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#
# 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 copy
from heat.common import template_format
from heat.engine import resource
from heat.engine.resources.openstack.heat import cloud_watch
from heat.engine import rsrc_defn
from heat.engine import scheduler
from heat.engine import watchrule
from heat.tests import common
from heat.tests import utils
alarm_template = '''
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Description" : "Alarm Test",
"Parameters" : {},
"Resources" : {
"MEMAlarmHigh": {
"Type": "AWS::CloudWatch::Alarm",
"Properties": {
"AlarmDescription": "Scale-up if MEM > 50% for 1 minute",
"MetricName": "MemoryUtilization",
"Namespace": "system/linux",
"Statistic": "Average",
"Period": "60",
"EvaluationPeriods": "1",
"Threshold": "50",
"AlarmActions": [],
"Dimensions": [],
"ComparisonOperator": "GreaterThanThreshold"
}
}
}
}
'''
class CloudWatchAlarmTest(common.HeatTestCase):
def setUp(self):
super(CloudWatchAlarmTest, self).setUp()
def create_alarm(self, t, stack, resource_name):
resource_defns = stack.t.resource_definitions(stack)
rsrc = cloud_watch.CloudWatchAlarm(resource_name,
resource_defns[resource_name],
stack)
self.assertIsNone(rsrc.validate())
scheduler.TaskRunner(rsrc.create)()
self.assertEqual((rsrc.CREATE, rsrc.COMPLETE), rsrc.state)
return rsrc
def test_mem_alarm_high_update_no_replace(self):
'''
Make sure that we can change the update-able properties
without replacing the Alarm rsrc.
'''
t = template_format.parse(alarm_template)
# short circuit the alarm's references
properties = t['Resources']['MEMAlarmHigh']['Properties']
properties['AlarmActions'] = ['a']
properties['Dimensions'] = [{'a': 'v'}]
stack = utils.parse_stack(t)
# the watch rule needs a valid stack_id
stack.store()
self.m.ReplayAll()
rsrc = self.create_alarm(t, stack, 'MEMAlarmHigh')
props = copy.copy(rsrc.properties.data)
props.update({
'ComparisonOperator': 'LessThanThreshold',
'AlarmDescription': 'fruity',
'EvaluationPeriods': '2',
'Period': '90',
'Statistic': 'Maximum',
'Threshold': '39',
})
snippet = rsrc_defn.ResourceDefinition(rsrc.name,
rsrc.type(),
props)
scheduler.TaskRunner(rsrc.update, snippet)()
scheduler.TaskRunner(rsrc.delete)()
self.m.VerifyAll()
def test_mem_alarm_high_update_replace(self):
'''
Make sure that the Alarm resource IS replaced when non-update-able
properties are changed.
'''
t = template_format.parse(alarm_template)
# short circuit the alarm's references
properties = t['Resources']['MEMAlarmHigh']['Properties']
properties['AlarmActions'] = ['a']
properties['Dimensions'] = [{'a': 'v'}]
stack = utils.parse_stack(t)
# the watch rule needs a valid stack_id
stack.store()
self.m.ReplayAll()
rsrc = self.create_alarm(t, stack, 'MEMAlarmHigh')
props = copy.copy(rsrc.properties.data)
props['MetricName'] = 'temp'
snippet = rsrc_defn.ResourceDefinition(rsrc.name,
rsrc.type(),
props)
updater = scheduler.TaskRunner(rsrc.update, snippet)
self.assertRaises(resource.UpdateReplace, updater)
scheduler.TaskRunner(rsrc.delete)()
self.m.VerifyAll()
def test_suspend_resume(self):
t = template_format.parse(alarm_template)
stack_name = "test_cw_alarm_sus_res_stack"
stack = utils.parse_stack(t, stack_name=stack_name)
# the watch rule needs a valid stack_id
stack.store()
self.m.ReplayAll()
rsrc = self.create_alarm(t, stack, 'MEMAlarmHigh')
scheduler.TaskRunner(rsrc.suspend)()
self.assertEqual((rsrc.SUSPEND, rsrc.COMPLETE), rsrc.state)
self.ctx = utils.dummy_context()
wr = watchrule.WatchRule.load(
self.ctx, watch_name="%s-MEMAlarmHigh" % stack_name)
self.assertEqual(watchrule.WatchRule.SUSPENDED, wr.state)
scheduler.TaskRunner(rsrc.resume)()
self.assertEqual((rsrc.RESUME, rsrc.COMPLETE), rsrc.state)
wr = watchrule.WatchRule.load(
self.ctx, watch_name="%s-MEMAlarmHigh" % stack_name)
self.assertEqual(watchrule.WatchRule.NODATA, wr.state)
scheduler.TaskRunner(rsrc.delete)()
self.m.VerifyAll()
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