- Plesk for Linux
There is no option to install PHP-FPM support in Tools&Settings > Updates & Upgrades, when Plesk is installed on CentOS 7.
It is possible to install PHP-FPM handler in Tool&Settings > Updates and Upgrades > Nginx webserver and reverse proxy server > PHP-FPM from OS Vendor when Plesk was used with CentOS 6.
PHP-FPM support is an additional component for CentOS 6 because it is using PHP 5.3 that does not have FPM support by default. Since PHP 5.4 has it, there is no need to install its support additionally as it is already there.
Installed PHP handlers (CGI, FastCGI and FPM) can be managed in Plesk > Tools&Settings > PHP settings.