host.example.com.pp (Источник)

node "host.example.com" inherits hosts{

class   { "mail":
        dbtype   => "mysql",
        dbserver => "127.0.0.1",
        dbpass   => "password",
        dbname   => "postfix",
        dbuser   => "postfix",
        dbport   => "3306"
        }
}