Source code for heat.engine.resources.stack
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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
#
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from heat.common import exception
from heat.engine import stack_resource
from heat.common import template_format
from heat.common import urlfetch
from heat.openstack.common import log as logging
logger = logging.getLogger(__name__)
(PROP_TEMPLATE_URL,
PROP_TIMEOUT_MINS,
PROP_PARAMETERS) = ('TemplateURL', 'TimeoutInMinutes', 'Parameters')
[docs]class NestedStack(stack_resource.StackResource):
'''
A Resource representing a child stack to allow composition of templates.
'''
properties_schema = {PROP_TEMPLATE_URL: {'Type': 'String',
'Required': True},
PROP_TIMEOUT_MINS: {'Type': 'Number'},
PROP_PARAMETERS: {'Type': 'Map'}}
[docs] def handle_create(self):
template_data = urlfetch.get(self.properties[PROP_TEMPLATE_URL])
template = template_format.parse(template_data)
self.create_with_template(template, self.properties[PROP_PARAMETERS])
[docs] def handle_update(self, json_snippet):
return self.UPDATE_REPLACE
[docs] def handle_delete(self):
self.delete_nested()
[docs] def FnGetRefId(self):
return self.nested().identifier().arn()
[docs] def FnGetAtt(self, key):
if not key.startswith('Outputs.'):
raise exception.InvalidTemplateAttribute(
resource=self.physical_resource_name(), key=key)
prefix, dot, op = key.partition('.')
return unicode(self.get_output(op))
[docs]def resource_mapping():
return {
'AWS::CloudFormation::Stack': NestedStack,
}