22e96c022a
This introduces a new package for autoscaling code which is intended for use outside of the Heat engine, and moves the resource_templates function into a new module, heat.scaling.template. The function hasn't been changed at all. Change-Id: I78c420e7a188f2d14780a03b3ea220b9a5fbe86c Implements: partial blueprint as-lib
39 lines
1.5 KiB
Python
39 lines
1.5 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 import short_id
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def resource_templates(old_resources, resource_definition,
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num_resources, num_replace):
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"""
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Create the template for the nested stack of existing and new instances
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For rolling update, if launch configuration is different, the
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instance definition should come from the existing instance instead
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of using the new launch configuration.
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"""
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old_resources = old_resources[-num_resources:]
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num_create = num_resources - len(old_resources)
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num_replace -= num_create
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for i in range(num_resources):
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if i < len(old_resources):
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old_name, old_template = old_resources[i]
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if old_template != resource_definition and num_replace > 0:
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num_replace -= 1
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yield old_name, resource_definition
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else:
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yield old_name, old_template
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else:
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yield short_id.generate_id(), resource_definition
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