[OASIS Issue Tracker] Commented: (TOSCA-24) Portability API

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    [ http://tools.oasis-open.org/issues/browse/TOSCA-24?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=30695#action_30695 ] 

Frank Leymann  commented on TOSCA-24:
-------------------------------------

Yes, the plans are considered to be the management API for the cloud service itself, while the node type interfaces are the "local" management APIs for the ingredients of the cloud service.  

The issue at hand has nothing to do with standardizing management APIs for cloud services. The issue is that we need access to instance information about the ingredients of such an cloud service.  For example, you need the actual IP address of the DBMS a particular app server is connected to. For this purpose, we need an API that allows you to navigate the "connected_to" relationship template originating from the instance of the AppServer node template to the instance of the DBMS node template.

> Portability API
> ---------------
>
>                 Key: TOSCA-24
>                 URL: http://tools.oasis-open.org/issues/browse/TOSCA-24
>             Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
>          Issue Type: New Feature
>          Components: Spec
>            Reporter: Frank Leymann 
>            Priority: Critical
>
> Node types provide interfaces the operations of which represent its local management behavior. But our goal is to enable management of a service template "globally", i.e. to specify management actions that are composed of operations of the individual node templates (and their instances).  For this purpose an API is need that allows access to the instances of service templates, the instances of node templates and relationship templates as well as access to the service definition. Such a standardized API is need that allows to specify global management behavior in a portable manner.  In the cloud domain, APIs are typically build following the REST architectural style, i.e. this API should be a REST-based API

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