Linux/Docker/Docker-Compose

Basics

• https://docs.docker.com/compose/compose-file/
• Frequently used commands:

docker-compose build
docker-compose up
docker-compose up -d
docker-compose stop

Ubuntu testing

• build from Dockerfile
• keep running without task
• connect to bridge network "lan"

version: '3'
services:
  test123:
    build: .
    stdin_open: true

networks:
  default:
    external:
      name: lan

Volumes

version: '3'

services:
  web:
    build: .
    volumes:
      - /hostfilesystem:/containerfilesystem

Ports / Expose

• ports = expose to host network (external)
• expose = expose to container network (internal)

• hostport: 8080
• containerport: 80

version: "3"

services:
  wordpress:
    image: wordpress
    ports:
      - "8080:80"

    ports:
      - 139:139
      - 445:445
      - 137:137/udp
      - 138:138/udp

    ports:
      - 127.0.0.1:8000:8000

version: '3'
services:
  roundcube:
    image: robbertkl/roundcube
    expose:
      - 80

Autostart

version: '3'

services:
  portainer:
    image: portainer/portainer
    restart: always
    ports:
      - 127.0.0.1:9000:9000
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - portainer_data:/data

volumes:
  portainer_data:

Devices

version: '3'

services:
  mpd:
    build: .
    ports:
      - 6600:6600
    devices:
      - /dev/snd:/dev/snd

Run Command

version: '3'
services:
  certbot:
    image: certbot/certbot:latest
    command: ["certbot", "--version"]

Keep container running after command exits

version: '3'
services:
  certbot:
    image: certbot/certbot:latest
    command: tail -f /dev/null

OpenVPN

• "cap_add" = add capabilities (here for changing network settings)

version: '3'

services:
  openvpn:
    build: .
    ports:
      - 1194:1194
    cap_add:
     - NET_ADMIN