k3s

Website k3s docs

• No debian package/repo so far
• AUR packages available

Requirements

Minimal K3S requirements:

	Server / Control plane	Agent / Node
Disk space	15 GB	15 GB
RAM	2 GB	512 MB
CPU	2 cores	1 core

Installation

curl2bash

curl -sfL https://get.k3s.io | sh -
sudo k3s kubectl get node

Uninstall:

/usr/local/bin/k3s-uninstall.sh

Usage

• Manual upgrades

Use k3s crictl cmd:

k3s crictl images

Manually prune unused images:

k3s crictl rmi --prune

Resource usage

• K3s Resource Profiling
• Profiling Lightweight Container Platforms:MicroK8s and K3s in Comparison to Kubernetes
• CPU and memory usage of k3s

k3s components

networking

https://rancher.com/docs/k3s/latest/en/networking/

Tailscale integration

• Integration with the Tailscale VPN provider

servicelb

• based on klipper-lb
• srvclb without traefik only starts lb pods on demand

CoreDNS

• Website
• CoreDNS docs
• k3s docs: coredns

Customizing CoreDNS

• K8s docs: Customizing DNS Service
• k3s coredns Corefile imports config files from /etc/coredns/custom/*.server
• If the configMap coredns-custom is present, it will get mounted to /etc/coredns/custom and imported by the main Corefile

k3s wrappers / installers

• k3sup

k3d

k3s in docker: k3d

K3s terraform module

https://registry.terraform.io/modules/xunleii/k3s/module/latest

K3s ansible module

• https://github.com/k3s-io/k3s-ansible

Issues