在这种特殊情况下，我可以使用Nginx作为反向代理吗? [英] Can I use nginx as reverse proxy in this particular case?

问题描述

我需要知道是否可以使用Nginx作为反向代理来服务在不同的Raspberry Pi中托管的每个Web应用程序.

I need to know if it is possible to use Nginx as a reverse proxy to serve several web apps hosted each one in a different Raspberry Pi.

从图中可以看出，Raspberry将全部连接到非托管交换机，这是我打算安装nginx的第一个交换机，因此它可以用作反向代理，具体取决于互联网请求的网站.例如:wwww.site1.com，www.site2.www等

As it can be seen in the diagram, the Raspberries will be all connected to an unmanaged switch, the first switch I intend to install nginx so it could serve as reverse proxy depending on the website requested from the internet. Ex: wwww.site1.com, www.site2.www, etc

这可能吗? 我能否从连接到调制解调器而不是交换机的计算机上访问那些RPis?

Is this possible? Will I be able to access those RPis from a computer connected to the modem, not to the switch?

注意:调制解调器是wifi调制解调器，而交换机是不受管理的有线交换机.

Note: The modem is a wifi modem and the switch is an unmanaged wired switch.

很抱歉，我的绘画技巧很差，感谢您的帮助.在购买所有这些东西之前，我需要知道这种想法是否可行.

Apologies for my poor drawing skills, and thanks for any help. I need to know if this idea is possible before buying all this stuff.

推荐答案

我认为有可能，但是有一些要求:

I think, it is possible, but there are some requrements:

• 分配给调制解调器的静态外部IP；

• static external IP assigned to Modem;

静态IP；

调制解调器上正确的转发规则.

correct forwarding rules on modem.

我的意思是，您需要转发所有如下请求:

I mean, you need forward all requests like the following:

调制解调器:80-> rp0:80

modem:80 -> rp0:80

调制解调器:443-> rp0:443

modem:443 -> rp0:443

在rp0上，端口可能与80和443不同，因此，请设置正确的规则，并在nginx配置中记录下来.

On rp0 ports may differ from 80 and 443, so, please, set up correct rules and note it in nginx config.

之后，在网站配置中设置上游或使用rp1-3的IP:

After that set up upstreams or use IP's of rp1-3 in websites configs:

upstream rp1 {
    server 192.168.1.11:port;
}
upstream rp2 {
    server 192.168.1.12:port;
}
upstream rp3 {
    server 192.168.1.13:port;
}

用端口替换端口，该端口在适当的RPi上侦听. 网站配置将如下所示:

Replace port with port, which is listened on apropriate RPi. Website configs will be like the following:

server {
server_name site1.com www.site1.com ;
location / { proxy_pass http://rp1 ; }
}
server {
server_name site2.com www.site2.com ;
location / { proxy_pass http://rp2 ; }
}

添加您需要的任何参数. 另外，如果您要托管一些静态网站，最好的方法是将它们也放置在rp0上.

Add any params you need. Also, if you are going to host some static websites, the best way is too place them on rp0.

编辑1 工作配置示例:

server {
listen 80;
server_name site1.com www.site1.com ;
location / { rewrite ^ https://$host$request_uri permanent;}
}

server {
listen              443 ssl;
server_name         site1.com www.site1.com;

ssl_certificate     /etc/letsencrypt/live/site1/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/site1/key.pem;
ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers         HIGH:!aNULL:!MD5;
location / {
    proxy_pass              http://rp1;
    proxy_set_header        Host $host;
    proxy_set_header        X-Real-IP $remote_addr;
    proxy_set_header        X-Forwarded-for $remote_addr;
    port_in_redirect        off;
    proxy_redirect          http://rp1/ /;
}

请注意，如果要使用Letsencrypt，最好的方法是在rp0上设置certbot(或其他).自动续订证书会更容易.另外，使用/etc/letsencrypt/live/site1/fullchain.pem . 为了使用多个SSL域，请确保安装Nginx支持SNI:

Please, note, if you are going to use Letsencrypt, the best way is to set up certbot (or smth else) on rp0. It will be easier to renew certs automatically. Also, use /etc/letsencrypt/live/site1/fullchain.pem . In order to use multiple SSL-domains, be sure that install nginx supports SNI:

# nginx -V
nginx version: nginx/1.14.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled

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