[jira] [Assigned] (MESOS-6633) Introduce Resource.AllocationInfo.

["Jay Guo (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-6633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jay Guo reassigned MESOS-6633:
------------------------------

    Assignee: Jay Guo

> Introduce Resource.AllocationInfo.
> ----------------------------------
>
>                 Key: MESOS-6633
>                 URL: https://issues.apache.org/jira/browse/MESOS-6633
>             Project: Mesos
>          Issue Type: Task
>          Components: framework api
>            Reporter: Benjamin Mahler
>            Assignee: Jay Guo
>
> As part of supporting multi-role frameworks, we can no longer assume that the framework ID maps directly to a role. Even without multi-role framework support, this assumption breaks if we want to allow frameworks to modify their role.
> To determine which role resources are allocated to, we now need to store allocation information within the Resource:
> {code}
> message Resource {
>   ...
>   // The role that this resource is reserved for. If "*", this indicates
>   // that the resource is unreserved. Otherwise, the resource will only
>   // be offered to frameworks that belong to this role.
>   optional string role = 6 [default = "*"];
>   
>   message AllocationInfo {
>     // If set, this resource is allocated to a role. Note that
>     // in the future, this may be unset and the scheduler
>     // may be responsible for allocating to one of its roles.
>     optional string role = 1;
>     // In the future, we may add additional fields here, e.g. priority tier,
>     // type of allocation (quota / fair share).
>   }
>   optional AllocationInfo allocation_info = X;
>   ...
> }
> {code}
> An alternative considered was to augment {{TaskInfo}} or {{ExecutorInfo}} or introduce another layer on top of {{Resource}} called {{Allocation}} which contains {{Resource}}. The first option does not work since some components that need to know about the allocation do not have visibility into the tasks/executors. The second option requires dramatic changes and so is harder to accomplish.



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