dominik.suess.wtf

Weekly Wrap 26/10

Sun, 15 Mar 2026 10:00:00 +0100

As I'm writing this, I've just migrated the final PVC to piraeus. I've tested things with smaller volumes over the past week and have now migrated my forgejo storage volume, which was the last remaining jiva PVC. It took a bit of messing around with the helm chart to get piraeus to a state in which I like it but the end result is pretty convincing. It is light on resources, backup works well and workloads can continue to write to the pvc even if the replica goes down.

Weekly Wrap 26/8

Sun, 01 Mar 2026 10:00:00 +0100

Weather around here has taken a drastic turn and we're up to 14C and sunshine! Other than just enjoying the sun, I tinkered with a LED Matrix display we got for a work event to make it display the album cover and song metadata of whatever I'm currently listening to. I published the entire thing on codeberg for anyone to check it out. It felt great building something specific in scope, not too complicated and with immediate results! While there's still room for improvement, I'm happy enough with it for now and will continue working on other projects.

Weekly Wrap 26/9

Sun, 01 Mar 2026 10:00:00 +0100

One of our main projects for this spring is to build a raised bed planter. We sketched out designs this week and I got to work building a CAD model to get accurate measurements and know exactly how it'll look like in the end.

I'm planning to write a longer post about this, but before that, I need to join the dune3d matrix room to ensure I'm not doing something horribly wrong 😅.

Weekly Wrap 26/7

Sun, 22 Feb 2026 10:00:00 +0100

This week, I finally found the time to try out templ in detail. Turns out: I love it! It solves the problem of passing allong the global context elegantly, has better flow control and allows hooking go functions in a type safe way. IMHO, the main advantage over gomponents which I tried out before is the much nicer flow control and built in reloading.

Thanks to Jacky Li's excelent articels I managed to set up emacs with rassumfrassum + superhtml + templ-ts-mode to get LSP capabilities for both templ and html. I'm currently running a fork of superhtml which disables some checks incompatible with templ. It still shows lots of false positives but I might publish it at some point.

override language id in eglot

Mon, 16 Feb 2026 00:00:00 +0000

To override the LSP language id presented to the consuming language server, use this pattern when configuring the target lsp server:

(add-to-list 'eglot-server-programs '((templ-ts-mode :language-id "html") . ("superhtml" "lsp")))

Weekly Wrap 26/6

Sun, 15 Feb 2026 10:00:00 +0100

We've spent a lot of time at the vet this week but things are looking up! Turns out, he apparently broke his tail ages ago and the reason for his current pain was that he got in a fight with another cat. He's almost back to normal now which is great to see!

Due to the vet-chaos and going to the mountain again yesterday, there' isn't much to write home about this week but I did manage to rip out tailwind once and for all! IMHO things look a bit cleaner now as well :)

Weekly Wrap 26/5

Sun, 08 Feb 2026 10:00:00 +0100

The beginning of the week, we were still out skiing. We managed to do 75km in one day which was pretty exhausting.

On Wednesday I finished up removing tailwind from the details section but found one more place that needs cleanup before I can call the tailwind deprecation a success.

In sadder news, one of our cats broke a part of their tail. The vet said he might recover by himself but we're still not seeing clear signs of improvement. Keeping our hopes up that he'll start lifting it on his own again soon 🥺

Weekly Wrap 26/4

Sun, 01 Feb 2026 10:00:00 +0100

This week I continued with ripping out tailwind and finished up everything except for the details page. During this process, I realized I like some helper classes but can do without most of them.

I also spent some time moving my dad's homepage to statichost.eu and the DNS server to desec.io which removes all dependencies on U.S. companies.

Another fun thing I did was to port the ChipNomad Tracker as a hombrew app for the Nintendo Switch.

OTTL cheat sheet

Mon, 26 Jan 2026 00:00:00 +0000

Upstream function reference

Promoting resource attributes to labels

When sending data to the OTLP endpoints of Loki or Mimir, only specific resource attributes are promoted to labels.

Other attributes are stored in the target_info metric or as structured metadata in the case of loki.

For metrics, it is common to attach resource attributes to data points for direct querying. As an example, the following snippet adds the host.name attribute from the resourcedetection processor to metric data points directly:

Weekly Wrap 26/3

Sun, 25 Jan 2026 10:00:00 +0100

Spoiled by gleam/lustre I took a look at gomponents for sharepa but after investing some time into replacing the existing template/html based approach, writing all HTML in go isn't as fun as it sounds. With gleam, conditionals that return values are built in while gomponens requires a custom If/Iff and Map function. It also doesn't support a way to map with the index which then casued me to abandon the aproach alltogether.

Weekly Wrap 26/2

Sun, 18 Jan 2026 10:00:00 +0100

This week I finished up the book creation logic in sharepa and gathered some thoughts around how we want to structure our garden. We recently relocated some of the trees to have more space and we'll build a raised bed planter from scratch so I started picking out what to grow there.

For our marathon prep, we ran 44km this week and went skiing all day yesterday so I'm writing this pretty much in need of rest. We might check out Metabolica in a museum today but other than that, I'm taking a rest day.

Weekly Wrap 26/1

Sun, 11 Jan 2026 10:00:00 +0100

As mentioned in my December Adventure, I'd like to try writing weekly posts on what I did this week. The reasoning behind this is twofold: I'd like to write more and reflecting on things I did gives me the feeling of progress which I'd otherwise loose. My main inspiration is the worm-blossom log but I don't think I have the time to match it in fidelity or content 😅.

I'm not sure if I'll stick with it or if I'm even set on the type of things to write down here but I guess I'll see as time goes on.

Storygleam

Tue, 23 Dec 2025 10:00:00 +0100

storygleam is a gleam package that allows you to test UI components using storybook without having to write a single line of JavaScript!

It is published to hex.pm and you can try it out today!

During this years December Adventure, I tried out gleam to build a finance tracking app for our parkour community. It was my first time working with gleam and I learned a lot of new things and am very happy to be doing some functional programming again! During this endeavor, the talks from Lambda Days 2025 got uploaded to youtube. One of the talks, Testing functional UIs by Hayleigh Thompson inspired me to explore UI testing further. While it specifically mentions fable, this didn't work for me as I'm not actually using lustre for its client side capabilities (only for straight forward html rendering).

eBPF dereference of modified ctx ptr

Thu, 04 Dec 2025 00:00:00 +0000

During this weeks Hackathon at Grafana Labs, I tried to get delve's eBPF tracing to work using a remote-controlled agent. To do this, I took their trace.bpf.c eBPF function that extracts the passed parameters and returns them to a ringbuffer.

Turns out, just compiling this didn't work. The validator always refused to load the program with the following error:

dereference of modified ctx ptr r0

I found the article Ebpf: Dereference of Modified Ctx Ptr Disallowed which told my why the validator refuses to load the program (arbitrary memory access at offsets from the ctx pointer are not allowed) but doesn't offer any fixes. The most likely cause for these issues is the compiler optimizing the output in a way that no longer passes validation.

December Adventure 2025

Mon, 01 Dec 2025 10:00:00 +0100

The goal of December Adventure is to code a bit every day and write about it. Using this as an opportunity to fill my blog with some content while also holding myself accountable to actually code a bit every day.

This year, I want to build something with gleam! It has been on my radar for a while, and I've decided it's now time to finally commit to writing something useful in it.

Configuring a VPN for a single Pod using Cilium

Tue, 18 Nov 2025 00:00:00 +0100

I'll not go into the details of exactly why you'd want this, but I needed to configure a VPN for one of my homelab containers. While I could spawn a sidecar container in the same network namespace to handle this, it didn't feel like the cleanest solution. It also might cause issues with networking inside of the cluster so I wanted to steer clear of this approach. Doing this on the Networking layer of the cluster should be possible, right?

