---

• running multiple docker containers and network them can be tedious
• docker compose is a structured way of doing this
• default file at root docker-compose.yaml

version: '3' # version of docker compose
services:
  redis-older: # name of container
    image: redis:4.0 # image from docker hub
    ports:
      - 6000:6379 # host port 6000 --> container port 6379
      - 8000:6379
    environment: # env variables, found on dockerhub doc for image
      - USERNAME=admin
      - PASSWORD=password
    networks:
      - common

volumes:
  mysql:

# if no network name to be provided
# docker compose will create a common docker env for all the services in the file
networks:
  common:
    name: my_docker_network

# default file at root `docker-compose.yaml`
docker compose up <service-1> <service-2>

# creates a common docker network and starts all containers in it
docker-compose -f <filename>.yaml up

# stops all containers and tears down the docker network
docker-compose -f <filename>.yaml down

# deltes unused docker images
docker system prune -f

docker compose exec cd bash