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Subject: [OASIS Issue Tracker] Commented: (TOSCA-87) Use Case: Specifying additional constraints / preferences when selecting target resources (Nodes) (e.g. prefer a specific Firewall)
[ http://tools.oasis-open.org/issues/browse/TOSCA-87?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33597#action_33597 ]
Aaron Zhang commented on TOSCA-87:
----------------------------------
@Frank: Sounds reasonable, no doubt that Policies in NodeTemplate can be used to resolve this issue.
The question becomes whether we need to define a set of standard Policies, I think.
> Use Case: Specifying additional constraints / preferences when selecting target resources (Nodes) (e.g. prefer a specific Firewall)
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: TOSCA-87
> URL: http://tools.oasis-open.org/issues/browse/TOSCA-87
> Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
> Issue Type: Task
> Components: Interop
> Environment: Use case for development against TOSCA-v1.0-cs01.
> Reporter: Matthew Rutkowski
> Assignee: Aaron Zhang
>
> How does a service template designer provide additional "constraints" to the provider deploying the template in order to convey preference of certain node types (or resources) over another.
> Example:
> A service template declares its need for a Firewall node, but prefers type AAA over type XXX due to reliability.
> Notes:
> Aaron: High Level Suggestion: Extend TOSCA NodeTemplate/NodeType to support specifying additional conditions for target VM resources.
> Options:
> a) Let the deployer specify/recommends the firewall(s) he trusts
> b) Let the deployer specify the firewall(s) he doesn't trust.
> Matt: Perhaps an alternative use case using an artifact type to allow desire for matching to a specific Java runtime (provider, version) over another. Could these be constraints expressed as Reg. Exp. against node or artifact properties?
> Reference:
> https://www.oasis-open.org/apps/org/workgroup/tosca-interop/download.php/48504/New%20Scenarios%20for%20TOSCA%20from%20Huawei.pptx
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