Merge pull request #3539 from halkyon/hhvm_nginx_docs2

Adding documentation for installing HHVM with nginx on Linux

docs/en/installation/index.md

@@ -28,6 +28,7 @@ To run SilverStripe on Linux/Unix, set up one of the following web servers:
 *  [Install using Apache](webserver) - our preferred platform
 *  [Install using Lighttpd](lighttpd) - fast, but a bit tricker to get going
 *  [Install using Nginx](nginx) - Super fast at serving static files. Great for large traffic sites.
+*  [Install using nginx and HHVM](nginx-hhvm) - nginx and [HHVM](http://hhvm.com/) as a faster alternative to PHP
 
 ### Windows
 

docs/en/installation/nginx-hhvm.md

@@ -0,0 +1,102 @@
+# nginx and HHVM
+
+[HHVM](http://hhvm.com/) is a faster alternative to PHP, in that it runs in a virtual machine
+and uses just-in-time (JIT) compilation to achieve better performance over standard PHP.
+
+Installation on Debian or Ubuntu is relatively straightforward, in that HHVM already provide
+packages available to use:
+
+Debian 7 (wheezy):
+
+	wget -O - http://dl.hhvm.com/conf/hhvm.gpg.key | sudo apt-key add -
+	echo deb http://dl.hhvm.com/debian wheezy main | sudo tee /etc/apt/sources.list.d/hhvm.list
+	sudo apt-get update
+	sudo apt-get install hhvm	
+
+Ubuntu 14.04 (trusty):
+
+	wget -O - http://dl.hhvm.com/conf/hhvm.gpg.key | sudo apt-key add -
+	echo deb http://dl.hhvm.com/ubuntu trusty main | sudo tee /etc/apt/sources.list.d/hhvm.list
+	sudo apt-get update
+	sudo apt-get install hhvm
+
+Please see [Prebuilt Packages for HHVM on HHVM wiki](https://github.com/facebook/hhvm/wiki/Prebuilt%20Packages%20for%20HHVM) for more ways to install.
+
+Assuming you already have nginx installed, you can then run a script to enable support for
+nginx and/or apache2 depending on whether they are installed or not:
+
+	/usr/share/hhvm/install_fastcgi.sh
+
+For nginx, this will place a file at `/etc/nginx/hhvm.conf` which you can use to include in
+your nginx server definitions to provide support for php requests.
+
+In order to get SilverStripe working, you need to create a custom configuration file.
+
+In your `/etc/nginx/silverstripe.conf`, add this configuration:
+
+	fastcgi_buffer_size 32k;
+	fastcgi_busy_buffers_size 64k;
+	fastcgi_buffers 4 32k;
+	
+	location / {
+		try_files $uri /framework/main.php?url=$uri&$query_string;
+	}
+	
+	error_page 404 /assets/error-404.html;
+	error_page 500 /assets/error-500.html;
+	
+	location ^~ /assets/ {
+		sendfile on;
+		try_files $uri =404;
+	}
+	location ~ /(mysite|framework|cms)/.*\.(php|php3|php4|php5|phtml|inc)$ {
+		deny all;
+	}
+	location ~ /\.. {
+		deny all;
+	}
+	location ~ \.ss$ {
+		satisfy any;
+		allow 127.0.0.1;
+		deny all;
+	}
+	location ~ web\.config$ {
+		deny all;
+	}
+	location ~ \.ya?ml$ {
+		deny all;
+	}
+	location ^~ /vendor/ {
+		deny all;
+	}
+	location ~* /silverstripe-cache/ {
+		deny all;
+	}
+	location ~* composer\.(json|lock)$ {
+		deny all;
+	}
+	location ~* /(cms|framework)/silverstripe_version$ {
+		deny all;
+	}
+
+The above script passes all non-static file requests to `/framework/main.php` in the webroot which relies on
+`hhvm.conf` being included prior so that php requests are handled.
+
+Now in your nginx `server` configuration you can then include the `hhvm.conf` and `silverstripe.conf` files
+to complete the configuration required for PHP/HHVM and SilverStripe.
+
+e.g. `/etc/nginx/sites-enabled/mysite`:
+
+	server {
+		listen 80;
+		root /var/www/mysite;
+		server_name www.mysite.com;
+	
+		error_log /var/log/nginx/mysite.error.log;
+		access_log /var/log/nginx/mysite.access.log;
+	
+		include /etc/nginx/hhvm.conf;
+		include /etc/nginx/silverstripe.conf;
+	}
+
+For more information on nginx configuration, please see the [nginx installation](nginx) page.