[jira] [Created] (MESOS-7258) Provide scheduler calls to subscribe to additional roles and unsubscribe from roles.

["Benjamin Mahler (JIRA)" <ji...@apache.org>]

Benjamin Mahler created MESOS-7258:
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             Summary: Provide scheduler calls to subscribe to additional roles and unsubscribe from roles.
                 Key: MESOS-7258
                 URL: https://issues.apache.org/jira/browse/MESOS-7258
             Project: Mesos
          Issue Type: Improvement
          Components: master, scheduler api
            Reporter: Benjamin Mahler


The current support for schedulers to subscribe to additional roles or unsubscribe from some of their roles requires that the scheduler obtain a new subscription with the master which invalidates the event stream.

A more lightweight mechanism would be to provide calls for the scheduler to subscribe to additional roles or unsubscribe from some roles such that the existing event stream remains open and offers to the new roles arrive on the existing event stream. E.g.

SUBSCRIBE_TO_ROLE
UNSUBSCRIBE_FROM_ROLE

One open question pertains to the terminology here, whether we would want to avoid using "subscribe" in this context. An alternative would be:

UPDATE_FRAMEWORK_INFO

Which provides a generic mechanism for a framework to perform framework info updates without obtaining a new event stream.



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