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https://issues.apache.org/jira/browse/AMBARI-7201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134112#comment-14134112
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vitthal (Suhas) Gogate commented on AMBARI-7201:
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[~mahadev] [~nalex] I believe currently we can not inherit the stack from
other vendor's stack and in a sense this is fundamentally wrong model. So I
would assume Bigtop stack considered as sibling to HDP and PHD stack and then
PHD inheriting from the Bigtop could be a problem. We may have to make some
awkward changes to Ambari inheritance logic, if we want to follow this model
until we migrate to common services model. We may need a separate Jira to make
this work until we have common services model.
[~nalex] lets chat if PHD can (or should) wait for common services model to be
delivered in Ambari or go with cross vendor stack inheritance model. (This
discussion can be carried on to a separate Jira as it may not be relevant
here).
> Common Services
> ---------------
>
> Key: AMBARI-7201
> URL: https://issues.apache.org/jira/browse/AMBARI-7201
> Project: Ambari
> Issue Type: Epic
> Components: stacks
> Affects Versions: 2.0.0
> Reporter: Robert Levas
> Labels: common-services, service, stack
> Fix For: 2.0.0
>
> Attachments: CommonStackServicesTechnicalDocument.pdf
>
> Original Estimate: 504h
> Remaining Estimate: 504h
>
> *Problem*
> The current implementation of the Ambari stack does not allow for a common
> set of services to be defined and reused in vendor-specific stack
> definitions. Therefore in order for the same service to be made available to
> different stacks, it’s definition must be copied or inherited from stack to
> stack.
> *Solution*
> There needs to be a repository of services that exist outside the scope of
> any vendor-specific stack, but are accessible to vendor-specific stacks via
> service inheritance. This set of services should be known as common services
> and are to be maintained by the community to ensure that changes do not break
> vendor-specific services that inherit from them.
> See [^CommonStackServicesTechnicalDocument.pdf] for more information.
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