On May 19, 2016 2:59 PM, "Derek Carr" <decarr redhat com> wrote:
>
> Related: https://github.com/kubernetes/kubernetes/pull/23343
>
> This is the model proposed by CoreOS for supporting cluster-upgrades. Basically, a run-once kubelet is launched by the init system, and pulls down the real kubelet to run as a container, then all other requisite host services are provisioned as a DaemonSet derived set of pods on the node. This does not cover things like kernel updates, but definitely does enable a lot of scenarios for updates of kubelet/openshift-node if we adopted the pattern.
Definitely solves a large chunk of the problem. We still need to worry about host upgrades, data center maintenance, etc.
I'm all for the cluster owning all cluster upgrade related tasks, though.
>
> Thanks,
> Derek
>
>
>
>
>
>
> On Thu, May 19, 2016 at 12:44 PM, Jason DeTiberus <jdetiber redhat com> wrote:
>>
>>
>> On Thu, May 19, 2016 at 12:18 PM, Chmouel Boudjnah <chmouel redhat com> wrote:
>>>
>>> Hello thanks for releasing this blog post, from a first impression
>>> there is a bit of an overlap if you are already cloudforms to do that,
>>> isn't it ?
>>
>>
>> With current implementations, yes. That said, Cloud Forms could eventually switch to using Commissaire for managing clusters of hosts.
>>
>> As commissaire matures, I see great promise for it to handle a lot of the complexity involved in managing complex cluster upgrades (think OpenShift), where even something like applying kernel updates and orchestrating a reboot of hosts requires much more consideration than apply and restart or just performing the operations serially. Long term we need something that can be more integrated with Kubernetes/OpenShift that will allow for making ordering/restarting decisions on things like pod placement, scheduler configuration, and disruption budgets (when they are implemented). Having a centralized place to manage that complexity is much better than having multiple external tools do the same.
>>
>>
>>>
>>>
>>> Chmouel
>>>
>>> On Thu, May 19, 2016 at 3:55 PM, Stephen Milner <smilner redhat com> wrote:
>>> > Hello all,
>>> >
>>> > Have you heard about some kind of cluster host manager project and
>>> > want to learn more? Curious about what this Commissaire thing is that
>>> > has shown up in the Project Atomic GitHub repos?
>>> > The short answer is it is a lightweight REST interface for cluster
>>> > host management. For more information check out the introductory blog
>>> > post ...
>>> >
>>> > http://www.projectatomic.io/blog/2016/05/introducing_commissaire/
>>> >
>>> > ... and stay tuned for more in-depth posts for development and
>>> > operations in the near future!
>>> >
>>> > --
>>> > Thanks,
>>> > Steve Milner
>>> >
>>>
>>
>>
>>
>> --
>> Jason DeTiberus
>
>