On here, you will mostly find articles on running my home lab, in the hopes that others can benefit from my own trials and tribulations.


Let’s start with the traditional Why ln –help? name question. Well, one rather amusing part of my career in tech is: Whenever I have to create a symlink in Linux, the first thing I do is running ln --help. Because for the life of me, I can never remember whether the link name or the link target comes first in the argument order. That’s true even when I created another symlink just minutes ago…...

July 22, 2022 · 2 min · Michael

Configuring an Udoo x86 II Ultra for Netbooting

I’m currently planning to switch my Homelab to a cluster of eight Raspberry Pi CM4 modules with two Turing Pi 2 boards. That means a full switch to the aarch64/ARM processor architecture. But not all software supports aarch64 yet. So I went looking for a small x86 machine which doesn’t cost too much, doesn’t take too much space, and doesn’t consume too much power. What I found was the Udoo x86 II Ultra....

September 29, 2022 · 17 min · Michael

Internet in the German ICE train: WireGuard MTU problem

I’m currently on my way home for a family visit and a weekend with friends. I’m sitting in the first class carriage of an Deutsche Bahn ICE train. Internet is working as expected while surfing. A little bit slow, and I’m getting timeouts from time to time. But it’s workable. The problem started after I enabled my WireGuard VPN to connect to my Homelab. Initially, it works okay, but then everything just stops....

September 29, 2022 · 2 min · Michael

Netboot Raspberry Pi Part VI: Conclusion

Finally, the Netboot Raspberry Pi series concludes with this post. I will be going over both, what figuring out the actual netboot and blogging about it was like. If you’ve followed this series, I’m hoping that you’ve learned a lot more than “just” how to produce an image that can netboot a Raspberry Pi 4. For me, the information on the side, like how the initramfs works in the Linux boot process, was more interesting than then netboot itself....

September 25, 2022 · 4 min · Michael

Netboot Raspberry Pi Part V: Ansible Playbook

This is the fifth part of my Raspberry Pi netboot series. The introduction with an overview and links to previous articles can be found here. In this post, we will go over the Ansible playbook I use to provision my Pis. This playbook’s intention is not to fully provision the Pi for use, e.g. it will not set up Nomad or Ceph. It will only prepare the image to netboot and set up my normal Ansible user for my main provisioning Ansible playbooks, to be executed after first boot....

September 25, 2022 · 15 min · Michael