FEDIDEVS

Is bluesky down or did my internets fall over?

#kubecon

They have a curling court in the vendor hall!

#kubecon

Any of y'all hiring new grads right now? I have a couple I've been working with who are fantastic and on the job market

#kubecon

The one talk I'm attending today (aside from, you know, my own) is "WASM + KWOK Wizardry: Writing and Testing Scheduler Plugins at Scale" by Dejan Pejchev & Jonathan Giannuzzi, G-Research. Because, uh, SimKube.

However, if you're looking for a talk to go to, I strongly recommend my friend @bizzybits's talk "Bring the Joy Back to Deployments!", in 250 AD!

#kubecon

Today we're going to demystify kube-scheduler and build a plugin!

#kubecon

Currently looking at all the scheduling lifecycle hooks. Enqueue -> Filter -> Score -> Bind (skipping a few steps in there).

#kubecon

Now we are going to talk about how you better control kube-scheduler. Scheduler extenders give you a network webhook to control the scheduler. Imposes higher latency and the extenders can get out of sync with the kube-scheduler caches. You can set extenders at Filter, Preempt, Prioritize, and Bind extension points.

#kubecon

We're writing a scheduler extender demo in Python that does some regex filtering.

#kubecon

Scheduler extenders became the scheduling framework, which is a set of pluggable APIs that are compiled directly into kube-scheduler -- lots more extension points. There are a number of in-tree plugins that you can use, but if you want to write your own you have to recompile kube-scheduler.

#kubecon

Recall that you can make your pods (or whatever) to use a different/custom scheduler by setting a field in the podspec.

#kubecon