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From Joshua Cohen <>
Subject Re: [PROPOSAL] Supporting Mesos Universal Containers
Date Tue, 15 Mar 2016 14:55:42 GMT
I've gone ahead and filed some tickets breaking down the work involved in
this effort. They're all contained within this epic:

I agree that we should assess our plans re: containers as a whole. My
understanding of the current state of the world is as follows:

   1. There are definite benefits to adopting the unified containerizer to
   launch image-based tasks (outlined in the design doc, but I'll reiterate
   here: better interaction w/ Mesos isolators, no need to rely on external
   daemons to coordinate containers, etc.).
   2. There are also considerations to keep in mind, specifically, we now
   rely on Mesos maintaining this image support, which is secondary to its
   primary goals, rather than relying on organizations that are invested in
   the formats. Additionally, we'll have to wait on Mesos to implement new
   features of image formats before they can be adopted by Aurora users.

I don't believe that number 2 above should be a blocker to number 1, but
it's a caveat that we must always keep in mind. I'll point out that the
design doc takes a very cautious approach towards deprecating the current
Docker support. It may be that we maintain both in perpetuity. It's also
possible, and I'm hopeful that this is the case, that the Mesos community
will show responsible custodianship of the unified container support,
allaying the concerns outlined above and allowing us to deprecate the
current native-Docker containerizer support. In either case described here,
I think Aurora users will benefit.

Does anyone think we need a stop-the-world moment to come up with a long
term, holistic plan, or is it reasonable to assess the situation as we go?

On Sun, Mar 13, 2016 at 7:23 AM, Erb, Stephan <>

> As mentioned in IRC, I like the proposal.
> Still, we need a discussion regarding the future of current Docker
> support. Especially since Bill and John have now started improving it. What
> are our plans here? What  are the plans of the Mesos community (i.e.,
> deprecation of the docker containerizer)?
> In addition, the switch implemented for disabling Thermos when running
> Docker kind of reminded me of
> It is probably
> worthwhile to at least assess this as a whole.
> Kind Regards,
> Stephan
> ________________________________________
> From: Joshua Cohen <>
> Sent: Monday, March 7, 2016 20:58
> To:
> Subject: [PROPOSAL] Supporting Mesos Universal Containers
> Hi all,
> I'd like to propose we adopt the Mesos universal container support for
> provisioning tasks from both Docker and AppC images. Please review the doc
> below and let me know what you think.
> Thanks!
> Joshua

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