6. Drupal 8: System requirements
PHP 5.5.9 or higher
PostgreSQL 9.1.2 or higher with PDO,
MySQL 5.5.3/MariaDB 5.5.20/
Percona Server 5.5.8 or higher with PDO and
an InnoDB-compatible primary storage engine,
SQLite 3.6.8 or high
Drupal will work on Apache 2.x hosted
on UNIX/Linux, OS X, or Windows.
CentOSは7から対応との事