[jira] [Created] (AMBARI-7985) Allow for server-side commands

["Robert Levas (JIRA)" <ji...@apache.org>]

Robert Levas created AMBARI-7985:
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             Summary: Allow for server-side commands
                 Key: AMBARI-7985
                 URL: https://issues.apache.org/jira/browse/AMBARI-7985
             Project: Ambari
          Issue Type: New Feature
          Components: ambari-server
    Affects Versions: 2.0.0
            Reporter: Robert Levas
            Assignee: Robert Levas
             Fix For: 2.0.0


Ambari currently handles _client-/agent-side_ commands; however there is no ability to handle _server-side_ commands. Server-side commands should be specified as a task in a stage and managed along with the stage.

*Use Case:*  Generate principals and keytabs on the Ambari server before sending the keytabs to their relevant hosts.

*Implementation:*  To addthe concept of a server-side task:
* update {{org.apache.ambari.server.serveraction.ServerAction}} to be an _abstract class_
** _server-side_ tasks must implement this class 
* reuse existing _host_role_command_ and _execution_command_ data
** _server-side_ tasks are to have a role of {{AMBARI_SERVER_ACTION}}
** _server-side_  execution command data should be encapsulated as JSON and specify the ServerAction implementation class and any needed payload data
* {{org.apache.ambari.server.actionmanager.ActionScheduler}} and {{org.apache.ambari.server.serveraction.ServerActionManagerImpl}} need to be updated to handle the execution of server-side tasks
** each _server-side_ task should be executed in its own thread.





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