Nginx tip & tricks

Varnish Cache server non supporta SSL perché lo sviluppatore non ha voglia di includerlo (fonte non ha voglia).

Per ovviare al problema è necessario installare nginx , un web-server/reverse-proxy in grado di catturare la chiamata https e redirigerla a Varnish.

Procedura per installazione

Sulla macchina che ha già VARNISH, installare nginx

sudo apt-get install nginx

L'installazione andrà a buon fine ma verrà mostrato un errore, nginx non riesce a partire perché Varnish è già attivo sulla porta 80. È necessario configurarlo in modo che accolga solo le richieste https.

Per prima cosa dobbiamo generare un certificato autofirmato

sudo mkdir /etc/nginx/ssl
sudo openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/nginx/ssl/nginx.key -out /etc/nginx/ssl/nginx.crt

Alla domanda sul common name è necessario scrivere il nome della macchina sul dominio (lo stesso di a /etc/hostname).

Ora apriamo la configurazione di nginx e lo istruiamo per rispondere alle richieste https

sudo vi /etc/nginx/sites-enabled/default

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# http://wiki.nginx.org/Pitfalls
# http://wiki.nginx.org/QuickStart
# http://wiki.nginx.org/Configuration
#
# Generally, you will want to move this file somewhere, and start with a clean
# file but keep this around for reference. Or just disable in sites-enabled.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {
	# listen 80 default_server;
	# listen [::]:80 default_server;

	# SSL configuration
	#
	listen 443 ssl default_server;
	listen [::]:443 ssl default_server;
	#
	# Self signed certs generated by the ssl-cert package
	# Don't use them in a production server!
	#
	# include snippets/snakeoil.conf;

	#root /var/www/html;

	# Add index.php to the list if you are using PHP
	index index.html index.htm index.nginx-debian.html;

	server_name BRUNOPROXY;
	ssl_certificate /etc/nginx/ssl/brunoproxy.crt;
	ssl_certificate_key /etc/nginx/ssl/brunoproxy.key;

	location / {
		# First attempt to serve request as file, then
		# as directory, then fall back to displaying a 404.
		#try_files $uri $uri/ =404;
		proxy_pass http://127.0.0.1:80;
		proxy_set_header X-Real-IP  $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header X-Forwarded-Proto https;
		proxy_set_header X-Forwarded-Port 443;
		proxy_set_header Host $host;
	}

	# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
	#
	#location ~ \.php$ {
	#	include snippets/fastcgi-php.conf;
	#
	#	# With php5-cgi alone:
	#	fastcgi_pass 127.0.0.1:9000;
	#	# With php5-fpm:
	#	fastcgi_pass unix:/var/run/php5-fpm.sock;
	#}

	# deny access to .htaccess files, if Apache's document root
	# concurs with nginx's one
	#
	#location ~ /\.ht {
	#	deny all;
	#}
}


# Virtual Host configuration for example.com
#
# You can move that to a different file under sites-available/ and symlink that
# to sites-enabled/ to enable it.
#
#server {
#	listen 80;
#	listen [::]:80;
#
#	server_name example.com;
#
#	root /var/www/example.com;
#	index index.html;
#
#	location / {
#		try_files $uri $uri/ =404;
#	}
#}