203b8e8ecf
This will allow Resources to hold weak references to Stacks (so as to avoid circular references) without causing the Stack object to be prematurely deleted. Change-Id: Ia76da7bc51042fb3598ef2a660d6fbf78137a37b Related-Bug: #1454873
221 lines
9.4 KiB
Python
221 lines
9.4 KiB
Python
#
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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 datetime
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import mock
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from oslo_config import cfg
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from oslo_utils import timeutils
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import six
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from heat.common import exception
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from heat.common import template_format
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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.autoscaling import inline_templates
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from heat.tests import common
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from heat.tests import utils
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as_template = inline_templates.as_template
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as_params = inline_templates.as_params
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class TestAutoScalingPolicy(common.HeatTestCase):
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def setUp(self):
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super(TestAutoScalingPolicy, self).setUp()
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cfg.CONF.set_default('heat_waitcondition_server_url',
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'http://server.test:8000/v1/waitcondition')
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def create_scaling_policy(self, t, stack, resource_name):
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rsrc = stack[resource_name]
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self.assertIsNone(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_validate_scaling_policy_ok(self):
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t = template_format.parse(inline_templates.as_template)
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t['Resources']['WebServerScaleUpPolicy']['Properties'][
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'ScalingAdjustment'] = 33
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t['Resources']['WebServerScaleUpPolicy']['Properties'][
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'AdjustmentType'] = 'PercentChangeInCapacity'
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t['Resources']['WebServerScaleUpPolicy']['Properties'][
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'MinAdjustmentStep'] = 2
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stack = utils.parse_stack(t, params=as_params)
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self.policy = stack['WebServerScaleUpPolicy']
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self.assertIsNone(self.policy.validate())
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def test_validate_scaling_policy_error(self):
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t = template_format.parse(inline_templates.as_template)
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t['Resources']['WebServerScaleUpPolicy']['Properties'][
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'ScalingAdjustment'] = 1
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t['Resources']['WebServerScaleUpPolicy']['Properties'][
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'AdjustmentType'] = 'ChangeInCapacity'
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t['Resources']['WebServerScaleUpPolicy']['Properties'][
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'MinAdjustmentStep'] = 2
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stack = utils.parse_stack(t, params=as_params)
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self.policy = stack['WebServerScaleUpPolicy']
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ex = self.assertRaises(exception.ResourcePropertyValueDependency,
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self.policy.validate)
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self.assertIn('MinAdjustmentStep property should only '
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'be specified for AdjustmentType with '
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'value PercentChangeInCapacity.', six.text_type(ex))
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def test_scaling_policy_bad_group(self):
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t = template_format.parse(inline_templates.as_template_bad_group)
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stack = utils.parse_stack(t, params=as_params)
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up_policy = self.create_scaling_policy(t, stack,
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'WebServerScaleUpPolicy')
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ex = self.assertRaises(exception.ResourceFailure, up_policy.signal)
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self.assertIn('Alarm WebServerScaleUpPolicy could '
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'not find scaling group', six.text_type(ex))
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def test_scaling_policy_not_alarm_state(self):
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"""If the details don't have 'alarm' then don't progress."""
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t = template_format.parse(as_template)
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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test = {'current': 'not_an_alarm'}
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with mock.patch.object(pol, '_cooldown_inprogress',
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side_effect=AssertionError()) as dont_call:
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self.assertRaises(resource.NoActionRequired,
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pol.handle_signal, details=test)
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self.assertEqual([], dont_call.call_args_list)
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def test_scaling_policy_cooldown_toosoon(self):
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"""If _cooldown_inprogress() returns True don't progress."""
