102 lines
3.4 KiB
Python
102 lines
3.4 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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from heat.common.i18n import _
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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 import alarm_base
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from heat.engine import support
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class CompositeAlarm(alarm_base.BaseAlarm):
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"""A resource that implements Aodh composite alarm.
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Allows to specify multiple rules when creating a composite alarm,
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and the rules combined with logical operators: and, or.
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"""
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alarm_type = 'composite'
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support_status = support.SupportStatus(version='8.0.0')
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PROPERTIES = (
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COMPOSITE_RULE, COMPOSITE_OPERATOR, RULES,
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) = (
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'composite_rule', 'operator', 'rules',
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)
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composite_rule_schema = {
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COMPOSITE_OPERATOR: properties.Schema(
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properties.Schema.STRING,
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_('The operator indicates how to combine the rules.'),
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required=True,
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update_allowed=True,
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constraints=[
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constraints.AllowedValues(['or', 'and'])
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]
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),
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RULES: properties.Schema(
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properties.Schema.LIST,
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_('Rules list. Basic threshold/gnocchi rules and nested dict '
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'which combine threshold/gnocchi rules by "and" or "or" are '
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'allowed. For example, the form is like: [RULE1, RULE2, '
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'{"and": [RULE3, RULE4]}], the basic threshold/gnocchi '
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'rules must include a "type" field.'),
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required=True,
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update_allowed=True,
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constraints=[
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constraints.Length(min=2)
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]
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),
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}
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properties_schema = {
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COMPOSITE_RULE: properties.Schema(
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properties.Schema.MAP,
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_('Composite threshold rules in JSON format.'),
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required=True,
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update_allowed=True,
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schema=composite_rule_schema
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)
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}
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properties_schema.update(alarm_base.common_properties_schema)
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def parse_composite_rule(self, props):
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composite_rule = props.get(self.COMPOSITE_RULE)
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operator = composite_rule[self.COMPOSITE_OPERATOR]
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rules = composite_rule[self.RULES]
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props[self.COMPOSITE_RULE] = {operator: rules}
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def handle_create(self):
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props = self.actions_to_urls(self.properties)
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self.parse_composite_rule(props)
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props['name'] = self.physical_resource_name()
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props['type'] = self.alarm_type
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alarm = self.client().alarm.create(props)
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self.resource_id_set(alarm['alarm_id'])
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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if prop_diff:
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updated_props = self.actions_to_urls(prop_diff)
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if self.COMPOSITE_RULE in prop_diff:
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self.parse_composite_rule(updated_props)
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self.client().alarm.update(self.resource_id, updated_props)
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def resource_mapping():
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return {
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'OS::Aodh::CompositeAlarm': CompositeAlarm,
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}
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