Docker Compose 入門

Docker 中級

Mike Metzger

Data Engineering Consultant

什麼是 Docker Compose？

Docker 的額外指令工具
定義並管理多容器應用程式
在單一檔案指定容器、網路與儲存卷
- compose.yml 或 compose.yaml
- 舊版可能命名為 docker-compose.yaml
便於分享／示範應用程式

compose.yaml 範例

# Define the services
services:

  # Define the container(s), by name
  webapp:
    image: "webapp"

    # Optionally, define the port forwarding
    ports:
      - "8000:5000"

  # Define any other containers required
  redis:
    image: "redis:alpine"

啟動應用程式

docker compose up
- 舊版系統用 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

檢查應用程式狀態

docker compose ls

$ docker compose ls

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

停止應用程式

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

一起來練習吧！

Docker 中級