Dockerized Nginx 反向代理和 Flask 应用程序，如何配置？

Question

我在 Nginx 反向代理后面部署一个简单的 Flask 应用程序时遇到问题。该应用程序位于 https://docs.docker.com/compose/gettingstarted/

我正在尝试让该应用程序显示在 subdomain.example.com/flask，但在当前配置下它不起作用。我缺少什么？

现在我的 docker-compose.yml 看起来像这样：

version: '3'
services:
  nginx:
    container_name: nginx
    build:
      context: ./nginx
    volumes:
      - ./config/:/etc/nginx/
      - ./ssl-cert/:/etc/ssl/private/
    depends_on:
      - web
    ports:
      - 80:80

  web:
    build:
      context: ./composetest
    expose:
      - 5000

  redis:
    image: "redis:alpine"

这是我的 Nginx default.conf:

server {
    listen              80;
    server_name         subdomain.example.com;

    location /flask{
        proxy_pass http://web:5000;
    }

}

当我这样做时 docker-compose up --build 我没有从 Nginx 容器或其他容器中得到任何错误（显然忽略了与生产就绪相关的错误）。

这是我在运行上面提到的命令时看到的：

redis_1       | 1:C 16 May 2021 14:08:42.327 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
redis_1       | 1:C 16 May 2021 14:08:42.335 # Redis version=6.2.3, bits=64, commit=00000000, modified=0, pid=1, just started
redis_1       | 1:C 16 May 2021 14:08:42.335 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
redis_1       | 1:M 16 May 2021 14:08:42.336 * monotonic clock: POSIX clock_gettime
redis_1       | 1:M 16 May 2021 14:08:42.337 * Running mode=standalone, port=6379.
redis_1       | 1:M 16 May 2021 14:08:42.337 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
redis_1       | 1:M 16 May 2021 14:08:42.337 # Server initialized
redis_1       | 1:M 16 May 2021 14:08:42.337 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
redis_1       | 1:M 16 May 2021 14:08:42.338 * Ready to accept connections
web_1         |  * Serving Flask app 'app.py' (lazy loading)
web_1         |  * Environment: production
web_1         |    WARNING: This is a development server. Do not use it in a production deployment.
web_1         |    Use a production WSGI server instead.
web_1         |  * Debug mode: off
web_1         |  * Running on all addresses.
web_1         |    WARNING: This is a development server. Do not use it in a production deployment.
web_1         |  * Running on http://192.168.112.4:5000/ (Press CTRL+C to quit)

Answer 1

您需要为 nginx 服务设置 ports 指令。即使默认情况下端口由图像公开，它们也不会自动绑定到主机，如 ports.

services:
  nginx:
    container_name: nginx
    build:
      context: ./nginx
    volumes:
      - ./config/:/etc/nginx/
      - ./ssl-cert/:/etc/ssl/private/
    depends_on:
      - web
    ports:
      - "80:80"

之后，您应该可以在 http://localhost

访问 nginx

Answer 2

我认为一切都很好，你从你的 web 容器中暴露端口 5000 并且你在 nginx 容器的端口 80 上列出

您应该可以将端口 80 连接到您的本地计算机。

只需在 depends_on 下添加：重建测试，它应该可以正常工作

ports:
      - "80:80"

添加子域：subdomain.example.com 也在您的本地计算机上的 /etc/hosts 下，如果您使用 ubuntu debian 机器。通过使用任何文本编辑器添加主机 vim nano ...

127.0.0.1subdomain.example.com

从您的浏览器保存并提供服务。

Dockerized Nginx 反向代理和 Flask 应用程序，如何配置？

Dockerized Nginx reverse proxy and Flask app, how to config?

docker

docker-compose

nginx-reverse-proxy

nginx-config