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Docker composer

docker run container_name/app_name

docker run mongodb

docker run redis:alpine

docker run ansible

user docker composer run complex applications

docker-compose.yml

services:
  web:
    image: "contaimer_name/app"
  database:
    image: "mongodb"
  messaging:
    image: "redis:alpine"
  orchestration:
    image: "ansible"
docker-compose up
  • docker run multiple applications
docker run -d --name=redis redis

docker run -d --name=db postgres:9.4 result-app

docker run -d --name=vote -p 5000:80 voting-app

docker run -d --name=result -p 5001:80

docker run -d --name=worker worker
  • docker run --links link applications
docker run -d --name=redis redis

docker run -d --name=db postgres:9.4 --link db:db result-app

docker run -d --name=vote -p 5000:80 --link redis:redis voting-app

docker run -d --name=result -p 5001:80

docker run -d --name=worker --link db:db --link redis:redis worker
  • docker compose
redis:
  image: redis
db:
  image: postgres: 9.4
vote:
  image: voting-app
  ports:
    - 5000:80
  links:
    - redis

result:
  image: result-app
  ports:
    - 5001:80
  links:
    - db

worker:
  image: worker
  links:
    - redis
    - db
  • run compose file
docker-conpose up

Docker compose - build​

redis:
  image: redis
db:
  image: postgres: 9.4
vote:
  build: ./vote
  ports:
    - 5000:80
  links:
    - redis

result:
  build: ./result
  ports:
    - 5001:80
  links:
    - db

worker:
  image: worker
  links:
    - redis
    - db

Docker compose -version​

  • version 1
redis:
  image: redis
db:
  image: postgres: 9.4
vote:
  build: ./vote
  ports:
    - 5000:80
  links:
    - redis
  • version 2
version: 2
services:
  redis:
    image: redis

    networks:
      - back-end
  db:
    image: postgres: 9.4
    network:
      - backend-end
  vote:
    build: ./vote
    network:
      - front-end
      - back-end

  result:
    image: result
    network:
      - front-end
      - back-end

networks:
  front-end:
  back-end:
  • version 3
version: 3
services:
  redis:
    image: redis
  db:
    image: postgres: 9.4
  vote:
    build: ./vote
    ports:
      - 5000:80

valuable commands​

# clean workspace

-docker container rm $(docker container ls -aq) # remove all containers

-docker rmi $(docker images -q) # remove all images

version: "3.8"
services:
  web:
    build: ./frontend
    ports:
      - 3000:3000
  api:
    build: ./backend
    ports:
      - 3001:3001
    environment:
      - DB_URL: mongodb://db/db_name
  db:
    image: mongo:4.0-xenial
    ports:
      - 27017:27017
    volumes:
      - mongo-data:/data/db

volumes:
  mongo-data: