GPU scheduling

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rgau...@nvidia.com

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Mar 14, 2017, 7:09:44 PM3/14/17
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Hi !

In today's Resource Management work group. we (Nvidia) presented a way for GPU support
in Kubernetes. We were asked by David Oppenheimer to talk about this in a sig-scheduling meeting.


We think that a solution to the GPU support in Kubernetes lies in having a "more evolved scheduler extender"

What is our goal ?
Our goal here is to be able to specify through the configuration file:
  • The number of GPUs (through OIR ?)
  • Specify your requirements (Family, GPU RAM, ...) through affinity/anti-affinity (see attached).

What is the problem ?
The slides quickly explains that we have abstracted away the resource discovery and runtime management
of GPUs from Kubernetes.

We believe that neither NVML (for GPU discovery) nor container runtime configuration belongs in
K8s and should be handled by the host machine.

Therefore the only thing left is the scheduling and resource management of pods requesting a resource that
K8s does not know.

How did we implement this ?
The core idea of our implementation leverages the scheduler extenders to handle resources. This means that one
extender takes care of one kind of resource (GPU, FPGA, ...) and only schedules pods which requires these kinds
of resources.

Future ?
The logical evolution of this for us would be to be able to have predicates specific to a resource and thus an extender.

What do you think of our approach ?
Is it be possible to talk about this in the next meeting (and of course here) ?

Thanks,
-- 
Renaud Gaubert
@RenaudWasTaken on github.com

config.png
Extender.png

Connor Doyle

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Mar 14, 2017, 7:45:58 PM3/14/17
to rgau...@nvidia.com, kubernetes-sig-scheduling
Thanks for presenting today. No specific feedback on the approach
except that it looks very similar to existing workarounds to support
CPU affinity on top of current k8s. There's an open question whether
k8s will have a real first-class feature set to support GPUs (or more
generally "accelerators".) If the answer is "no" or "not now" then I'd
like to propose that we try to merge this stream of discussion with
the previous topics in the WG on extended resource isolation. We could
consider two primary use cases going forward: customizing cpu affinity
policy and this kind of device management/isolation.
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Jeremy Eder

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Mar 15, 2017, 1:50:02 PM3/15/17
to Connor Doyle, rgau...@nvidia.com, kubernetes-sig-scheduling
Missed this (wish these things were recorded).  +1 to what Connor said.

Slide 6 talks about resource discovery -- I think the community (us) must start rallying around a generic solution for hw discovery and not get tied up in specifics for any random widget.

Can someone remind me why movement on node-feature-discovery [1] stalled?  If there were objections about using labels, I'd recommend reading through the new taints&tolerations docs [2]; it's pretty clear that they are intended to be used exactly as we want.  So, NFD could be taught to write taints.

Also watch the GC Next preso here:  https://www.youtube.com/watch?v=Csf-gxjo4hc&feature=youtu.be&t=2700

[1] https://github.com/kubernetes-incubator/node-feature-discovery

[2] https://github.com/davidopp/kubernetes.github.io/blob/6d0d3feda2836b9269916864e8cd2c5d4fe138dd/docs/user-guide/node-selection/index.md#example-use-cases




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David Oppenheimer

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Mar 20, 2017, 12:47:42 AM3/20/17
to rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
You're certainly welcome to talk about this at the next SIG Scheduling meeting, which is Mon 3/27 @ 2 PM PT at https://zoom.us/j/966775765

BTW this is a good opportunity to publicize the Resource Management Working Group which you mentioned. For those who don't know, it meets every Tuesday @ 11 AM PT at https://zoom.us/j/4799874685) and covers topics that intersect node and cluster-level scheduling.

I've Cc'd Ravi Gadde who has been the main developer on scheduler extender, to make sure he can attend the next scheduling SIG meeting if you want to talk about it there.



On Tue, Mar 14, 2017 at 4:09 PM, <rgau...@nvidia.com> wrote:

Klaus Ma

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Mar 20, 2017, 2:15:08 AM3/20/17
to David Oppenheimer, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
how about 3PM? I'd like to join this meeting :).

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Da (Klaus), Ma (马达), PMP® | Software Architect
IBM Platform Development & Support, STG, IBM GCG
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David Oppenheimer

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Mar 20, 2017, 2:18:56 AM3/20/17
to Klaus Ma, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
I'm fine with moving it to 3 PM next Monday if that works for other people. Might not be ideal for people on the US East Coast, but let's see what people tink.


