Hi, PWK co-author here. Indeed, Katacoda is a great site to learn technologies. With our playgrounds we're trying to accomplish a different purpose though. Here's a blog post that explains the idea better: https://medium.com/@marcosnils/introducing-pwk-play-with-k8s....

TL;DR: PWK is a platform composed by different components powered by the an open source core (https://github.com/xetorthio/play-with-docker) that allows the following:

* Try new features fast as it’s updated with the latest dev versions. * Setup clusters in no-time and launch replicated services. * Learn through it’s interactive tutorials (http://training.play-with-docker.com). * Allow to run advanced workshops that’d usually require complex setups. * Collaborate with community members to diagnose and detect issues by sharing your session URL.

The idea is to replicate real case deployments where you need to add/remove nodes to experiment with failures and things like that. You can also go through platform upgrades as PWK allows to run different versions of K8s in the same session.

Additionally, we're planning to launch a training site similar to Docker's (http://training.play-with-docker.com/) to enhance the experience soon. It'd be awesome to get the K8s community help with the content as it's very difficult to scale all this content by ourselves as an free project.

If you need help deploying K8s locally or in your own cloud provider, please let us know so we can help. This is still a very young project, but we think that with some help it could really help the community as it did for Docker.

I've tried the katacoda kubeadm tutorial but it didn't work for me

Thanks! :)

Yeah... hahaha. Sorry about that. We didn't expect so much traffic in such a short period of time. We will add more capacity shortly.

Done. Should be working now.

Yeah. Too much traffic in a short period of time. Sorry about that.

It should work if you are on the master node

Take a look at https://www.katacoda.com/courses/kubernetes/ and the official Kubernetes interactive bootcamp that Katacoda also powers at https://kubernetes.io/docs/tutorials/kubernetes-basics/

We'd love to hear your feedback.

We're working on a tutorials site similar to http://training.play-with-docker.com. We'll try to get it up soon.

Now that I was finally able to load the site I must say I'd have liked to have had some basic tutorials to help me get started. It might haven't been in the scope of this site but surely it would have been nice. Also the recaptcha is just a kick in the balls when it starts asking to pick the right squares. I'd have been happy to sign in with G+ just to skip it.

I used to also recommend kubeadm, but then I recognized there is no HA whatsoever (and what's the point of a cluster that dies with the master?)

Issue to track: https://github.com/kubernetes/kubeadm/issues/261 and https://github.com/kubernetes/kubernetes/pull/44793

I used kubeadm to set up a small cluster on Online.net’s cheap dedicated machines. It works quite well.