Docker-compose

Used to run multiple containers on same host

Outdated better to use docker stack/kubernetes now apparently

Commands

Cmd	Effect
docker-compose up	Run containers
docker-compose build	Build containers
docker-compose exec {service name} sh	Enter service shell

Setup

The Compose file is a YAML file defining services, networks and volumes. The default path for a Compose file is ./docker-compose.yml.

docker-compose.yml

version: "3"
services:
  node_backend:
    build: ./backend
    ports: 
      - "3001:3001"
    volumes:
      - ./backend:/app

  react_frontend:
    build: ./client
    ports: 
      - "3000:3000"
    volumes:
      - ./client:/app

Config Options

build

build can be specified either as a string containing a path to the build context

image

build: ./dir
image: webapp:tag

This results in an image named webapp and tagged tag, built from ./dir.