Hello,
Thank you for developing this awesome module. I am trying it out to see if
i can use it with frameworks which needs data persistence. I wanted to know
whether it works for mesos tasks started as docker container as well. I am
unable to create/attach disk to marathon apps started with docker
containerizer.
On Fri, Nov 20, 2015 at 8:02 PM, Wong, Steven <steven.w...@emc.com> wrote:
> Storage providers fall into two categories, those that explicitly have
> architected API support for pre-emptive mount and those that require custom
> coding and orchestration.
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> I anticipate that OpenStack cinder will be supported for pre-emptive mount.
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> Another consideration: if the scenario is not Mesos agent shutdown or
> crash, but instead a network partitioning event. Wihere the agent cluster
> node continues t run, but is seen as equivalent to a crash by the Mesos
> Master, the OpenStack cinder volume will be abruptly “torn away” from the
> original mounter. Should this occur midstream during a write, there is the
> possibility that it would result in some form of data corruption.
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> I expect that OpenStack cinder pre-emptive mount will be delivered in the
> next major release of the rexray driver along with Amazon EBS pre-emptive
> mounts and others TBD.
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> I will update the issue on github with the list of expected storage
> providers as I get closer to delivery.
>
>
>
> Steve Wong
> Contributor to the Mesos dvdi module project
> Developer Advocate
> EMC{code} - the open source advocacy group within EMC
>
> CODE OPEN, DEPLOY EVERYWHERE
> https://github.com/emccode
> blog.emccode.com
>
> 1.562.417.7048
> steven.w...@emc.com
> @cantbewong
>
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>
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>
> *From:* Marica Antonacci [mailto:marica.antona...@ba.infn.it]
> *Sent:* Friday, November 20, 2015 12:44 AM
> *To:* Wong, Steven
> *Subject:* Re: external storage with dvdi module
>
>
>
> Dear Steven,
>
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> thank you very much for your detailed reply; I think that pre-emptive
> mount capability will be certainly a valuable addition.
>
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> As far as I understand, this feature will depend mainly on the underlying
> storage layer and will work only if a related capability is exposed by the
> storage component itself. For example, concerning Openstack Cinder the
> pre-emptive mount is not currently supported and there is a blueprint
> (approved but not implemented yet) for enabling the multiple attachments of
> a single volume. The roadmap for such addition in cinder is not clear to me
> yet…what will be the behavior of the dvdi module (and the openstack storage
> driver) in the meanwhile?
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>
> …
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>
--
Pradeep Chhetri
In the world of Linux, who needs Windows and Gates...
