HHVM serve multiple domain - virtualhost

Question

I'm try to host several domain on the same VPS, using HHVM to serve the pages.
I'm wondering how can I write the VirtualHost in order to point the right folder in my /var/www directory ?
For example xxx.domain.com >> /var/www/domain.com/

Answer 1

Good news. Since the release of HHVM 2.3 (Dec 13, 2013), you can run HHVM in FCGI mode. Use either Nginx or Apache and it works wonderfully.
Reference: http://www.hhvm.com/blog/1817/fastercgi-with-hhvm
With an older version of HHVM you can run multiple server instances on internal ports, i.e. 8001, 8002, etc. Then configure Nginx as a reverse proxy. (Apache can do that too).
upstream node1{
server 127.0.0.1:8001;
}
upstream node2{
server 127.0.0.1:8002;
}
server {
...
server_name server1.com;
location ~ \.php$ {
proxy_pass http://node1;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
proxy_redirect off;
proxy_buffering off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Ssl on; #only for https
}
}
server {
...
server_name server2.com;
location ~ \.php$ {
proxy_pass http://node2;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
proxy_redirect off;
proxy_buffering off;
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 X-Forwarded-Ssl on; #only for https
}
}
Of course this setup takes up a lot of memory. Go with 2.3 if you can upgrade.

Answer 2

Apparently is not yet possible. Accordling to the official github repository where the code is hosted exists an open issue about the same issue you are asking and it's tag for wishlist / feature request.
Probably the best way to solve this is to run a HHVM server for each domain (mean each domain you need a different root folder) and use Apache or Nginx as proxy.

Answer 3

On Nginx, the only way I was able to get this to work was to use / as SourceRoot for HHVM, and to add a / in fastcgi_param SCRIPT_FILENAME /$document_root$fastcgi_script_name; in my /etc/nginx/hhvm.conf file. With that combination, I'm running ~7 sites without a problem so far. I'm running Ubuntu 13.10 64-bit.
In /etc/hhvm/server.hdf, change SourceRoot = /var/www to SourceRoot = /:
Server {
Port = 9000
SourceRoot = /
DefaultDocument = index.php
}
In /etc/nginx/hhvm.conf, add a / in front of $document_root$fastcgi_script_name;:
location ~ \.php$ {
fastcgi_split_path_info ^(.+?\.php)(/.*)$;
fastcgi_keep_conn on;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /$document_root$fastcgi_script_name;
fastcgi_intercept_errors on;
fastcgi_read_timeout 300;
include fastcgi_params;
}
You may also need to change fastcgi_param SCRIPT_FILENAME $fastcgi_script_name; to fastcgi_param SCRIPT_FILENAME /$document_root$fastcgi_script_name;, at least I had to with mine.
There may be security implications by using / as your SourceRoot - I mitigate this as much as I can by firewalling port 9000 so only localhost can reach it. Or you can use a socket instead. Not fool-proof, but from what I've seen so far it's OK.