Docker Compose 简介

Docker 进阶

Mike Metzger

Data Engineering Consultant

什么是 Docker Compose？

Docker 的额外命令行工具
定义并管理多容器应用
在单个文件中指定容器、网络和数据卷
- compose.yml 或 compose.yaml
- 旧版文件可能名为 docker-compose.yaml
便于分享/演示应用

compose.yaml 示例

# 定义服务
services:

  # 按名称定义容器
  webapp:
    image: "webapp"

    # 可选：定义端口映射
    ports:
      - "8000:5000"

  # 定义其他所需容器
  redis:
    image: "redis:alpine"

启动应用

docker compose up
- 旧系统使用 docker-compose up
- docker compose -f <yaml> up
- docker compose up -d

$ docker compose up

[+] Running 2/0
 ✔ Network composetest_default    Created
 ✔ Container composetest-redis-1  Created                                                                                                             0.0s
 ✔ Container composetest-web-1    Created                                                                                                             0.0s
Attaching to redis-1, web-1
redis-1  | 1:C 11 Mar 2024 04:09:51.754 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
web-1    |  * Serving Flask app 'app.py'
web-1    |  * Running on http://127.0.0.1:5000

查看应用状态

docker compose ls

$ docker compose ls

NAME                STATUS              CONFIG FILES
webapp              running(2)          /webapp/docker-compose.yml

停止应用

docker compose down
- docker-compose down
- docker compose -f <yaml> down

$ docker compose down

[+] Running 3/3
 ✔ Container composetest-redis-1  Removed                                                                                                             0.1s
 ✔ Container composetest-web-1    Removed                                                                                                            10.1s
 ✔ Network composetest_default    Removed                                                                                                             0.1s

让我们来练习！

Docker 进阶