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t = template_format.parse(as_template)
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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test = {'current': 'alarm'}
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with mock.patch.object(pol.stack, 'resource_by_refid',
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side_effect=AssertionError) as dont_call:
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with mock.patch.object(pol, '_cooldown_inprogress',
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return_value=True) as mock_cip:
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self.assertRaises(resource.NoActionRequired,
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pol.handle_signal, details=test)
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mock_cip.assert_called_once_with()
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self.assertEqual([], dont_call.call_args_list)
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def test_scaling_policy_cooldown_ok(self):
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t = template_format.parse(as_template)
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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test = {'current': 'alarm'}
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group = self.patchobject(pol.stack, 'resource_by_refid').return_value
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group.name = 'fluffy'
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with mock.patch.object(pol, '_cooldown_inprogress',
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return_value=False) as mock_cip:
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pol.handle_signal(details=test)
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mock_cip.assert_called_once_with()
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group.adjust.assert_called_once_with(1, 'ChangeInCapacity', None)
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class TestCooldownMixin(common.HeatTestCase):
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def setUp(self):
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super(TestCooldownMixin, self).setUp()
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cfg.CONF.set_default('heat_waitcondition_server_url',
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'http://server.test:8000/v1/waitcondition')
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def create_scaling_policy(self, t, stack, resource_name):
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rsrc = stack[resource_name]
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self.assertIsNone(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_is_in_progress(self):
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t = template_format.parse(as_template)
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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now = timeutils.utcnow()
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previous_meta = {timeutils.strtime(now): 'ChangeInCapacity : 1'}
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self.patchobject(pol, 'metadata_get', return_value=previous_meta)
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self.assertTrue(pol._cooldown_inprogress())
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def test_not_in_progress(self):
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t = template_format.parse(as_template)
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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awhile_ago = timeutils.utcnow() - datetime.timedelta(seconds=100)
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previous_meta = {timeutils.strtime(awhile_ago): 'ChangeInCapacity : 1'}
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self.patchobject(pol, 'metadata_get', return_value=previous_meta)
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self.assertFalse(pol._cooldown_inprogress())
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def test_scaling_policy_cooldown_zero(self):
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t = template_format.parse(as_template)
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# Create the scaling policy (with Cooldown=0) and scale up one
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properties = t['Resources']['WebServerScaleUpPolicy']['Properties']
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properties['Cooldown'] = '0'
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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now = timeutils.utcnow()
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previous_meta = {timeutils.strtime(now): 'ChangeInCapacity : 1'}
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self.patchobject(pol, 'metadata_get', return_value=previous_meta)
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self.assertFalse(pol._cooldown_inprogress())
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def test_scaling_policy_cooldown_none(self):
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t = template_format.parse(as_template)
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# Create the scaling policy no Cooldown property, should behave the
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# same as when Cooldown==0
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properties = t['Resources']['WebServerScaleUpPolicy']['Properties']
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del properties['Cooldown']
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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now = timeutils.utcnow()
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previous_meta = {timeutils.strtime(now): 'ChangeInCapacity : 1'}
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self.patchobject(pol, 'metadata_get', return_value=previous_meta)
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self.assertFalse(pol._cooldown_inprogress())
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def test_metadata_is_written(self):
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t = template_format.parse(as_template)
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stack = utils.parse_stack(t, params=as_params)
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pol = self.create_scaling_policy(t, stack, 'WebServerScaleUpPolicy')
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nowish = timeutils.strtime()
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reason = 'cool as'
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meta_set = self.patchobject(pol, 'metadata_set')
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self.patchobject(timeutils, 'strtime', return_value=nowish)
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pol._cooldown_timestamp(reason)
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meta_set.assert_called_once_with({nowish: reason})
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class ScalingPolicyAttrTest(common.HeatTestCase):
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def setUp(self):
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super(ScalingPolicyAttrTest, self).setUp()
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t = template_format.parse(as_template)
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self.stack = utils.parse_stack(t, params=as_params)
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self.policy = self.stack['WebServerScaleUpPolicy']
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self.assertIsNone(self.policy.validate())
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scheduler.TaskRunner(self.policy.create)()
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self.assertEqual((self.policy.CREATE, self.policy.COMPLETE),
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self.policy.state)
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def test_alarm_attribute(self):
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self.assertIn("WebServerScaleUpPolicy",
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self.policy.FnGetAtt('AlarmUrl'))
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