Hostlab Tech

My small tech blog

In my spare time I like to write small tech articles on various topics that interest me and I want to share with the world.

- Author -

SuitDeer

I am a young IT master's student from Germany

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2FA Ubuntu Desktop
2026-02-02

In this small blog post I want to show how to enable 2FA in Ubuntu Desktop.

Ad-hoc file permission change between docker container and host
2026-02-02

In this guide, I want to show how you can modify any docker image so that file permissions of file inside a volume can be modified ad-hoc.

checkmk docker containers as hosts
2026-02-02

In this guide, I will explain how to automatically add docker containers as hosts in checkmk.

Docker bridge network between stacks
2026-02-02

In this guide, I will explain how to connect two containers in different docker-compose.yml Services together that are setup on the same host machine.

filebrowser folders with different ownership
2026-02-02

In this small blog post I want to show how you can manage files inside \ndifferent docker volumes with different file ownerships via the filebrowser container.

Linux automatic updates
2026-02-02

In this post I would like to show how to set up automatic updates on a linux system with a simple bash script:

Mount Longhorn Volume to Host
2026-02-02

In this short article I want to show how to mount a longhorn volume temporally to the host system.

Optimize Kubernetes HA failover time
2026-02-02

In this short article I want to show how you can optimize RKE2 Kubernetes HA failover time. In the default configuration of a RKE2 Kubernetes High Availability Cluster, Workloads are migrating from a failed Node only after 5 minutes. To drop the failover time to 30 seconds we need to edit the following config.yaml file

TrueNAS Backup while preserving file permissions and ownership
2026-02-02

In this small blog post I want to show how you can setup a backup task (Rsync Task) in TrueNAS while preserving the file permissions and ownership on the destination system.

Vaultwarden: Set "vault timeout" policy globally
2026-02-02

In this guide, I want to show you a small bash script that I have written to set the vault timeout setting globally for all your created organizations in Vaultwarden.

Install, update and remove checkmk agent
2026-02-02

Install, update and remove checkmk Agent on Windows or Linux with automated scripts. Furthermore these scripts are adding or removing the client-object in the checkmk-Server (via API calls).

Docker Swarm HA (gluster)
2026-02-02

In this guide I will try to explain how to set up a Docker Swarm system that is completely highly available. In total we need to setup three Ubuntu-Servers.

High Available NFS Server with DRBD
2026-02-02

In this guide, I will try to explain how to set up a High Availability NFS cluster. In total we need to setup two Ubuntu-Servers.