Configuring nginx as a proxy / load balancer (HTTP and Websocket connections)

nginx-websocket-lb.conf

# https://deepstreamhub.com/blog/load-balancing-websocket-connections
# https://deepstreamhub.com/open-source/integrations/other-nginx

# Websocket
# proxy_http_version 1.1;
# proxy_set_header Upgrade $http_upgrade;
# proxy_set_header Connection "upgrade";
# proxy_set_header Connection $http_connection;


worker_processes  1;

events {
    worker_connections  1024;
}

http {
    map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
    }

    upstream websocket {
      server localhost:6020;
    }
    upstream httpendpoint {
      server localhost:8080;
    }

    server {
       listen 9090;

       # Deepstream websocket redirect
       location /deepstream {
            proxy_pass http://websocket;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Connection $http_connection;
            rewrite ^/deepstream(.*) $1 break;
       }

      # Deepstream http endpoint
      location /http {
           proxy_pass http://httpendpoint;
           proxy_http_version 1.1;
           rewrite ^/http(.*) $1 break;
      }
   }
}