Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
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Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#2@alexellisuk almost all of my interest in Kubernetes is due to your work. Thank you for everything you do!
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#3Everything I know about Kubernetes I learned from a single-node (pseudo)clustered refurbished ThinkPad X201.
It cost me 90€ at an IBM refurbished sell. It is downstairs by the router, and it has been hosting everything for me except my email and my blog (which I want to host but I'm not sure about the reliability of my ISP's service, this morning it went down for 5h12m, without prior notice or anything).
It is amazing how much you learn from doing stuff. I'm currently on my 3rd year of univerity for CS, so I've tried the academia-style learning process, reading books on my own and doing stuff on my own. The latter is the best method by far.
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#4I learned k8s with some NUCs we had laying around at work. Might be easier than Pi, but not as cheap.
Some things I used:
https://metallb.universe.tf/ (LoadBalancer)
https://cilium.io/ (Networking)
https://rook.io/ (Persistent Storage)
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#5Thankfully these days, places like Digital Ocean and Linode have managed K8s where you only pay for the compute nodes, for $5/month each.
So it's fairly cheap and easy to learn on a "real" cluster without having to build one.
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#6A good method for learning how clusters work and playing with them without having to spend a lot of time re-building when you break things is kind (https://kind.sigs.k8s.io/).
Each node is a Docker container, but the version of Kubernetes running inside it is vanilla Kubeadm, so it's quite representative of what "real" clusters would look like.
The great thing about it is you can spin up a cluster in < 2 mins locally to try things out, then it's a single command to delete.
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#7I LOVE Jeff's work and I own his Ansible book. The setup is pretty awesome. FWIW I think you could do this with local VMs a little more easily and provision with Vagrant. Having said that, a cluster of Pis is super fun!
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#8A good method for learning how clusters work and playing with them without having to spend a lot of time re-building when you break things is kind ( https://kind.sigs.k8s.io/ ). Each node is a Docker container, but the version of Kubernetes running inside it is vanilla Kubeadm, so it's quite representative of what "real" clusters would look like. The great thing about it is you can spin up a cluster in < 2 mins local…
How does this compare to k3s? https://rancher.com/docs/k3s/latest/en/
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#9A good method for learning how clusters work and playing with them without having to spend a lot of time re-building when you break things is kind ( https://kind.sigs.k8s.io/ ). Each node is a Docker container, but the version of Kubernetes running inside it is vanilla Kubeadm, so it's quite representative of what "real" clusters would look like. The great thing about it is you can spin up a cluster in < 2 mins local…
How does this compare to k3s? https://rancher.com/docs/k3s/latest/en/
+1 to this. k3s is an extremely lean and simpler k8s. it is a fully certified k8s distro ..with backward compatibility code removed.
perfectly fine running on rpi or production.
Re: Everything I know about Kubernetes I learned from a cluster of Raspberry Pis
#10Wonder if some old netbooks could be used for this purpose. Doubt I am the only one with a small pile of them laying around.