This is my GitOps repository for my home cluster. Not included here are the Ansible playbooks to setup and update all the nodes.

Setup

Please have a look into the documentation

Hardware

I use a cluster of seven Raspberry PIs. Three for the controlplane and the other four as worker nodes. After some time added two small Lenovo Thinkcentres inspired by TinyMiniMicro.

You can find more details here.

copy volume to volume with rsync

rsync -azP source/ destination

-a: archive include -r (recursive for folders) and preserves symbolic links, special and device files, modification times, groups, owners and permissions

-z: compression Useful if used over the network

-P: progress & partial

-nv: dryrun and verbose

trailing slash (/) on source is important otherwise itself will be moved as well

Benchmarks

Storage

kbench with compare to local-path: https://github.com/yasker/kbench#deploy-comparison-benchmark-in-kubernetes-cluster

Network

Install iperf with sudo apt-get install iperf

Initialize server with iperf -s -> listens on port 5001

Start test on client with iperf -c <server-ip>

Options:

-p to change default port

Reference: https://www.baeldung.com/linux/iperf-measure-network-performance

Tools zu installieren:

• git clone https://github.com/yasker/kbench.git
• iperf
• fio
• jq