k0s-raspberrypi

⚙️ Raspberry Pi setup:

The following configurations provide good performance for the rpi4.

#/boot/firmware/config.txt
#overclock configuration
over_voltage=6 
arm_freq=2000
gpu_freq=600

sdram_freq=550

#other stuff
boot_delay=0
dtparam=watchdog=on
gpu_mem=32

You also need to add this to be able to use containers.

#/boot/firmware/cmdline.txt
cgroup_memory=1 cgroup_enable=memory

🔄 Update your Pi

sudo apt update
sudo apt upgrade

🚀 Installing k0s

# 📝Check https://docs.k0sproject.io/stable/install/ for up to date information
curl --proto '=https' --tlsv1.2 -sSf https://get.k0s.sh | sudo sh
sudo k0s install controller --single #This creates a single controlplane/worker node
sudo systemctl enable --now k0scontroller
sudo k0s status #may take a while

🧰 Configure kubectl

mkdir -p ~/.kube
sudo k0s kubeconfig admin > ~/.kube/config
sudo apt install kubernetes-client
# if you don't want to install kubectl you can alternatively use this:
sudo k0s kubectl

🧪 Test Deployment: Nginx

Create a deployment and service to test your setup:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-svc
spec:
  type: NodePort
  selector:
    app: nginx
  ports:
    - port: 80
      targetPort: 80
      nodePort: 30080