Devolo Home Control with Home Assistant

Tue, 28 Oct 2025 00:00:00 +0100

Fallen leaves, fallen leaves on the ground. And as the seasons (or what we still have left of them) change, the cold sweeps over Vienna. We recently moved to a new place and as such, had to figure out how to actually get it warm during the cold months. In our previous flat, we had a simple thermostat that told our gas boiler when to turn on and off. Our new place is connected to the remote heating network of Vienna, but not new enough for in-floor heating. This means, heating is controlled on the radiators directly. Usually they are fitted with an analog valve but the previous owner left us their devolo Home-Control based system. Obviously, they reset their system before so I had to set it up again.

Setting up octothorpes in Hugo

Wed, 22 Oct 2025 00:00:00 +0100

I recently gained access to the flagship octothorp.es instance and set up this page to automatically generate relevant links based on the categories on posts.

If you haven't heard of octothorpes before, they're basically a way to create tags across the web. For example, this page is categorized as hugo, octothorpes and web on my blog. Clicking on these links takes you to a listing of all my posts in these categories. But this creates silos and information wants to be free. Now that I've enabled octothorpes, this page is indexed by the OP (octothorpe protocol) server so I can link to the octothorpes versions of these tags (hugo, octothorpes, web) as well. These index pages show you all pages across the network using the same tags - how cool is that!

Keeping services up to date with flux & renovate

Sun, 12 Oct 2025 10:00:00 +0100

I often hear people complain how much work it is to keep a homelab up to date. Once you deploy more than one service, you'll eventually loose sight of versions, updates and changes. I used to think this was just a thing I had to deal with.

Enter Immich. It's a very neat piece of software that allows you to backup & organize pictures. When I first set this up, the APIs weren't super stable and updates to the app sometimes broke the functionality entirely as the server didn't know about the new API endpoints yet. This was very annoying so I invested some time into building a flow that'd allow me to keep track of things to update with ease.

Schema driven Observability with OpenTelemetry Weaver

Wed, 08 Oct 2025 00:00:00 +0000

Automagic Observability with eBPF

Tue, 06 May 2025 00:00:00 +0000

Context aware html/template

Thu, 01 May 2025 10:00:00 +0100

Recently, I started working on sharepa again. While I still love the simplicity and ease of use of htmx, the html/template package of the Go standard library is getting increasingly more frustrating as the templates grow more complex.

The issue I want to address in this blog post is passing down per-request context information like information about the authenticated user to templates. For simple templates, it is usally enough to pass this information to the template alongside your data. But once you introduce nested templates or {{ block }} directives, this quickly becomes a hard to maintain mess of inline variables and scope-wrangling.

Clickable banners in discourse

Wed, 05 Mar 2025 10:00:00 +0100

To give our local parkour community a space to talk and organize, I host a discourse instance with many customizations and automizations to ensure smooth weekly meetings and a good experience for first timers.

Over the past years, I came to dread discourse updates as something always breaks. This time, it was the topic banner.

We make heavy use of topic banners to offer one-click access to the next planned training. Sadly discourse does not allow users to click on banners by default. Previous versions supported a workaround by overriding the banner template. Version 3.4.0 migrates the banner component to a new way of defining components which removes support for overriding templates.

250211

Tue, 11 Feb 2025 00:00:00 +0000

Find processes using inotify

Thu, 30 Jan 2025 00:00:00 +0000

File watcher limits can be annoying and most online resources just tell you to increase the system limits. I'd rather fix the issue at the root and find out which processes are using the inotify api.

Thanks to Pauli Nieminen, in this StackOverflow thread for the following snippet:

ps -p $(find /proc/*/fd/* -type l -lname 'anon_inode:inotify' -print 2> /dev/null | sed -e 's/^\/proc\/\([0-9]*\)\/.*/\1/')

Minolta X-700: A renovation project

Fri, 24 Jan 2025 00:00:00 +0000

https://www.photrio.com/forum/threads/minolta-x-700-a-renovation-project.203947/

Contains a whole lot of pictures and detailed teardown instructions. Page is very slow though

My Minolta X-700 Repair

Fri, 24 Jan 2025 00:00:00 +0000

Here be dragons.

I've dug up an old Minolta X-700 and managed to shoot it. Once. Afterward, the shutter would not trigger and the film advance lever seemed to be broken.

In the process of fixing it, I made things way worse.

