Ubuntu on Thalamus

Set up a Kubernetes cluster with MetalLB

Sat, 29 Apr 2023 00:00:00 +0000

A Kubernetes cluster on your own VMs needs a way to give services an address that other machines can reach. This lab uses kubeadm to build the cluster, Calico for pod networking, and MetalLB for LoadBalancer services.

The setup had three Ubuntu VMs: one control plane node and two workers. These notes keep the 2023 versions, including Kubernetes 1.26.4 and Calico 3.25.1. Some steps were missing from the first version, especially the MetalLB network configuration. I explain those gaps below, but the complete setup still needs a fresh test.

CI/CD for a Java project: manual installation

Sun, 12 Apr 2020 00:00:00 +0000

In this Java CI/CD lab, Jenkins runs the build jobs, Docker builds container images, and Nexus stores them. Nginx gives Jenkins and Nexus their own HTTPS addresses. Before connecting the pipeline, each service needs to work on its own.

I split the original project into two parts: install the components by hand first, then automate the setup with Terraform and Ansible. This page covers the manual installation recorded in 2020. It stops before the Java build job and Kubernetes deployment.

Multi-touch gestures configuration

Fri, 27 Mar 2020 00:00:00 +0000

A swipe can switch workspaces by triggering the same shortcut you would press on the keyboard. This note records two setups from 2020: libinput-gestures for a touchpad, and an older Touchégg configuration for a touchscreen.

The original Ubuntu/Linux Mint release and tool versions were not recorded. The examples below explain the setup, but they still need testing on a specified desktop and release.

Check your desktop’s own gestures first

GNOME documents built-in touchpad and touchscreen gestures. Try the actions you need before adding another gesture service.