Kubernetes

Getting started with Kubernetes might seem like a daunting task at first, but getting a basic ephemeral cluster up and running with tools like minikube, kind, or k3d is quite straightforward if you follow their documentation.

With the LLM era upon us, I’ve been wanting to play around with some of the open source, self-hosted toys available. I’m using an old workstation as a homelab, which conveniently has an old NVIDIA GPU installed. Seeing as I’m running a Kubernetes cluster I want to expose the GPU to the workloads to utilise the existing infrastructure for easy hosting, scheduling, and deployment of GPU assisted applications.

In the Gateway API SIG’s own words, If you’re familiar with the older Ingress API, you can think of the Gateway API as analogous to a more-expressive next-generation version of that API.

Archived: This is an archived article, see the updated article here. In the Gateway API SIG’s own words,

In this article we’ll explore how to use Traefik in Kubernetes combined with Cert-manager as an ACME (Automatic Certificate Management Environment) client to issue certificates through Let’s Encrypt.

For my homelab I’m running an over-engineered one-node Kubernetes “cluster” using Cilium as the Container Network Interface (CNI). Up until recently I used MetalLB for LoadBalancer IP Address Management (LB-IPAM) and L2 announcements for Address Resolution Protocol (ARP) requests over the local network, but Cilium has now replaced this functionality.

This is going to be a bit of a follow-up on an earlier article on Cloudflare SSH tunneling where we configured SSH-tunneling through Cloudflare’s WARP-client. In this article we’ll configure Cloudflare’s cloudlared-tunnel and a Zero Trust Application to expose a browser rendered terminal to our server.

I use Argo CD to maintain my Homelab as I find it intuitive. The nice GUI also helps me to quickly inspect problems which might occur when I try something fancy. Another widely used alternative is Flux CD which solves the same problem of GitOps-ing your cluster, but I have little experience with it yet.