As of February 2025, I now own a second working Minolta X-700 which I plan on keeping in the best shape possible. If this camera decides to break, at least I have a spare now 🤷.

City of Last Chances

Wed, 08 Jan 2025 00:00:00 +0000

There has always been a darkness to Ilmar, but never more so than now. The city chafes under the heavy hand of the Palleseen occupation, the choke-hold of its criminal underworld, the boot of its factory owners, the weight of its wretched poor and the burden of its ancient curse. What will be the spark that lights the conflagration? Despite the city's refugees, wanderers, murderers, madmen, fanatics and thieves, the catalyst, as always, will be the Anchorwood – that dark grove of trees, that primeval remnant, that portal, when the moon is full, to strange and distant shores.

Wield the Hammer

Wed, 08 Jan 2025 00:00:00 +0000

The Maric workers' saying translates as 'the most effective way to wield the hammer is to stop using it'

From City of Last Chances.

Using denote in hugo

Thu, 02 Jan 2025 10:00:00 +0100

I recently stumbled upon Josh Beckman's wonderfull website and was very delighted by the way they use their website to share their notes. Combined with me reviving my telescope last week and needing a place to write things down that don't warrant a full blog post, I decided to build something like this as well.

I'm not a good notetaker but would like to become one. When trying out tools for this, I experimented with org-roam, obsidian and denote. Out of these tools, denote is the one I liked the most as it allows me to stay inside emacs, use org-mode to write the notes and is much simpler and faster than org-roam. The challenge then became - how can I get these notes published on my website?

Custom EQ5 Mount

Thu, 02 Jan 2025 00:00:00 +0000

My telecope mount is an upgraded Sky-Watcher EQ5. I got the base mount together with my telescope and replaced the built-in tracking system with a custom solution based on OnStep. I followed Oddvar Naess' post on the OnStep mailing list and ended up with a slightly different setup.

Parts

2x Nema 17 Motors, 1.7A, 1.8deg/step = 200 steps
Gear ratio for RA & Dec = 60t/15t = 4
3D printed motor attachments based on these models. I changed the ports to RJ11 and had to make some small cutouts.

OnStep

Thu, 02 Jan 2025 00:00:00 +0000

OnStep (or OnStep X) is a project for DIY telescope mount controllers.

Project documentation and communication happens on the groups.io page

241229

Sun, 29 Dec 2024 00:00:00 +0000

241204

Wed, 04 Dec 2024 00:00:00 +0000

December Adventure 2024

Sun, 01 Dec 2024 10:00:00 +0100

My overall goal is to get working federation into my pet project sharepa, a library of things for small communities. Ideally, this would prevent people from buying stuff for one-time jobs if they can instead borrow it from someone in their community. It's currently nowhere near finished but I want to build it with federation in mind from the beginning to avoid competing instances and having to manage multiple accounts when part of multiple communities.

241119

Tue, 19 Nov 2024 00:00:00 +0000

Field report: PSI Secure browser works on Fedora 40

Wed, 23 Oct 2024 10:00:00 +0100

If you are searching the web if you can complete your PSI Proctored exam (e.g. CKA) on a Fedora machine, your answer is yes.

Even though the system requirements only allow ubuntu, I completed the exam on a Fedora Workstation 40 machine as I couldn't be bothered to install it. You can also do a test exam beforhand which will use the same software as the live one. Just make sure you run on X11 as wayland screensharing is still not there for PSI.

Simple Firefox themes with dark/light mode support

Wed, 23 Oct 2024 10:00:00 +0100

I like my environments consistently themed. If an application does not support theming, chances are that I'm not going to use it. Recently, I've also been on a journey to have consistent dark/light mode toggling for all my apps. After switching from foot to alacritty (which I put off for a looooong time to avoid dealing with nixGL), Firefox was the last eyesore remaining.

Up until now, I was very happy with color.firefox.com for my theming needs. I've used a custom userChrome.css before but got tired of updates breaking the style. The only downside is the fact that the color addon does not support dark/light mode. What a shame!

