Ian Downes created MESOS-922:
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Summary: Containerizer to support launching tasks by TaskInfo
Key: MESOS-922
URL: https://issues.apache.org/jira/browse/MESOS-922
Project: Mesos
Issue Type: Improvement
Components: isolation
Affects Versions: 0.17.0
Reporter: Ian Downes
Currently the slave runs tasks by using an existing executor or by launching a
new executor. When a task's TaskInfo doesn't specify the executor with an
ExecutorInfo (has a CommandInfo instead) the slave will create an ExecutorInfo
specifying the mesos-command executor.
The decision on how to launch a task could instead be delegated to the
containerizer and the TaskInfo would be passed unmodifed. This would have the
following advantages:
1) The containerizer can decide on the executor to run the task, either the
mesos-executor or a specialized executor appropriate for the containerization
implementation. Furthermore, the containerizer can allocate appropriate
additional resources for the executor.
2) The containerizer can see the task's resources and can allocate these when
the executor is launched. This is useful for such containerizer implementations
as KVM where it is harder to dynamically adjust a containerized executor's
resources. This is most applicable when the executor will only run a single
task.
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