106 lines
3.5 KiB
Python
106 lines
3.5 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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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 urllib2
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import json
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from heat.common import exception
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from heat.engine.resources import Resource
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from heat.db import api as db_api
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from heat.engine import parser
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from heat.openstack.common import log as logging
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logger = logging.getLogger(__file__)
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(PROP_TEMPLATE_URL,
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PROP_TIMEOUT_MINS,
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PROP_PARAMETERS) = ('TemplateURL', 'TimeoutInMinutes', 'Parameters')
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class Stack(Resource):
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properties_schema = {PROP_TEMPLATE_URL: {'Type': 'String',
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'Required': True},
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PROP_TIMEOUT_MINS: {'Type': 'Number'},
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PROP_PARAMETERS: {'Type': 'Map'}}
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def __init__(self, name, json_snippet, stack):
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Resource.__init__(self, name, json_snippet, stack)
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self._nested = None
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def _params(self):
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p = self.stack.resolve_runtime_data(self.properties[PROP_PARAMETERS])
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return p
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def nested(self):
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if self._nested is None and self.instance_id is not None:
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self._nested = parser.Stack.load(self.context,
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self.instance_id)
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if self._nested is None:
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raise exception.NotFound('Nested stack not found in DB')
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return self._nested
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def create_with_template(self, child_template):
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'''
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Handle the creation of the nested stack from a given JSON template.
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'''
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template = parser.Template(child_template)
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params = parser.Parameters(self.name, template, self._params())
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self._nested = parser.Stack(self.context,
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self.name,
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template,
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params)
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nested_id = self._nested.store(self.stack)
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self.instance_id_set(nested_id)
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self._nested.create()
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if self._nested.state != self._nested.CREATE_COMPLETE:
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raise exception.Error(self._nested.state_description)
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def handle_create(self):
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response = urllib2.urlopen(self.properties[PROP_TEMPLATE_URL])
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template = json.load(response)
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self.create_with_template(template)
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def handle_delete(self):
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try:
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stack = self.nested()
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except exception.NotFound:
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logger.info("Stack not found to delete")
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else:
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if stack is not None:
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stack.delete()
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def FnGetAtt(self, key):
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if not key.startswith('Outputs.'):
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raise exception.InvalidTemplateAttribute(resource=self.name,
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key=key)
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prefix, dot, op = key.partition('.')
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stack = self.nested()
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if stack is None:
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# This seems like a hack, to get past validation
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return ''
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if op not in stack.outputs:
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raise exception.InvalidTemplateAttribute(resource=self.name,
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key=key)
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return stack.output(op)
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