containers – apt-upgrade.me – Homelab, Linux & DevSecOps

Bare Metal to K3s: A Nextcloud Migration Battle Log

Mon, 21 Sep 2026 21:50:44 +0200

Today I moved a production Nextcloud from a cozy native bare-metal install to a shiny K3s/container stack. On paper: pull a backup, restore it, flip DNS, done. In practice: a series of small landmines, each invisible until you step on it. Here’s the battle log. 🪖

Step 1: shovel the data 🚚

The heavy lifting was an rsync of ~360 GB of user data plus a ~330 MB SQL dump from the backup box into the new node. Because I pre-synced earlier in the day, the final run only shipped the delta — the whole thing came down to a fast incremental copy. Lesson old as time: pre-seed, then the cutover sync is tiny.

WordPress on K3s — A Nerdy, Layered Update Strategy

Tue, 31 Mar 2026 13:26:24 +0200

This article is a direct continuation of the previous guide. If you haven’t read it yet, start here: Initial Setup: WordPress on K3s (Ansible-managed).

This guide describes a clean, deterministic update pipeline for a WordPress stack running on Kubernetes via K3s, orchestrated with Ansible. Think of it as a layered onion of updates — each layer independently maintainable, yet fully composable. It also serves as a personal reference — a kind of living documentation — until these workflows become second nature to me 😉

From Debian to AlmaLinux to K3s: Or How I Accidentally Built a Mini Cloud 🚀

Mon, 30 Mar 2026 20:02:37 +0200

If you’ve stumbled across my previous post

“Operating Community Nextcloud Instances with Ansible, AlmaLinux, SELinux and a Podman-based Collabora Stack”

you already know this started as a totally reasonable idea.(Narrator voice: It was not a totally reasonable idea.)

The Original Plan™: Leave Debian, Embrace SELinux

At some point I thought: “Hey, why not move from Debian to AlmaLinux?”

Main reason? SELinux.

Because nothing says “fun weekend project” like debugging security contexts at 2 AM.

CKAD Reality Check: Yes, You Can (and Should) Use the Kubernetes Docs Like a Weapon

Fri, 20 Mar 2026 11:45:48 +0100

I’m currently considering taking the CKAD (Certified Kubernetes Application Developer) exam from the Linux Foundation.

The main reason is simple: I want to seriously strengthen my Kubernetes skills and move beyond just “I can deploy stuff”

into actually understanding what’s happening under the hood.

Kubernetes is one of those technologies where you can get things running quickly — but truly mastering it requires structure,

repetition, and hands-on practice under time pressure. That’s exactly what the CKAD exam is designed to test.

🔄 Rethinking the Plan (Again)

Thu, 05 Mar 2026 16:29:45 +0100

Well… it happened again 😄

After writing the original plan and thinking about the architecture for a while, I started questioning some of my decisions. That’s the nice thing about a homelab: nothing is set in stone. The whole point is to iterate, learn, and sometimes rebuild everything from scratch.

So yes — the rebuild plan has changed. Again.

It really feels like that classic Monopoly moment — standing in front of the board, landing on “Go back to Start,” grumbling, and realizing you have to rebuild everything from scratch… 😅🎲