Docker Compose

What?

Docker compose is a tool for designing and running multi-container applications.

Why?

Docker Compose is mostly used as a helper when you want to start multiple Docker containers and doesn't want to start each one separately using.

For example, suppose you had an application which required NGNIX and MySQL, you could create one file which would start both the containers as a service without the need to start each one separately.

How to install?

Click to download Docker.

If you using windows and mac os then no need install docker compose spretally. But for other operating system then install using PIP command (python)

pip install -U docker-compose

How to check is installed?

• docker-compose version
• docker-compose --version
• docker-compose -v

How to create docker compose file?

version: '3.3'

services:
  ui:
    image: nginx:alpine
    container_name: UI
    restart: always
    ports:
      - 5000:80
    volumes:
      - .:/usr/share/nginx/html

  db:
    container_name: MongoDB
    image: mongo:latest
    restart: always
    ports:
      - 27017:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: root

  mongo-express:
    container_name: MongoDB-Express
    image: mongo-express:latest
    restart: always
    ports:
      - 8081:8081
    environment:
      ME_CONFIG_MONGODB_ADMINUSERNAME: root
      ME_CONFIG_MONGODB_ADMINPASSWORD: root

Basic Commands

• docker-compose up
• docker-compose ps
• docker-compose down