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 -g apache www-example

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

[example.com]

prefix = /var/www/$pool            

user = www-example
group = apache

listen = /run/php-fpm-example.com.sock

listen.owner = www-example
listen.group = apache
listen.mode = 0660

pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3

chroot = $prefix

chdir = /

php_admin_value[session.save_path] = /sessions

# rc-update add php-fpm default

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

PHP Error Debugging

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

[...]
catch_workers_output = yes
php_admin_flag[display_errors] = on
php_admin_flag[log_errors] = on
php_admin_value[error_log] = /var/log/fpm-php.example.com.log

# touch /var/log/fpm-php.example.com.log

# chown www-example:apache /var/log/fpm-php.example.com.log