Stavros' Stuff

Angry rants of programming and other things.

How to easily configure WireGuard

WireGuard is pretty great!

You might have noticed the buzz around WireGuard lately. WireGuard is a very simple VPN that uses state-of-the-art cryptography, and the buzz comes from both the fact that it’s simple and good at what it does, and the fact that it’s so good that it’s going to be included in the Linux kernel by default. Linus Torvalds himself said that he loves it, which took the software world by storm, as we weren’t aware that Linus was capable of love or any emotion other than perkele.

The only problem I’ve found with WireGuard is a lack of documentation, or rather a lack of documentation where you expect it. The quickstart guide, the first thing I look at, mentions a configuration file that it never tells you how to write, and it also assumes you’re more familiar with networking than I am.

Since the initial conditions at the creation of the universe set things up so WireGuard would eventually be underdocumented, I am going against Creation itself and showing you how to easily configure and run it. Let’s

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Kubernetes 101

It's simpler than I thought

A few weeks ago, my task as work was an interesting one: To deploy a Kubernetes cluster and write the associated tooling so that developers can deploy the code in the branches they’re working on to it, so they can test their changes.

Until that point, I’ve been wanting to learn Kubernetes because it sounded interesting (even though the name is rather problematic when you’re Greek), but I never had an opportunity because I don’t have anything that needs to be on a cluster. So, I jumped at the chance, and started reading up on it, but all the materials (including the official tutorial) seemed too verbose and poorly-structured, so I was a bit dejected.

By the way, since you asked, the name is problematic because it's a Greek word, so it's awkward when you're talking to other Greeks about it. If you pronounce it like in English, you sound a bit pretentious, and if you pronounce it like in Greek, people don't understand what you mean, since that's not strictly the name of the software. Greek world problems.

Anyway, after a few days of research, things finally just clicked and I was deploying machines left and right with wild abandon, quickly racking up thousands in AWS bills, like any self-respecting backend developer in 2018. Since my resume now said “Kubernetes expert”, a thought immediately occurred: “Why not take my vast, unending knowledge of this system that I have collected over hours of research and make it more accessible for people?” Since I couldn’t convince myself I shouldn’t write another rambling article, I quickly got to it.

This is

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A short 3D printer primer

Everything you ever wanted to know about buying a 3D printer

Today, it got into my friend Harry’s head that he wants to buy a 3D printer. Normally, I would applaud the decision, so I did. I’ve bought lots of expensive crap I ended up regretting (damn you, quadcopters and photography), but the 3D printer wasn’t one of them. Sure, I don’t use it every day, but it’s amazing to be able to design small things for around the house or parts for hobby projects and seeing them turned into objects in a few minutes.

Since Harry has many questions, as I did when I was his age, I figured I’d answer them all in an article so more people can benefit from them. If you have questions that aren’t covered here, please tweet or toot them to me, and I might add them. Let’s start!

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How to deploy Django on Dokku

It's a dream come true

Ever since I was a wide-eyed little boy, I would look up at the stars and wonder in wonder: “What if I could lease my very own, beefy, dedicated Hetzner server and have an easy way to deploy all my projects onto that?” But lo, my dreams were dashed because Docker wouldn’t be invented for another twenty years, and Hetzner did not accept Mastercard at the time.

Decades later, with Docker finally invented and Hetzner accepting all major credit cards, my dream lay all but forgotten, because Docker could not do zero-downtime deploys natively and I hated it. That was how things remained, until my friend Theodore told me that he tried Dokku and that it worked very well.

I had heard of Dokku (and Fig, Deis, Flynn, Kubernetes, etc etc), but I never paid too much attention, as these PaaSaaSes struck me as too webcale for my simple projects. All I wanted was a way to skip through all the boilerplate configuration of deploying a Django app, and Ansible wasn’t cutting it, as it was still too much plumbing.

Since Theodore tried it and said it was apparently pretty easy to deploy with, though, I figured I’d give it a shot and see. It helped that Dokku was explicitly designed to be light and self-contained, whereas Kubernetes is for much larger deployments, so Dokku fit my use case exactly.

Trying Dokku out

To try Dokku out, I needed a project. Luckily,

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