nginx and php-fpm socket owner

Question

After an update of my system I ran into a bad gateway error of my PHP apps running on Nginx.

1 connect() to unix:/var/run/php-fcgi-vhostname-php-fcgi-

Answer 1

NGINX runs as user nginx and php5-fpm as user www-data. Just add nginx to group www-data and the problem is solved, and nginx can access /var/run/php5-fpm.sock. Works great with Ubuntu 14.04, nginx 1.7.10, PHP 5.5.9-1ubuntu4.6 (fpm-fcgi):

$ sudo usermod -aG www-data nginx