nginx websocket resident memory

Dockerfile

FROM nginx:latest

RUN apt-get update
RUN apt-get -y install procps htop

COPY nginx.conf /etc/nginx/nginx.conf

nginx.conf

worker_processes 1;

error_log /dev/stdout info;

worker_rlimit_nofile 500000;

events {
    worker_connections 500000;
}

http {
    upstream app {
      server 172.17.0.1:5000;
    }

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

    server {
      listen   8080;

      server_name _;

      location / {
        access_log off;
        proxy_pass              http://app;
        proxy_read_timeout      60m;
        proxy_redirect          off;
        proxy_buffering         off;
        proxy_http_version      1.1;
        proxy_set_header        Host                    $host;
        proxy_set_header        X-Real-IP               $remote_addr;
        proxy_set_header        X-Forwarded-For         $proxy_add_x_forwarded_for;
        proxy_set_header        Upgrade                 $http_upgrade;
        proxy_set_header        Connection              $connection_upgrade;
      }
    }
}