Nginx反向代理上游不起作用 [英] Nginx Reverse Proxy upstream not working

问题描述

我在弄清楚Nginx上的负载平衡时遇到了麻烦.我正在使用: -Ubuntu 16.04和 -Nginx 1.10.0.

I'm having trouble figuring out load balancing on Nginx. I'm using: - Ubuntu 16.04 and - Nginx 1.10.0.

简而言之，当我将我的IP地址直接传递到"proxy_pass"时，代理有效:

In short, when I pass my ip address directly into "proxy_pass", the proxy works:

server {
    location / {
            proxy_pass http://01.02.03.04;
    }
}

当我访问代理计算机时，可以从代理ip中看到内容... 但是当我使用上游指令时，它不会:

When I visit my proxy computer, I can see the content from the proxy ip... but when I use an upstream directive, it doesn't:

upstream backend {
     server 01.02.03.04;
}

server {
    location / {
            proxy_pass http://backend;
    }
}

当我访问代理计算机时，会看到默认的Nginx服务器页面，而不是上游IP地址中的内容.

When I visit my proxy computer, I am greeted with the default Nginx server page and not the content from the upstream ip address.

任何进一步的帮助将不胜感激.我已经做了大量研究，但无法弄清楚为什么上游"不起作用.我没有任何错误.它只是不代理.

Any further assistance would be appreciated. I've done a ton of research but can't figure out why "upstream" is not working. I don't get any errors. It just doesn't proxy.

推荐答案

好的，看起来我找到了答案...

Okay, looks like I found the answer...

关于后端服务器的两件事，至少在使用IP地址时在上述情况下如此:

two things about the backend servers, at least for the above scenario when using IP addressses:

1. 必须指定端口
2. 端口不能为:80(根据@karliwsn，端口可以为80，这只是上游服务器无法侦听与反向代理相同的端口.我尚未对其进行测试，但要注意).

后端服务器块应配置如下:

backend server block(s) should be configured as following:

server {

    # for your reverse_proxy, *do not* listen to port 80
    listen 8080;
    listen [::]:8080;

    server_name 01.02.03.04;

    # your other statements below
    ...
}

您的反向代理服务器块的配置应如下所示:

and your reverse proxy server block should be configured like below:

upstream backend {
    server 01.02.03.04:8080;
}

server {
    location / {
        proxy_pass http://backend;
     }
}

似乎后端服务器正在监听:80，反向代理服务器不呈现其内容.我想这是有道理的，因为服务器实际上正在为普通大众使用默认端口80.

It looks as if a backend server is listening to :80, the reverse proxy server doesn't render it's content. I guess that makes sense, since the server is in fact using default port 80 for the general public.

感谢@karliwson促使我重新考虑端口.

Thanks @karliwson for nudging me to reconsider the port.

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