docker-compose.yml

---
version: '3'
services:
  server:
    image: rancher/k3s:v1.0.0
    command: server --disable-agent
    environment:
      - K3S_CLUSTER_SECRET=somethingtotallyrandom
      - 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
    ports:
      - 6443:6443

  node:
    image: rancher/k3s:v1.0.0
    tmpfs:
      - /run
      - /var/run
    privileged: true
    environment:
      - K3S_URL=https://server:6443
      - K3S_CLUSTER_SECRET=somethingtotallyrandom

  postgres:
    image: postgres:12
    environment:
      POSTGRES_PASSWORD: mypassword
    volumes:
      - pgdata:/var/lib/postgresql/data

  mysql:
    image: mysql:8
    environment:
      MYSQL_ROOT_PASSWORD: mypassword
    volumes:
      - mysqldata:/var/lib/mysql

volumes:
  k3s-server: {}
  pgdata: {}
  mysqldata: {}