reverse proxy to multiple URLs with same ws port number

[tnachy]

hi,

I have an application that needs to provide reverse proxy to two similar machine that host a basic web page with ws that uses port 5300. So my nginx server's URL is https://thisserver and my machines will have http://ip1 and http://ip2 and both machines will also use port 5300 for websocket.

So in nginx, here is my setup

server {
        listen 5443 ssl;
        server_name  _;
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        include /etc/nginx/mime.types;

        ## some SSL settings here...

        location / {
            proxy_pass "http://ip1";
        }
    }

 server {
        listen  6443 ssl;
        server_name  _;
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        include /etc/nginx/mime.types;

        ## some SSL settings here...

        location / {
            proxy_pass "http://ip2";
        }
}


server {
        listen 5300 ssl;
        server_name  _;
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        include /etc/nginx/mime.types;

        ## some SSL settings here...

		location / {
            if ($http_origin = "https://thisserver:5443") {	
				rewrite ^(.*)$ /5443/$1;
			}
            if ($http_origin = "https://thisserver:6443"){
                rewrite ^(.*)$ /6443/$1;
            }
		}
        
		location /5443/ {
			rewrite ^/5443/(.*)$  $1 break;
			proxy_pass http://ip1:5300/;
			proxy_http_version 1.1;
			proxy_set_header Upgrade $http_upgrade;
			proxy_set_header Connection "upgrade";
		}
	
		location /6443/ {
			rewrite ^/6443/(.*)$  $1 break;
            proxy_pass http://ip2:5300/;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
}

I tried to map the above config to YARP but I don't know how to do the if ($http_origin... part, can anyone help?

currently my settings are as below, I can only do for one IP

"ReverseProxy": {
    "Routes": {
      "r1": {
        "ClusterId": "c1",
        "Match": {
          "Path": "{**any}"
        } 
      },
      "r2": {
        "ClusterId": "c2",
        "Match": {
          "Hosts": [ "*:5300" ],
          "Path": "/{**any}"
        }
      }
    },
    "Clusters": {
      "c1": {
        "Destinations": {
          "d1": {
            "Address": "http://ip1/"
          }
        }
      },
      "c2": {
        "Destinations": {
          "actualUrl": {
            "Address": "http://ip1:5300/"
          }
        }
      }
    }

[tnachy]

I figured that out by using RouteHeader matching