit:
params['Unit'] = alarm.unit
alarm.connection = self
return self.get_status('PutMetricAlarm', params)
create_alarm = put_metric_alarm
update_alarm = put_metric_alarm
def delete_alarms(self, alarms):
"""
Deletes all specified alarms. In the event of an error, no
alarms are deleted.
:type alarms: list
:param alarms: List of alarm names.
"""
params = {}
self.build_list_params(params, alarms, 'AlarmNames.member.%s')
return self.get_status('DeleteAlarms', params)
def set_alarm_state(self, alarm_name, state_reason, state_value,
state_reason_data=None):
"""
Temporarily sets the state of an alarm. When the updated StateValue
differs from the previous value, the action configured for the
appropriate state is invoked. This is not a permanent change. The next
periodic alarm check (in about a minute) will set the alarm to its
actual state.
:type alarm_name: string
:param alarm_name: Descriptive name for alarm.
:type state_reason: string
:param state_reason: Human readable reason.
:type state_value: string
:param state_value: OK | ALARM | INSUFFICIENT_DATA
:type state_reason_data: string
:param state_reason_data: Reason string (will be jsonified).
"""
params = {'AlarmName' : alarm_name,
'StateReason' : state_reason,
'StateValue' : state_value}
if state_reason_data:
params['StateReasonData'] = json.dumps(state_reason_data)
return self.get_status('SetAlarmState', params)
def enable_alarm_actions(self, alarm_names):
"""
Enables actions for the specified alarms.
:type alarms: list
:param alarms: List of alarm names.
"""
params = {}
self.build_list_params(params, alarm_names, 'AlarmNames.member.%s')
return self.get_status('EnableAlarmActions', params)
def disable_alarm_actions(self, alarm_names):
"""
Disables actions for the specified alarms.
:type alarms: list
:param alarms: List of alarm names.
"""
params = {}
self.build_list_params(params, alarm_names, 'AlarmNames.member.%s')
return self.get_status('DisableAlarmActions', params)
|
