[jira] [Created] (MESOS-7633) Prevent hierarchical roles from being allocated resources from non-HIERARCHICAL_ROLE agents.

["Michael Park (JIRA)" <ji...@apache.org>]

Michael Park created MESOS-7633:
-----------------------------------

             Summary: Prevent hierarchical roles from being allocated resources from non-HIERARCHICAL_ROLE agents.
                 Key: MESOS-7633
                 URL: https://issues.apache.org/jira/browse/MESOS-7633
             Project: Mesos
          Issue Type: Task
            Reporter: Michael Park


Since non-{{HIERARCHICAL_ROLE}} agents cannot handle volume creation on hierarchical roles.

There are a couple of approaches we could have taken here.
(1) Fine-grained: Offer the resources, and reject requests to create volumes on a hierarchical role.
(2) Coarse-grained: Don't offer the resources, require that the agent be upgraded before used with a {{HIERARCHICAL_ROLE}} framework.

The current plan is to pursue (2). A couple of reasons for this. First is that this is a generic behavior that can be expected for any new capability. For example, a {{MULTI_ROLE}} framework does not get offered resources from a non-{{MULTI_ROLE}} agent.

Another reason is there is no feedback loop for a framework when operations fail currently. I believe that it would be more difficult to debug a situation in which a framework's request is being silently dropped, as opposed to not getting offered resources from the agent to begin with.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)