Tag Archives: network

Adding multi-gigabit support to an HP EliteDesk G2 Mini

I use a stack of HP EliteDesk G2 Minis to run a Kubernetes cluster at home. While they are several years old now, they’re still useful because of their low power consumption. Plus, I’m a cheapskate and I hate spending money, so I bought old PCs and I’ve upgraded them in every way I can.Continue reading “Adding multi-gigabit support to an HP EliteDesk G2 Mini”

Kubernetes Node Feature Discovery and Network Speed

For those of us who run Kubernetes on-premise on physical hardware, it is entirely possible that not all your nodes have the same hardware. For memory and CPU cores, Kubernetes magically does the right thing and each node advertises how many cores and how much memory it has, and workloads are scheduled on a nodeContinue reading “Kubernetes Node Feature Discovery and Network Speed”

Kubernetes Homelab Part 2: Networking

The next part of our look at my Kubernetes homelab is a deep dive into networking. If you haven’t read the other parts of this guide, I recommend you check those out too. On the surface, my network implementation is very simple. The cluster nodes, the NAS and the router are all on the same /24 privateContinue reading “Kubernetes Homelab Part 2: Networking”

New worst cabinet ever

A while back I wrote about the worst cabinet ever. Maybe this one isn’t as spectacular to behold, but there is a Cisco switch under all that spaghetti. There are also two PoE power injectors for wireless access points. All this is in a wooden cupboard and it was roasting hot. You can see thatContinue reading “New worst cabinet ever”

An easy way to generate an iptables config

This is a +1 for Easy Firewall Generator for iptables. Of course any self-respecting sysadmin should be able to set up iptables, but sometimes starting off can be tricky. So I use the this website, which lets you define the basics using a handful of checkboxes, and it generates a script that configures your computer’sContinue reading “An easy way to generate an iptables config”

An ugly fix

My home server seems to have developed a problem where its internal-facing network card “jams up”. It still keeps its IP address and everything looks normal, but in actual fact no traffic passes through it, cutting all my LAN hosts off from the Internet. Restarting iptables, network services or anything else doesn’t help. The onlyContinue reading “An ugly fix”