What is the difference between docker and docker-compose

Question

docker and docker-compose seem to be interacting with the same dockerFile, what is the difference between the two tools?

Answer 1

docker manages single containers

docker-compose manages multiple container applications

Usage of docker-compose requires 3 steps:

1. Define the app environment with a Dockerfile
2. Define the app services in docker-compose.yml
3. Run docker-compose up to start and run app

Below is a docker-compose.yml example taken from the docker docs:

services:
  web:
    build: .
    ports:
    - "5000:5000"
    volumes:
    - .:/code
    - logvolume01:/var/log
    links:
    - redis
  redis:
    image: redis
volumes:
  logvolume01: {}