Attach Shared Volume to new tasks

[Harold Molina-Bulla]

Hi everybody,

We are implementing a Scheduler for Mesos in python, and we need to attach a 
preconfigured shared volume to a new Task. The Shared volume is now offered by 
the agents, we can get all information from the offer, but we do not know how 
to attach this volume to a new created task.

We are trying with the follow code:

  for off_volume in offers_disks :
                    volume = task.resources.add()
                    volume.name = "disk"
                    volume.type = mesos_pb2.Value.SCALAR
                    volume.scalar.value = off_volume.scalar.value
                    volume.disk.persistence.id = off_volume.disk.persistence.id
                    volume.disk.volume.container_path = 
off_volume.disk.volume.container_path
                    volume.disk.volume.mode = off_volume.disk.volume.mode

Where offer_disks are the list of offered shared volumes (as we said 
previously, this volume was created before to try to launch the Tasks, with the 
field “shared” defined); task is the new task created using 
mesos_pb2.TaskInfo().

When  we try to create this new task, the system says:

"Task uses invalid resources: Invalid DiskInfo: Persistent volumes cannot be 
created from unreserved resources."

How can I attach this shared volume to my new Task?

Thanks in advance.

H.

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“En una época de mentira universal, decir la verdad constituye un acto 
revolucionario”
George Orwell (1984)
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Recuerda: PRISM te está vigilando!!! X)
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Harold Molina-Bulla
h.mol...@tsc.uc3m.es
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