On Sun, Mar 19, 2017 at 11:14 PM, Klaus Ma <klaus1...@gmail.com> wrote:
how about 3PM? I'd like to join this meeting :).

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Ravi Gadde

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Mar 20, 2017, 3:16:59 AM3/20/17
to David Oppenheimer, Klaus Ma, rgau...@nvidia.com, kubernetes-sig-scheduling
I can attend at both times.

Best,
Ravi

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IBM Platform Development & Support, STG, IBM GCG
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cmluciano

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Mar 20, 2017, 12:28:09 PM3/20/17
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I’d be cool with this time as an east-coaster, but next week is Kubecon EU. It looks like it wIll be approximately 10-11pm in Berlin.

David Oppenheimer

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Mar 21, 2017, 2:05:45 AM3/21/17
to cmluciano, kubernetes-sig-scheduling
Yeah, that would be 11 PM in Berlin.

KubeCon doesn't start until Wednesday, but if people will be in Berlin we could just move the meeting one week later...

(Of course people who will be at KubeCon should feel free to discuss this in-person also.)


On Mon, Mar 20, 2017 at 9:28 AM, cmluciano <cmlu...@us.ibm.com> wrote:
I’d be cool with this time as an east-coaster, but next week is Kubecon EU. It looks like it wIll be approximately 10-11pm in Berlin.
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Jeremy Eder

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Mar 21, 2017, 8:55:04 AM3/21/17
to David Oppenheimer, cmluciano, kubernetes-sig-scheduling
So, who will be in Berlin from sig-scheduling/folks interested in this topic?

On Tue, Mar 21, 2017 at 2:05 AM, 'David Oppenheimer' via kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com> wrote:
Yeah, that would be 11 PM in Berlin.

KubeCon doesn't start until Wednesday, but if people will be in Berlin we could just move the meeting one week later...

(Of course people who will be at KubeCon should feel free to discuss this in-person also.)

On Mon, Mar 20, 2017 at 9:28 AM, cmluciano <cmlu...@us.ibm.com> wrote:
I’d be cool with this time as an east-coaster, but next week is Kubecon EU. It looks like it wIll be approximately 10-11pm in Berlin.

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cmluciano

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Mar 21, 2017, 9:59:32 AM3/21/17
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I'm very interested in this topic and will be in Berlin. I would say that I'm interested enough that I probably would join the meeting at 11pm if we wanted to keep that time.


On Tuesday, March 21, 2017 at 8:55:04 AM UTC-4, Jeremy Eder wrote:
So, who will be in Berlin from sig-scheduling/folks interested in this topic?
On Tue, Mar 21, 2017 at 2:05 AM, 'David Oppenheimer' via kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com> wrote:
Yeah, that would be 11 PM in Berlin.

KubeCon doesn't start until Wednesday, but if people will be in Berlin we could just move the meeting one week later...

(Of course people who will be at KubeCon should feel free to discuss this in-person also.)

On Mon, Mar 20, 2017 at 9:28 AM, cmluciano <cmlu...@us.ibm.com> wrote:
I’d be cool with this time as an east-coaster, but next week is Kubecon EU. It looks like it wIll be approximately 10-11pm in Berlin.

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David Oppenheimer

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Mar 22, 2017, 3:49:33 AM3/22/17
to cmluciano, kubernetes-sig-scheduling
We need more opinions. :-)

Options are
1) 3 PM on this coming Monday
2) 2 PM on the following Monday (special meeting day)

(or any other ideas people have)


On Tue, Mar 21, 2017 at 6:59 AM, cmluciano <cmlu...@us.ibm.com> wrote:
I'm very interested in this topic and will be in Berlin. I would say that I'm interested enough that I probably would join the meeting at 11pm if we wanted to keep that time.

On Tuesday, March 21, 2017 at 8:55:04 AM UTC-4, Jeremy Eder wrote:
So, who will be in Berlin from sig-scheduling/folks interested in this topic?
On Tue, Mar 21, 2017 at 2:05 AM, 'David Oppenheimer' via kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com> wrote:
Yeah, that would be 11 PM in Berlin.

KubeCon doesn't start until Wednesday, but if people will be in Berlin we could just move the meeting one week later...

(Of course people who will be at KubeCon should feel free to discuss this in-person also.)

On Mon, Mar 20, 2017 at 9:28 AM, cmluciano <cmlu...@us.ibm.com> wrote:
I’d be cool with this time as an east-coaster, but next week is Kubecon EU. It looks like it wIll be approximately 10-11pm in Berlin.

