docker-compose.yaml

# to run define K3S_TOKEN, K3S_VERSION is optional, eg:
#   K3S_TOKEN=${RANDOM}${RANDOM}${RANDOM} docker-compose up

version: '3.7'
services:
  docker.local:
    image: 'registry:2'
    ports:
      - 5000:5000

  k3s-server:
    image: 'rancher/k3s'
    command: server
    tmpfs:
      - /run
      - /var/run
    ulimits:
      nproc: 65535
      nofile:
        soft: 65535
        hard: 65535
    privileged: true
    restart: always
    environment:
      - K3S_TOKEN=${K3S_TOKEN:?err}
      - K3S_KUBECONFIG_OUTPUT=/output/kubeconfig.yaml
      - K3S_KUBECONFIG_MODE=666
    volumes:
      - k3s-server:/var/lib/rancher/k3s
      # This is just so that we get the kubeconfig file out
      - .:/output
      - ./registries.yaml:/etc/rancher/k3s/registries.yaml
    ports:
      - 6443:6443 # Kubernetes API Server
      - 80:80 # Ingress controller port 80
      - 443:443 # Ingress controller port 443
      - 8080:8080
      - 8443:8443

  k3s-agent:
    image: 'rancher/k3s'
    tmpfs:
      - /run
      - /var/run
    ulimits:
      nproc: 65535
      nofile:
        soft: 65535
        hard: 65535
    privileged: true
    restart: always
    environment:
      - K3S_URL=https://k3s-server:6443
      - K3S_TOKEN=${K3S_TOKEN:?err}
    volumes:
      - ./registries.yaml:/etc/rancher/k3s/registries.yaml

volumes:
  k3s-server: {}