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Installing nginx on a host machine

# apt-get install nginx

Configure when running on the host

Allow connections to the server on the http port:

# iptables -I INPUT 1 -p tcp --dport 80 -s 157.181.0.0/16 -j ACCEPT

Test if you see the nginc welcome page, then make a backup of /etc/nginx/sites-available/default and edit it:

=============================================================== server { listen compare.vo.elte.hu:80; server_name compare.vo.elte.hu; location /gitlab { proxy_pass http://172.18.0.3; } }

Enable websockets etc for notebooks

location ~* /notebook/[^/]+/[^/]+/(api/kernels/[^/]+/(channels|iopub|shell|stdin)|terminals/websocket)/? {
  proxy_pass            http://$PROXYIP:8000;
  proxy_http_version    1.1;
  proxy_set_header      Host \$http_host;
  proxy_set_header      Upgrade \$http_upgrade;
  proxy_set_header      Connection \"upgrade\";
  proxy_read_timeout    86400;
}

Customize error messages to include proxy server name (for debugging)

In any server section, add:

error_page 502 /502.html;

location = /502.html {
  root /var/www/nginx/;
}

Put error page 502.html under /var/www/nginx/ with content:

<html>
<head><title>502 Bad Gateway</title></head>
<body bgcolor="white">
<center><h1>502 Bad Gateway: pollux-ubuntu</h1></center>
<hr><center>nginx/1.10.0 (Ubuntu)</center>
</body>
</html>
<!-- a padding to disable MSIE and Chrome friendly error page -->
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Installing nginx in a docker container

Create a directory for the customized nginx.conf file and copy an original nginx.conf to here from somewhere.

# mkdir -p /data/data1/compare/srv/nginx/etc/

# docker pull nginx
#  docker run --name compare-nginx --net testnet -v /data/data1/compare/srv/nginx/etc/nginx.conf:/etc/nginx/nginx.conf:ro -v /data/data1/compare/srv/nginx/etc/sites-enabled/:/etc/nginx/sites-enabled/ -d nginx

A typical nginx.conf should look like this

=============================================================== user www-data; worker_processes 4; pid /run/nginx.pid;

events {
	worker_connections 768;
	# multi_accept on;
}

http {

	# ... lot of stuff ...

	server {
	  listen compare.vo.elte.hu:80;
	  server_name compare.vo.elte.hu;
	  location /gitlab {
		proxy_pass http://172.18.0.3;
	  }
	}
}

===============================================================

Test with curl

curl http://172.18.0.5