On May 19, 2016 2:59 PM, "Derek Carr" <dec...@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 <jdeti...@redhat.com> wrote: >> >> >> On Thu, May 19, 2016 at 12:18 PM, Chmouel Boudjnah <chmo...@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 <smil...@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 > >
