Symlinks breaks FPM on Debian Stretch

short description

Overriding the document root with the {DOCROOT} placeholder in apache directives breaks php-fpm. So:

DocumentRoot {DOCROOT}/folder

in apache directive will results in DocumentRoot /var/www/example.com/web/folder, and php fpm stops work, and will return a file php as plain text to the browser.

But, if switch to FastCGI, mod_php, etc it works.

The problem is the symlink, because if you put in the apache directives box this, instead using the placeholder:

DocumentRoot /var/www/clients/clientX/webY/web/folder

It works also with FPM.

correct behaviour

With mod_proxy_fcgi seems not support the symlinks, so the {DOCROOT} should be a real path, and FPM will work.

environment

• Server OS: debian
• Server OS version: stretch
• ISPConfig version: 3.1.7

Server version: Apache/2.4.25 (Debian)
Server built:   2017-09-19T18:58:57

PHP 7.0.19-1 (cli) (built: May 11 2017 14:04:47) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.0.19-1, Copyright (c) 1999-2017, by Zend Technologies

proposed fix

The {DOCROOT} placeholder should put the real path instead the symlink to the web folder.