Ghostwriter

Creating a multi-arch K8 cluster - Part 5 - Add a x86-Node

Adding a x86/AMD64 node to the cluster is similar to the steps described in part 2 and part 3 of this guide. This part will add a few details you should pay attention on. At first a bootable installation media with Ubuntu 20.04 LTS for AMD64 is needed.

Helm

(My) public helm charts

While I started my project to setup an own (Home) Kubernetes cluster with a mixed-architecture (AMD64+ARM64), I realized that there are a lot of public helm charts around that do not satisfy my 2 basic needs of: 1. Deploying architecture independent images 2. Fullfil basic security settings (non-root, unprivileged,

Kubernetes

Creating a multi-arch K8 cluster - Part 4 - Setup a load-balancer and NFS

After part 3 of this blog series we have a fully working Kubernetes cluster. Load-BalancerIt has one major drawback: All exposed ports of running pods/services are only reachable under the specific worker node IP address. In a real cluster a load-balancer would handle all incoming traffic and route it

Kubernetes

Kubernetes 1.20 breaking changes

There is a small point in the Release Notes of Kubernetes 1.20 which could break a cluster that using Metallb and/or NFS client provisioner. A feature called selfLink (which is deprecated since 1.16) will finally be removed in 1.21 and needs to be activated manually for

Kubernetes

Creating a multi-arch K8 cluster - Part 3 - Install Docker and Kubernetes

The following steps have to be done on all Raspberry Pi's in the cluster! Prepare Docker installationEnable the linux kernel control groups (cgroups) for Docker and Kubernetes. These cgroups are responsible for isolation and limiting of resources like CPU and memory. Therefor it's necessary to edit the boot firmware file.

Raspberry PI

Creating a multi-arch K8 cluster - Part 2 - Installing the OS

One goal was to use Kubernetes on 64-bit because this architecture is widely supported with a growing number of docker images while arm32v6/v7 is silently dying. Only a 64-bit OS can take full advantage of the 4 GB memory of an Raspberry PI 4. With the hardware that was

Kubernetes

Creating a multi-arch K8 cluster - Part 1 - The hardware setup

Motivation: My initial motivation was to learn more about Kubernetes. When my little home server (a Zotac CI 327) had an outage caused by a SSD failure I started thinking of moving from simple Docker to Kubernetes and building a complete failover and load-balancing cluster. I took this as a

Tools

"Übersicht" Tool for OS X

Today i stumbled over a really nice little desktop widget tool called Übersicht. It’s from the developer Felix Hageloh. Übersicht is like the good old GeekTool and displays information aggregated from system commands or internet services directly onto you desktop background. Thereby Übersicht is much easier to modify,

Docker

How to: Install and remote debug a java application in Docker with IDEA IntelliJ

IDEA IntelliJ has a plugin for docker integration which supports docker container creation, configuration and deployment. This article will guide you how to use the docker integration plugin and remote debug a simple java application running in a docker container. What is used: IDEA IntelliJ 15.0.1, Docker 1.

Debian

Quick - how to: Remote access your docker machine (Debian example)

If you’ve installed docker on a Debian linux machine following the guide on docker.com, you are able to control your containers only if you SSH into this machine or open some kind of tunnel (e.g. Putty) or configure NAT in case of a local vm. Reason:

IntelliJ

Configuring IntelliJ 14.1 (CE) to work with SonarQube 5.1

The official SonarQube plugin for IntelliJ is not maintained since 2014 and doesn’t show SonarQube results in the IntelliJ IDE. I decided to give the SonarQube Community Plugin a chance. It works but there is one tricky dialog during configuration. I will show you how to install and

Restart

After a few month with the Ghost-Blog, i’m back to WordPress and decided to rebuild this site. Unfortunately Ghost didn’t develop as much as i expected last year. The markdown editor was the best feature of it, but otherwise Ghost made only small steps ahead. Welcome