114 lines
3.8 KiB
Python
114 lines
3.8 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 six
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from heat.common import exception
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from heat.common.i18n import _
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from heat.engine import attributes
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from heat.engine import constraints
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from heat.engine import properties
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from heat.engine.resources.openstack.heat import scaling_policy as heat_sp
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from heat.scaling import scalingutil as sc_util
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class AWSScalingPolicy(heat_sp.AutoScalingPolicy):
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PROPERTIES = (
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AUTO_SCALING_GROUP_NAME, SCALING_ADJUSTMENT, ADJUSTMENT_TYPE,
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COOLDOWN, MIN_ADJUSTMENT_STEP,
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) = (
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'AutoScalingGroupName', 'ScalingAdjustment', 'AdjustmentType',
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'Cooldown', 'MinAdjustmentStep',
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)
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ATTRIBUTES = (
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ALARM_URL,
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) = (
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'AlarmUrl',
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)
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properties_schema = {
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AUTO_SCALING_GROUP_NAME: properties.Schema(
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properties.Schema.STRING,
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_('AutoScaling group name to apply policy to.'),
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required=True
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),
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SCALING_ADJUSTMENT: properties.Schema(
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properties.Schema.INTEGER,
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_('Size of adjustment.'),
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required=True,
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update_allowed=True
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),
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ADJUSTMENT_TYPE: properties.Schema(
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properties.Schema.STRING,
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_('Type of adjustment (absolute or percentage).'),
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required=True,
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constraints=[
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constraints.AllowedValues(
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[sc_util.CFN_CHANGE_IN_CAPACITY,
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sc_util.CFN_EXACT_CAPACITY,
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sc_util.CFN_PERCENT_CHANGE_IN_CAPACITY]),
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],
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update_allowed=True
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),
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COOLDOWN: properties.Schema(
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properties.Schema.INTEGER,
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_('Cooldown period, in seconds.'),
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update_allowed=True
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),
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MIN_ADJUSTMENT_STEP: properties.Schema(
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properties.Schema.INTEGER,
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_('Minimum number of resources that are added or removed '
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'when the AutoScaling group scales up or down. This can '
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'be used only when specifying PercentChangeInCapacity '
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'for the AdjustmentType property.'),
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constraints=[
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constraints.Range(
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min=0,
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),
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],
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update_allowed=True
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),
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}
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attributes_schema = {
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ALARM_URL: attributes.Schema(
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_("A signed url to handle the alarm. (Heat extension)."),
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type=attributes.Schema.STRING,
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cache_mode=attributes.Schema.CACHE_NONE
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),
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}
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def _validate_min_adjustment_step(self):
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adjustment_type = self.properties.get(self.ADJUSTMENT_TYPE)
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adjustment_step = self.properties.get(self.MIN_ADJUSTMENT_STEP)
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if (adjustment_type != sc_util.CFN_PERCENT_CHANGE_IN_CAPACITY
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and adjustment_step is not None):
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raise exception.ResourcePropertyValueDependency(
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prop1=self.MIN_ADJUSTMENT_STEP,
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prop2=self.ADJUSTMENT_TYPE,
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value=sc_util.CFN_PERCENT_CHANGE_IN_CAPACITY)
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def get_reference_id(self):
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if self.resource_id is not None:
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return six.text_type(self._get_ec2_signed_url(never_expire=True))
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else:
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return six.text_type(self.name)
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def resource_mapping():
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return {
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'AWS::AutoScaling::ScalingPolicy': AWSScalingPolicy,
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}
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