Viewing profile — davidopp__

> To be fair, Kubernetes right now only schedules relatively small clusters. This is not really true: https://news.ycombinator.com/item?id=25907312 https://cloud.google.com/blog/pr…

> it throws out all of the interesting parts of Borg This is not true. It throws out the Google-specific parts of Borg (like integration with Google's service discovery, load balan…

> The biggest is going to be utilisation. Combining workloads pools variance, meaning you can safely run at a higher baseline load. Utilization is arguably the biggest benefit (few…

I don't think multi-tenancy has been "retrofitted" onto Kubernetes. Kubernetes was designed with multi-tenancy in mind from the very early releases -- namespaces, authn/authz (init…

A pattern we're seeing a lot of recently is one cluster per "stage" per region, where a "stage" is something like dev/test, canary, and prod. (In some cases only prod is replicated…

The rescheduler in Borg isn't a scheduler -- it just evicts pods, and then they go into the regular scheduler's pending queue and the regular scheduler decides where to schedule th…

> Borg will remain orders of magnitude beyond Kubernetes until Kubernetes is completely rearchitected. It’s not scalability bugs. It’s decisions regarding how the cluster maintains…

> It can only span multiple clouds now because other clouds had to ship Kubernetes. This isn't true. People were running open-source Kubernetes on AWS and Azure before either provi…

You can actually build an Omega vertical / Mesos framework architecture on Kubernetes, as described in this doc[1]. That doc pre-dated CRDs; the way you'd do it today is to build t…

Stubby and Chubby are not related to Borg's scalability. The reason Kubernetes scalability was originally not so great was because it simply wasn't prioritized. We were more concer…

[Disclaimers: I worked on Borg and Omega, and currently work on Kubernetes/GKE. Everything here is my personal opinion.] There's a lot to unpack here, but I'll do my best. I don't …

I don't understand why you say "Having containers with local volumes is counter productive." I would agree it's probably not a good architecture if you're running a huge single-nod…

> I don't want to break your hopes but stateful containers will only ever run on GCE and AWS. Actually Kubernetes is starting to work on support for persistent local volumes; we kn…

Kubernetes supports pluggable schedulers: http://kubernetes.io/docs/admin/multiple-schedulers/ It also supports pluggable "controllers," which manage the lifecycle of containers. (…

Regarding packages, you might be interested in https://github.com/kubernetes/charts Disclosure: I work on the Kubernetes project at Google.

We're working on directly-integrated Spark-on-Kubernetes right now and would love to get input from folks who are interested. The Github issue where we're discussing it is here: ht…