Kubernetes Load Balancing

My notes on Kubernetes services and load balancing solutions for cloud and bare metal infrastructure.

11 Dec 2020

Docker Build Architectures

As soon as I deployed my first application on my pi k3s cluster, my deployment got stuck in an immediate crash/back-off loop. This turned out to be because the docker images were originally built a...

20 Nov 2020

Useful Ansible Commands

Jeff Geerling has lots of great resources on both Ansible and Kuberenetes. Here are some Ansible notes, I got mostly from watching his videos. Create / delete a user: ansible app -b -m user -a "n...

07 Oct 2020

Empty Ruby Templates

Rails has a neat template feature that lets you customise newly created rails apps. There is also the thoughbot suspenders gem that gives a very opinionated set of configuration options for new rai...

07 May 2020

Google Fu: Shutting Down Proxmox when you get a file lock error

Sometimes, Proxmox becomes unable to shutdown a VM. This is far more common if your OS doesn’t have the Qemu agent installed. To fix this: Open PVE shell rm /run/lock/qemu-server/lock-102.conf qm ...

02 May 2020

Ruby & the Multicore CPU: Part Five - Ruby 3.0 Concurrency & Parallelism

Ruby 3.0 is scheduled for release Christman 2020. The information below is subject to change. Ruby 3 is proposing two new concurrency abstractions. Guilds for CPU bottlenecks, and asynchronous Fib...

29 Apr 2020

Ruby & the Multicore CPU: Part Four - Current Concurrency Paradigms

Writing, debugging and maintaining safe multi-threaded code is notoriously difficult. Luckily, many useful gems and standard approaches have been created so that you don’t have to do all the heavy ...

29 Apr 2020