docker Dockerfile文件制作自己的鏡像的方法

2024-09-01 13:56:10

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1.創建空目錄

$ cd /home/xm6f/dev $ mkdir myapp$ cd myapp/

2.vim Dockerfile，內容如下：

## 一個基礎的 python 運行環境FROM python## 設置工作目錄WORKDIR /app## 將當前系統文件夾內容復制到容器的 app 目錄ADD . /app## 安裝必要的依賴包RUN pip install -r softwares.txt## 開放端口，供容器外訪問EXPOSE 80EXPOSE 3088EXPOSE 8080EXPOSE 8066## 定義環境變量ENV NAME HELLO## 運行命令CMD ["python","app.py"]

3.安裝依賴

vim softwares.txt，內容如下：

FlaskRedis

4.vim app.py，內容如下：

from flask import Flaskfrom redis import Redis, RedisErrorimport osimport socket# Connect to Redisredis = Redis(host="redis", db=0, socket_connect_timeout=2, socket_timeout=2)app = Flask(__name__)@app.route("/")def hello(): try:  visits = redis.incr("counter") except RedisError:  visits = "<i>cannot connect to Redis, counter disabled</i>"  html = "<h3>Hello {name}!</h3>" /   "<b>Hostname:</b> {hostname}<br/>" /   "<b>Visits:</b> {visits}" return html.format(name=os.getenv("NAME", "world"), hostname=socket.gethostname(), visits=visits)if __name__ == "__main__": app.run(host='0.0.0.0', port=80)

5.編譯

$ docker build -t myfirstapp .

6.查看新生成了一個image

$ docker imagesREPOSITORY     TAG     IMAGE ID   CREATED    SIZEmyfirstapp     latest    01ea1129a831  2 hours ago   699MB

7.啟動image

$ docker run -p 4000:80 myfirstapp

也可以放在后臺運行:

$ docker run -d -p 4000:80 myfirstapp

8.訪問服務

# curl http://localhost:4000<h3>Hello world!</h3><b>Hostname:</b> a6655d0d7e74<br/><b>Visits:</b> <i>cannot connect to Redis, counter disabled</i>

或者瀏覽器訪問服務：http://192.168.1.160:4000

9.查看當前運行的鏡像

$ docker psCONTAINER ID MAGE   COMMAND   CREATED  STATUS  PORTS     NAMES2db45cab2bb4 myfirstapp "python app.py" 2 minutes ago Up 2 minutes 0.0.0.0:4000->80/tcp elastic_wilson

10.停止鏡像