[jira] [Created] (MESOS-6338) Support --revocable_cpu_low_priority flag for docker containerizer

["Kunal Thakar (JIRA)" <ji...@apache.org>]

Kunal Thakar created MESOS-6338:
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             Summary: Support --revocable_cpu_low_priority flag for docker containerizer
                 Key: MESOS-6338
                 URL: https://issues.apache.org/jira/browse/MESOS-6338
             Project: Mesos
          Issue Type: Improvement
          Components: containerization
            Reporter: Kunal Thakar


The mesos containerizer supports setting lower shares for revocable tasks by passing --revocable_cpu_low_priority to the mesos agent. This flag is only supported for mesos containerizer, but I don't see a reason why the behavior can't be replicated for the docker containerizer. 

On setting the flag, CPU shares assigned to revocable tasks are lower than normal tasks (https://github.com/apache/mesos/blob/master/src/slave/containerizer/mesos/isolators/cgroups/subsystems/cpu.cpp#L83). This does not happen in the docker containerizer (https://github.com/apache/mesos/blob/master/src/slave/containerizer/docker.cpp#L1517), but it can be easily replicated there. 

I can send a patch if this is acceptable.



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