Conway's Life Server

A few years back I was experimenting with Go and SDL2, I wrote a dead-simple Conway's Game of Life program with it, added loading of a couple popular pattern file formats, and was pretty much finished with it. The other day I came across this cool project while preparing for Thanksgiving by browsing infosec.exchange . Brett has an e-ink display running life and is seeding it from tarpit data which struck me as a really neat idea to keep the world from becoming static as most of the more complex ones tend to do.

Rewriting HMS With SceneGraph

Back in 2017 I mentioned that the API I have been using for my Roku Home Media Server project was going to be replaced by SceneGraph and that I would need to rewrite things. That day finally arrived when my newer Roku players updated themselves to v11.5.0 and HMS quit loading. SceneGraph has lots of documentation, and lots of examples . Most of them are either too simplistic to be useful, or too complex to untangle for someone new to the framework, but experienced with the previous API.

Profiling osbuild-composer with Go pprof

One of the projects that I work on is osbuild-composer . This is an operating system image builder, written in Go, and is the replacement for the lorax-composer project. I’m going to skim over the details since this post is about profiling things, but you can read more about it at osbuild.org and the [GitHub repository]. Behind the scenes it uses DNF to handle depsolving and package queries. A few weeks back I wrote a patch to cache the results from the dnf-json program in order to speed up the response time when listing all the packages (over 63000 of them in Fedora 35!

Finding The Fuzzy Middle

It has been quite some time since I wrote about one of my longest running projects, MovieLandmarks . The UI hasn’t changed much in the intervening years. But the backend has been rewritten in Go, and the covers now come from TMDB instead of IMDB . Recently I decided I wanted the map to open to a view of the landmarks related to the move being passed to it using the #mv-XXXX hash.

Upgrading A PostgreSQL Jail

I had an older PostgreSQL 12 install using FreeBSD jails and ZFS. It was setup using iocage on FreeBSD 12.1, and I wanted to upgrade to FreeBSD 13.0 and PostgreSQL 14. I could have done a normal freebsd-update but that would end up wasting a bunch of space on top of the clone that iocage creates. Doing that is fine for minor updates but in this case it is better to delete the jail and recreate it using the new FreeBSD release and PostgreSQL version.

Router Upgrade From Hell

The day started with a plan. I would upgrade to the latest OpenWRT release with minimal disruption to the home internet, planning out the steps beforehand, and being careful not to totally mess things up. And as always reality had other ideas about how the day would go. The Original Plan I’m running OpenWRT on a PC Engines APU4 with way more disk space than it needs. The APU4 boots from the SSD like a traditional PC, not like a router booting from dedicated Flash storage, so I wasn’t sure exactly how the OpenWRT upgrade procedure would work and I wanted to make sure I had a working install to fall back on.

Running Prusa Slicer From A Rootless Podman Container

A while back Jessie Frazelle wrote a neat blog post on running desktop applications using Docker containers. It ends up that it isn’t too hard to run X clients in containers using podman or Docker . Now that I have Alpine Linux running on my laptop I need to get rootless podman setup so I can run applications that aren’t included in the Alpine distribution. Podman is a Docker compatible container engine that doesn’t require a daemon, and can run as a user without any need for root access.

An Alpine Adventure

The Ansible playbooks for this article can be found here I have a laptop that I use for experimenting with different operating systems. I’ve used it to run various Linux distributions, as well as FreeBSD and OpenBSD. I tend to set it up by hand, use it for a while, then reinstall with something new. In the most recent iteration of this I’ve used Alpine Linux to see if it would be suitable distribution for more than a container runtime.

Static git hosting with stagit

I like hosting my own services when possible. But I don’t like maintaining complex systems, so instead of setting up my own GitLab, Gitea, or Gogs service I decided to follow the same path I took with this blog and host some of my git repos as static html pages using stagit . One of the neat features of git is that you can actually clone from one of these static repos so they aren’t just html pages but are full copies of the git repo, complete with history.

Weather TL;DR

What is it? Weather TL;DR is a simple weather forecast webapp using data from the weather.gov system. This was an experiment to see if I could write a simple webapp to tell me the current weather forecast in a compact and simple page. How do you use it? Usage it pretty simple. It will ask you if it is ok to use your location data. If you don’t agree then it presents a simple form where you can manually enter a latitude and longitude in decimal form.