flask文件

app.py

  1. from flask import Flask
  2. from redis import StrictRedis
  3. import os
  4. import socket
  6. app = Flask(__name__)
  7. redis = StrictRedis(host=os.environ.get('REDIS_HOST', '127.0.0.1'),
  8.                     port=6379, password=os.environ.get("REDIS_PASS"))
  11. @app.route('/')
  12. def hello():
  13.     redis.incr('hits')
  14.     return f"Hello Container World! I have been seen {redis.get('hits').decode('utf-8')} times and my hostname is {socket.gethostname()}.\n"

Dockerfile

  1. FROM python:3.9.5-slim
  3. RUN pip install flask redis && \
  4.     groupadd -r flask && useradd -r -g flask flask && \
  5.     mkdir /src && \
  6.     chown -R flask:flask /src
  8. USER flask
  10. COPY app.py /src/app.py
  12. WORKDIR /src
  14. ENV FLASK=app.py REDIS_HOST=redis
  16. EXPOSE 5000
  18. CMD ["flask", "run", "-h", "0.0.0.0"]

nginx

nginx.conf

  1. server {
  2.   listen  80 default_server;
  3.   location / {
  4.     proxy_pass http://flask:5000;
  5.   }
  6. }

.dockerignore

  1. .DS_Store
  2. .idea
  3. .git
  4. .gitignore
  5. .env
  6. .dockerignore
  7. Dockerfile
  8. docker-compose.yaml
  9. nginx.conf
  10. var

docker-compose.yml

  1. version: "3.8"
  3. services:
  4.   flask:
  5.     build:                        # 构建 属于自己的 flask程序
  6.       context: ./flask            # 到那个文件夹下面构建
  7.       dockerfile: Dockerfile      # 读取 dockerfile 的名字叫: Dockerfile
  8.     image: flask-demo:latest      # 这里起到命名的作用
  9.     environment:                  # 设置环境变量
  10.       - REDIS_HOST=redis-server
  11.       - REDIS_PASS=${REDIS_PASSWORD}
  12.     healthcheck:
  13.       test: ["CMD", "curl", "-f", "http://localhost:5000"]
  14.       interval: 30s
  15.       timeout: 3s
  16.       retries: 3
  17.       start_period: 40s
  18.     depends_on:
  19.       redis-server:
  20.         condition: service_healthy
  21.     networks:                     # 连接网络为 backend frontend
  22.       - backend
  23.       - frontend
  25.   redis-server:
  26.     image: redis:latest           # 拉取 redis:latest
  27.     command: redis-server --requirepass ${REDIS_PASSWORD}
  28.     healthcheck:
  29.       test: ["CMD", "redis-cli", "ping"]
  30.       interval: 1s
  31.       timeout: 3s
  32.       retries: 30
  33.     networks:                     # 连接网络为 backend
  34.       - backend
  36.   nginx:
  37.     image: nginx:stable-alpine    # 拉取 nginx
  38.     ports:                        # 将 80端口 映射 为 8000端口
  39.       - 8000:80
  40.     depends_on:                   # depends_on 启动顺序  只要 flask先启动后  此程序才能启动
  41.       flask:
  42.         condition: service_healthy
  43.     volumes:
  44.       - C:\Users\CZC\Desktop\docker_project\M-docker-compose-scale-new\nginx\nginx.conf:/etc/nginx/conf.d/default.conf:ro
  45.       - C:\Users\CZC\Desktop\docker_project\M-docker-compose-scale-new\var\log\nginx:/var/log/nginx  # /var/log/nginx
  46. #      - ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf:ro  # 将 /etc/nginx/conf.d/default.conf 映射 到 ./nginx/nginx.conf  ro:readonly只读  rw:读写
  47. #      - ./var/log/nginx:/var/log/nginx  # /var/log/nginx 映射 到 ./var/log/nginx 上
  48.     networks:                     # 连接网络为 frontend
  49.       - frontend
  51. networks:
  52.   backend:
  53.   frontend:

.env

  1. REDIS_PASSWORD=56248123

验证替换的效果

  1. docker-compose config

如果 .env 改名字 可以指定名字

比如改成 myenv

  1. docker-compose --env-file .\myenv config