node.js - Nginx 与 dockerized NodeJS

Question

我有一个 NodeJS 应用程序，它是 dockerized 的，我有一个 NGINX docker 容器，它在 docker 容器中的 NodeJS 进程之间进行负载平衡。我能够成功地 curl 两个 NodeJs 服务器，但 NGINX 找不到上游服务器。

这是 nginx 配置文件:

upstream app {
    least_conn;              # Use Least Connections strategy
    server 127.0.0.1:3000;   # NodeJS Server 1
    server 127.0.0.1:3001;   # NodeJS Server 2
}
server {
    listen 80;
    server_name example.com;

    access_log /var/log/nginx/example.com-access.log;
    error_log  /var/log/nginx/example.com-error.log error;

    # Browser and robot always look for these
    # Turn off logging for them
    location = /favicon.ico { log_not_found off; access_log off; }
    location = /robots.txt  { log_not_found off; access_log off; }

    # Handle static files so they are not proxied to NodeJS
    # You may want to also hand these requests to other upstream
    # servers, as you can define more than one!
    location ~* (images/|img/|javascript/|js/|css/|stylesheets/|flash/|media/|static/|robots.txt|humans.txt|favicon.ico) {
      root /usr/share/nginx/html;
    }

    # pass the request to the node.js server
    # with some correct headers for proxy-awareness
    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        proxy_pass http://app/;
        proxy_redirect off;

        # Handle Web Socket connections
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # Proxy requests to the mobile api to the mobile api servers (old version of Android App uses m.goodrx.com URLs)
    location /mobile-api {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_set_header X-NginX-Proxy true;

        proxy_pass http://www.goodrx.com/mobile-api;
        proxy_redirect off;

        # Handle Web Socket connections
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

然后我启动绑定(bind)端口 3000 和 3001 的 Node 容器以及绑定(bind)端口 80 的 nginx 容器。当 curl 127.0.0.1:80 时，我收到一个错误请求，但 curl 127.0.0.1:3000 和 127.0.0.1:3001 有效。知道 NGINX 代理可能出了什么问题吗？

Answer 1

127.0.0.1，或者localhost指向nginx容器。你可以查看我的回答here但基本上你需要用 --add-host docker:<IP ADDRESS> 运行 nginx 容器，然后更改您的 nginx 配置:

upstream app {
    least_conn;              # Use Least Connections strategy
    server docker:3000;   # NodeJS Server 1
    server docker:3001;   # NodeJS Server 2
}