docker-compose.yml 的作用与说明

Docker Compose

Docker Compose是 docker 提供的一个命令行工具，用来定义和运行由多个容器组成的应用。使用 compose，我们可以通过在该多容器应用目录下以 YAML 文件(docker-compose.yml)声明式的定义应用程序的各个服务(容器)，之后便可在该应用目录下由单个命令docker compose up -d完成应用所有容器的创建和启动。

说明

image => 镜像
container_name => 容器名字
volume => 挂载目录
ports => 端口

在配置文件中我们能看到支撑应用运行的所有容器的详细信息。
下列文件 说明onlinejudgedeploy的运行，由四个容器的运行支撑起来：
oj-redis
oj-postgres
judge-server
oj-backend

version: "3"                                                                         
services:

  oj-redis:
    image: redis:4.0-alpine
    container_name: oj-redis
    restart: always
    volumes:
      - ./data/redis:/data
  
  oj-postgres:
    image: postgres:10-alpine
    container_name: oj-postgres
    restart: always
    volumes:
      - ./data/postgres:/var/lib/postgresql/data
    environment:
      - POSTGRES_DB=onlinejudge
      - POSTGRES_USER=onlinejudge
      - POSTGRES_PASSWORD=onlinejudge

  judge-server:
    image: registry.cn-hangzhou.aliyuncs.com/onlinejudge/judge_server
    container_name: judge-server
    restart: always
    read_only: true
    cap_drop:
      - SETPCAP
      - MKNOD
      - NET_BIND_SERVICE
      - SYS_CHROOT
      - SETFCAP
      - FSETID
    tmpfs:
      - /tmp
    volumes:
      - ./data/backend/test_case:/test_case:ro
      - ./data/judge_server/log:/log
      - ./data/judge_server/run:/judger
    environment:
      - SERVICE_URL=http://judge-server:8080
      - BACKEND_URL=http://oj-backend:8000/api/judge_server_heartbeat/
      - TOKEN=CHANGE_THIS
      # - judger_debug=1
   
  oj-backend:
    image: registry.cn-hangzhou.aliyuncs.com/onlinejudge/oj_backend
    container_name: oj-backend
    restart: always
    depends_on:
      - oj-redis
      - oj-postgres
      - judge-server
    volumes:
      - ./data/backend:/data
    environment:
      - POSTGRES_DB=onlinejudge
      - POSTGRES_USER=onlinejudge
      - POSTGRES_PASSWORD=onlinejudge
      - JUDGE_SERVER_TOKEN=CHANGE_THIS
      # - FORCE_HTTPS=1
      # - STATIC_CDN_HOST=cdn.oj.com
    ports:
      - "0.0.0.0:80:8000"
      - "0.0.0.0:443:1443"