PHP-FPM

Installation

File: /etc/portage/package.use

app-eselect/eselect-php fpm
dev-lang/php fpm

File: /etc/portage/make.conf

PHP_INI_VERSION="production"
APACHE2_MODULES="[...] proxy proxy_fcgi"

Configuration

# useradd --system --shell /bin/false --no-create-home --home /var/www/example.com example

File: /etc/php/fpm-php7.0/fpm.d/example.com.conf

[example.com]

prefix = /var/www/$pool            

user = example
group = example

File: /etc/php/fpm-php7.0/fpm.d/www.conf

user = apache
group = apache
listen = /var/run/php-fpm-www.sock
listen.owner = apache
listen.group = apache
php_admin_value[open_basedir] = /var/www/subdomain.example.com:/usr/bin:/usr/share/php

# rc-update add php-fpm default

# /etc/init.d/php-fpm start