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Tim St. Clair

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Mar 22, 2017, 9:30:44 AM3/22/17
to David Oppenheimer, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
FWIW lots of folks will likely be traveling to KubeConEU during that time.

Perhaps we could shift the sig meeting by 1 week.

Cheers,
Tim

On Sun, Mar 19, 2017 at 11:47 PM, 'David Oppenheimer' via
kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com>
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Cheers,
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“Do all the good you can. By all the means you can. In all the ways
you can. In all the places you can. At all the times you can. To all
the people you can. As long as ever you can.”

David Oppenheimer

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Mar 22, 2017, 9:07:29 PM3/22/17
to Tim St. Clair, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
SGTM, let's move it to 3 PM the following Monday. I'll update the calendar invitation.


On Wed, Mar 22, 2017 at 6:30 AM, Tim St. Clair <timo...@gmail.com> wrote:
FWIW lots of folks will likely be traveling to KubeConEU during that time.

Perhaps we could shift the sig meeting by 1 week.

Cheers,
Tim

On Sun, Mar 19, 2017 at 11:47 PM, 'David Oppenheimer' via
kubernetes-sig-scheduling <kubernetes-sig-scheduling@googlegroups.com>
wrote:

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Klaus Ma

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Mar 24, 2017, 10:12:23 PM3/24/17
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Great !

BTW, when will we plan projects for next release (1.7)? 


On Thursday, March 23, 2017 at 9:07:29 AM UTC+8, David Oppenheimer wrote:
SGTM, let's move it to 3 PM the following Monday. I'll update the calendar invitation.

On Wed, Mar 22, 2017 at 6:30 AM, Tim St. Clair <timo...@gmail.com> wrote:
FWIW lots of folks will likely be traveling to KubeConEU during that time.

Perhaps we could shift the sig meeting by 1 week.

Cheers,
Tim

On Sun, Mar 19, 2017 at 11:47 PM, 'David Oppenheimer' via
kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com>
wrote:

>> To view this discussion on the web visit
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David Oppenheimer

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Mar 27, 2017, 4:06:09 AM3/27/17
to Tim St. Clair, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
On Wed, Mar 22, 2017 at 6:07 PM, David Oppenheimer <davi...@google.com> wrote:
SGTM, let's move it to 3 PM the following Monday. I'll update the calendar invitation.

Actually next week is Kubernetes "no meeting week."  Pretty much all of the SIGs are canceling their meetings both this week (due to KubeCon) and next week (due to no meeting week).

I'd propose we cancel the 3 PM (Pacific Time) April 3 meeting, and instead meet at 3 PM (Pacific Time) on April 10. (The March 27 meeting is already canceled.)

What do people think?



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Tim St. Clair

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Mar 30, 2017, 9:29:50 AM3/30/17
to David Oppenheimer, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
Works for me.

On Mon, Mar 27, 2017 at 3:06 AM, 'David Oppenheimer' via
kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com>
wrote:
>
>
> On Wed, Mar 22, 2017 at 6:07 PM, David Oppenheimer <davi...@google.com>
> wrote:
>>
>> SGTM, let's move it to 3 PM the following Monday. I'll update the calendar
>> invitation.
>
>
> Actually next week is Kubernetes "no meeting week." Pretty much all of the
> SIGs are canceling their meetings both this week (due to KubeCon) and next
> week (due to no meeting week).
>
> I'd propose we cancel the 3 PM (Pacific Time) April 3 meeting, and instead
> meet at 3 PM (Pacific Time) on April 10. (The March 27 meeting is already
> canceled.)
>
> What do people think?
>>
>>
>>
>> On Wed, Mar 22, 2017 at 6:30 AM, Tim St. Clair <timo...@gmail.com>
>> wrote:
>>>
>>> FWIW lots of folks will likely be traveling to KubeConEU during that
>>> time.
>>>
>>> Perhaps we could shift the sig meeting by 1 week.
>>>
>>> Cheers,
>>> Tim
>>>
>>> On Sun, Mar 19, 2017 at 11:47 PM, 'David Oppenheimer' via
>>> kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com>
>>> >> email to kubernetes-sig-sch...@googlegroups.com.
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>>> >>
>>> >> https://groups.google.com/d/msgid/kubernetes-sig-scheduling/5797466a-64b9-46d1-b9e3-e54fefde4bbf%40googlegroups.com.
>>> >> For more options, visit https://groups.google.com/d/optout.
>>> >
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>>>
>>>
>>>
>>> --
>>> Cheers,
>>> Timothy St. Clair
>>>
>>> “Do all the good you can. By all the means you can. In all the ways
>>> you can. In all the places you can. At all the times you can. To all
>>> the people you can. As long as ever you can.”
>>
>>
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David Oppenheimer

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Mar 30, 2017, 3:24:47 PM3/30/17
to Tim St. Clair, rgau...@nvidia.com, kubernetes-sig-scheduling, Ravi Gadde
Actually it seems that most people aren't aware of no-meeting week. I'm fine having the meeting this upcoming Monday. But we should decide ASAP.

