Ran Ziv created ARIA-254:
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Summary: Support multiple nodes of a node template at service
creation time
Key: ARIA-254
URL: https://issues.apache.org/jira/browse/ARIA-254
Project: AriaTosca
Issue Type: Story
Reporter: Ran Ziv
Priority: Critical
Currently each node template can only have a single node.
We need to support having multiple nodes of a given node-template at service
creation time. The mechanism for this should take into consideration future
stories which would require allowing scaling the number of nodes of a
node-template up or down.
Note: the term {{default_instances}} appears in several places in the code
([1|https://github.com/apache/incubator-ariatosca/blob/1f3e7ff42fefcd5dc8191e3b0eeac0460db059b0/extensions/aria_extension_tosca/profiles/tosca-simple-1.0/capabilities.yaml#L151]
[2|https://github.com/apache/incubator-ariatosca/blob/fdd57c47acfe63dc25c6f20bcb3785225b3f774d/aria/modeling/service_template.py#L310]
[3|https://github.com/apache/incubator-ariatosca/blob/60ea3ebb21e762d36115db26563a93dd3cb72003/extensions/aria_extension_tosca/simple_v1_0/modeling/__init__.py#L163])
- we could perhaps use this or an extension based on this idea to support this
issue.
One other thing that should be taken into consideration (but perhaps be moved
to a separate JIRA issue) is the implicit declaration of multiple instances via
the capabilities&requirements mechanism in TOSCA - We need to decide if to
support this as well or not, and if we do, how does this play together with the
primary method of declaring multiple nodes (or perhaps would this be the only
method of doing so?)
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