docker-compose.yml

version: '3'

services:
  control:
    image: ubuntu:20.04
    hostname: control
    volumes:
      - ./shared:/shared
    networks:
      - lab_net
    command: >
      bash -c "
        apt-get update &&
        apt-get install -y openssh-server sudo &&
        echo 'root:password' | chpasswd &&
        sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config &&
        service ssh start &&
        tail -f /dev/null
      "

  node1:
    image: ubuntu:20.04
    hostname: node1
    networks:
      - lab_net
    ports:
      - "7001-7003:8001-8003"
    command: >
      bash -c "
        apt-get update &&
        apt-get install -y openssh-server sudo &&
        echo 'root:password' | chpasswd &&
        sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config &&
        service ssh start &&
        tail -f /dev/null
      "

  node2:
    image: ubuntu:20.04
    hostname: node2
    networks:
      - lab_net
    ports:
      - "8001-8003:8001-8003"
    command: >
      bash -c "
        apt-get update &&
        apt-get install -y openssh-server sudo &&
        echo 'root:password' | chpasswd &&
        sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config &&
        service ssh start &&
        tail -f /dev/null
      "

  node3:
    image: ubuntu:20.04
    hostname: node3
    networks:
      - lab_net
    ports:
      - "9001-9003:8001-8003"
    command: >
      bash -c "
        apt-get update &&
        apt-get install -y openssh-server sudo &&
        echo 'root:password' | chpasswd &&
        sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config &&
        service ssh start &&
        tail -f /dev/null
      "

networks:
  lab_net:
    driver: bridge