[jira] [Created] (AMBARI-22815) Change requiredServices in metainfo.xml

["Dmytro Sen (JIRA)" <ji...@apache.org>]

Dmytro Sen created AMBARI-22815:
-----------------------------------

             Summary: Change requiredServices in metainfo.xml
                 Key: AMBARI-22815
                 URL: https://issues.apache.org/jira/browse/AMBARI-22815
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 3.0.0
            Reporter: Dmytro Sen
            Assignee: Dmytro Sen
             Fix For: 3.0.0


Today we define requiredServices as follows

{code}
<requiredServices>
    <service>ZOOKEEPER</service>
</requiredServices>
{code}

In the mpack model we need to categorize the scope of service dependency. We could have an INSTALL time dependency (i.e. we should also install the dependent service) or a RUNTIME dependency (i.e. there should be a running instance of the service in the cluster). 

For example HIVE in EDW mpack, will have an install-time dependency on ZOOKEEPER-CLIENT but a RUNTIME dependency on ZOOKEEPER.

{code}
<requiredServices>
  <service>
      <name>ZOOKEEPER-CLIENT</name>
      <scope>INSTALL</scope>
   </service>
  <service>
      <name>ZOOKEEPER</name>
      <scope>RUNTIME</scope>
   </service>
</requiredServices>
{code}

We should also check how we maintain compatibility with legacy stack definitions.



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