124 lines
4.0 KiB
Python
124 lines
4.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import copy
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from heat.common import template_format
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from heat.engine.resources import cloud_watch
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from heat.engine import resource
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from heat.engine import scheduler
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from heat.tests.common import HeatTestCase
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from heat.tests.utils import setup_dummy_db
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from heat.tests.utils import parse_stack
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alarm_template = '''
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{
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"AWSTemplateFormatVersion" : "2010-09-09",
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"Description" : "Alarm Test",
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"Parameters" : {},
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"Resources" : {
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"MEMAlarmHigh": {
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"Type": "AWS::CloudWatch::Alarm",
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"Properties": {
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"AlarmDescription": "Scale-up if MEM > 50% for 1 minute",
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"MetricName": "MemoryUtilization",
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"Namespace": "system/linux",
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"Statistic": "Average",
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"Period": "60",
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"EvaluationPeriods": "1",
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"Threshold": "50",
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"AlarmActions": [],
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"Dimensions": [],
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"ComparisonOperator": "GreaterThanThreshold"
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}
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}
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}
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}
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'''
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class CloudWatchAlarmTest(HeatTestCase):
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def setUp(self):
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super(CloudWatchAlarmTest, self).setUp()
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setup_dummy_db()
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def create_alarm(self, t, stack, resource_name):
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rsrc = cloud_watch.CloudWatchAlarm(resource_name,
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t['Resources'][resource_name],
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stack)
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self.assertEqual(None, rsrc.validate())
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scheduler.TaskRunner(rsrc.create)()
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self.assertEqual((rsrc.CREATE, rsrc.COMPLETE), rsrc.state)
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return rsrc
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def test_mem_alarm_high_update_no_replace(self):
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'''
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Make sure that we can change the update-able properties
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without replacing the Alarm rsrc.
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'''
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t = template_format.parse(alarm_template)
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#short circuit the alarm's references
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properties = t['Resources']['MEMAlarmHigh']['Properties']
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properties['AlarmActions'] = ['a']
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properties['Dimensions'] = [{'a': 'v'}]
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stack = parse_stack(t)
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# the watch rule needs a valid stack_id
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stack.store()
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self.m.ReplayAll()
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rsrc = self.create_alarm(t, stack, 'MEMAlarmHigh')
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snippet = copy.deepcopy(rsrc.parsed_template())
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snippet['Properties']['ComparisonOperator'] = 'LessThanThreshold'
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snippet['Properties']['AlarmDescription'] = 'fruity'
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snippet['Properties']['EvaluationPeriods'] = '2'
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snippet['Properties']['Period'] = '90'
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snippet['Properties']['Statistic'] = 'Maximum'
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snippet['Properties']['Threshold'] = '39'
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self.assertEqual(None, rsrc.update(snippet))
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rsrc.delete()
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self.m.VerifyAll()
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def test_mem_alarm_high_update_replace(self):
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'''
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Make sure that the Alarm resource IS replaced when non-update-able
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properties are changed.
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'''
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t = template_format.parse(alarm_template)
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#short circuit the alarm's references
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properties = t['Resources']['MEMAlarmHigh']['Properties']
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properties['AlarmActions'] = ['a']
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properties['Dimensions'] = [{'a': 'v'}]
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stack = parse_stack(t)
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# the watch rule needs a valid stack_id
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stack.store()
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self.m.ReplayAll()
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rsrc = self.create_alarm(t, stack, 'MEMAlarmHigh')
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snippet = copy.deepcopy(rsrc.parsed_template())
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snippet['Properties']['MetricName'] = 'temp'
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self.assertRaises(resource.UpdateReplace,
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rsrc.update, snippet)
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rsrc.delete()
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self.m.VerifyAll()
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