License to Observe: Why observability solutions need agents

Sat, 28 Sep 2024 00:00:00 +0000

Enabling Play - Leveling up your DevEx Game

Fri, 14 Jun 2024 00:00:00 +0000

How to use Podman inside of a container

Mon, 10 Jun 2024 00:00:00 +0000

https://www.redhat.com/sysadmin/podman-inside-container

Pass the podman socket to a rootless container

Thu, 01 Feb 2024 00:00:00 +0000

The issue preventing this from just working is caused by selinux.

To disable this, either use the --security-opt label=disable or specify the following in compose files:

 runner:
 image: drone/drone-runner-docker:1
 security_opt:
 - label:disable

Source: Sysadmin: How to use Podman inside of a container

Create a database and user in PostgreSQL

Mon, 29 Jan 2024 00:00:00 +0000

CREATE DATABASE mydb;
CREATE USER myuser WITH ENCRYPTED PASSWORD 'mypass';
GRANT ALL PRIVILEGES ON DATABASE mydb TO myuser
-- pg 15+
\c mydb
GRANT ALL ON SCHEMA public TO myuser;

Running the OpenShift console in plain Kubernetes

Sun, 01 May 2022 10:00:00 +0100

The OpenShift console offers a nice GUI intended for use within OpenShift clusters. It offers a consolidated overview of resources, integrated metrics, alerting and also allows you to update cluster resources from a web browser. As the name implies, the console is developed with OpenShift being the primary usecase. During my dayjob, I've grown to really like the OpenShift console for quick checks and visualization of resources, so I wanted to set it up for myself. The only problem: I run k3s at home due to resource constraints. So I set out on a journey to see if I can get the console running on plain Kubernetes.

nebula - the VPN you never knew you wanted

Tue, 15 Mar 2022 10:00:00 +0100

So you're out looking for a VPN for all your networking needs and somehow stumbled across this page. Well let me present Nebula to you!

Nebula is an overlay network which allows you to join machines into a single virtual network. It is also incredibly simple to set up and understand. The underlying cryptographical protocol is the same as WireGuard (Noise Protocol Framework) with the advantage of being easier to manage.

Operators for Beginners

Fri, 24 Jan 2020 00:00:00 +0000

about

Mon, 01 Jan 0001 00:00:00 +0000

Who am I?

As you have probably gathered my name is Dominik Süß. I live in Vienna together with my wife and our two cats.

I like building things, be it software; physical stuff or communities.

Topics that interest me include:

Cooking
Permacomputing/Degrowth
Sports
Boardgames/TTRPGs

Books I recently enjoyed include:

The Dawn of Everything: A New History of Humanity by David Graeber and David Wengrow
Walkaway by Cory Doctorow

Projects I'd like to work on/work with are:

Cloud Native Days Austria

Mon, 01 Jan 0001 00:00:00 +0000

DevConf.cz

Mon, 01 Jan 0001 00:00:00 +0000

DevFest Hamburg 2025

Mon, 01 Jan 0001 00:00:00 +0000

DevOpsDays Ljubljana

Mon, 01 Jan 0001 00:00:00 +0000

Grafana & Friends #6: OTel me what's in store for Observability

Mon, 01 Jan 0001 00:00:00 +0000

KCD Austria

Mon, 01 Jan 0001 00:00:00 +0000

now

Mon, 01 Jan 0001 00:00:00 +0000

improving this website, turning it less-professional and more personal
building sharepa
reading Blood in the Machine by Brian Merchant
~~trying to move to a bigger appartment~~ moving to our new place!
training for a marathon next April

projects

Mon, 01 Jan 0001 00:00:00 +0000

PromCon EU 2025 - Munich

Mon, 01 Jan 0001 00:00:00 +0000

publications

Mon, 01 Jan 0001 00:00:00 +0000

Things I wrote somewhere else or that don’t fit the blog format.

SREDay London Q3

Mon, 01 Jan 0001 00:00:00 +0000

SREDay Paris Q4

Mon, 01 Jan 0001 00:00:00 +0000

Vienna DevOps and Security Meetup - Spring Edition

Mon, 01 Jan 0001 00:00:00 +0000