I was using open_basedir in each Apache virtual host with mod-php5. 
php_admin_value open_basedir "/var/www/abc/public_html"
Now I have disabled mod_php5 and configured fastcgi and php5-fpm and no longer able to use open_basedir in virtual hosts. I can still use in /etc/php5/fpm/php.ini but I have several virtual hosts and each with different path. 
What is the way to add open_basedir in virtual hosts while using php5-fpm.