The 'spawner' application for Zerg demo
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The spawn pool for Zerg demo

This application is an integral part of Zerg demo. It gets initial connection from nginx, spawns a new 'zergling' instance (see, and instructs nginx to proxy the client connection to the newly spawned instance.

How to setup nginx

nginx configuration file must have a block similar to this:

server {
	listen 80;

	# Suppress spawning a second instance just to return 404
	location /favicon.ico {
		return 404;

	# A catapult location to bypass X-Accel-Redirect limitation
	location ~* ^/internal_redirect/(.*?)/(.*?)/(.*) {
		set $redirect_host $1;
		set $redirect_port $2;
		set $redirect_uri $3;
		set $redirect_to http://$redirect_host:$redirect_port/$redirect_uri;
		proxy_pass $redirect_to;

	location / {
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header Host $http_host;
		# Put location of your 'spawningpool' application here
		proxy_pass http://localhost:9001;

How to run the application

The application recorgizes the following command-line flags:

  • -gator the IP address (and port) of the Dom0 running gatord. Defaults to
  • "".