参考官网:https://docs.docker.com/compose/gettingstarted/
1. 创建测试目录,放测试文件
mkdir composetest
cd composetest
2. 当前目录创建app.py
import time import redis from flask import Flask app = Flask(__name__) cache = redis.Redis(host=‘redis‘, port=6379) def get_hit_count(): retries = 5 while True: try: return cache.incr(‘hits‘) except redis.exceptions.ConnectionError as exc: if retries == 0: raise exc retries -= 1 time.sleep(0.5) @app.route(‘/‘) def hello(): count = get_hit_count() return ‘Hello World! I have been seen {} times.\n‘.format(count)
3. 当前目录创建requirements.txt文件
flask redis
4. 当前目录创建一个Dockerfile
# syntax=docker/dockerfile:1 FROM python:3.7-alpine WORKDIR /code ENV FLASK_APP=app.py ENV FLASK_RUN_HOST=0.0.0.0 RUN apk add --no-cache gcc musl-dev linux-headers COPY requirements.txt requirements.txt RUN pip install -r requirements.txt EXPOSE 5000 COPY . . CMD ["flask", "run"]
5. 当前目录创建文件docker-compose.yml
version: "3.9" services: web: build: . ports: - "5000:5000" redis: image: "redis:alpine"
6. 当前目录执行docker-compose up
7. 启动完成,浏览器打开http://localhost:5000/