I believe the people we need are Ravi, rgaubert,  and Klaus (who said he is particularly interested in this topic). Do the three of you prefer this upcoming Monday (Apr 3 @ 3 PM PT) or the following Monday (Apr 10 @ 3 PM PT) ?

Ravi Gadde

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Mar 30, 2017, 3:34:58 PM3/30/17
to David Oppenheimer, Ravi Gadde, Tim St. Clair, kubernetes-sig-scheduling, rgau...@nvidia.com
Hi David,

Either one works for me.

Best
Ravi

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rgau...@nvidia.com

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Mar 30, 2017, 4:59:20 PM3/30/17
to kubernetes-sig-scheduling
Hi,

On Thursday, March 30, 2017 at 12:24:47 PM UTC-7, David Oppenheimer wrote:
Do the three of you prefer this upcoming Monday (Apr 3 @ 3 PM PT) or the following Monday (Apr 10 @ 3 PM PT) ?

Either one works for me :).

Thanks,
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Renaud Gaubert

Klaus Ma

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Mar 30, 2017, 8:12:32 PM3/30/17
to rgau...@nvidia.com, kubernetes-sig-scheduling
Either one works for me :).
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David Oppenheimer

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Mar 31, 2017, 2:13:18 AM3/31/17
to Klaus Ma, rgau...@nvidia.com, kubernetes-sig-scheduling
OK, let's meet this upcoming Monday (April 3) at 3 PM Pacific Time, as we had been planning.


On Thu, Mar 30, 2017 at 5:12 PM, Klaus Ma <k8...@icloud.com> wrote:
Either one works for me :).
On 31 Mar 2017, at 04:59, rgau...@nvidia.com wrote:

Hi,

On Thursday, March 30, 2017 at 12:24:47 PM UTC-7, David Oppenheimer wrote:
Do the three of you prefer this upcoming Monday (Apr 3 @ 3 PM PT) or the following Monday (Apr 10 @ 3 PM PT) ?

Either one works for me :).

Thanks,
-- 
Renaud Gaubert

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RC

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Apr 3, 2017, 5:28:04 PM4/3/17
to David Oppenheimer, Klaus Ma, rgau...@nvidia.com, kubernetes-sig-scheduling
Hi,
how does one join the meeting? I'd like to participate. Also, if there's time and interest, I'd like to discuss https://github.com/kubernetes/kubernetes/issues/44001

On Fri, Mar 31, 2017 at 2:13 AM, 'David Oppenheimer' via kubernetes-sig-scheduling <kubernetes-s...@googlegroups.com> wrote:
OK, let's meet this upcoming Monday (April 3) at 3 PM Pacific Time, as we had been planning.

On Thu, Mar 30, 2017 at 5:12 PM, Klaus Ma <k8...@icloud.com> wrote:
Either one works for me :).
On 31 Mar 2017, at 04:59, rgau...@nvidia.com wrote:

Hi,

On Thursday, March 30, 2017 at 12:24:47 PM UTC-7, David Oppenheimer wrote:
Do the three of you prefer this upcoming Monday (Apr 3 @ 3 PM PT) or the following Monday (Apr 10 @ 3 PM PT) ?

Either one works for me :).

Thanks,
-- 
Renaud Gaubert

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For more options, visit https://groups.google.com/d/optout.



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Rudi

RC

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Apr 3, 2017, 5:28:51 PM4/3/17
to David Oppenheimer, Klaus Ma, rgau...@nvidia.com, kubernetes-sig-scheduling
Nevermind, my message crossed David's. :-)

On Mon, Apr 3, 2017 at 5:27 PM, RC <nut...@gmail.com> wrote:
Hi,
how does one join the meeting? I'd like to participate. Also, if there's time and interest, I'd like to discuss https://github.com/kubernetes/kubernetes/issues/44001



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