file { '/etc/init/kafka.conf':
        ensure => 'present',
        source => 'puppet:///modules/kafka/upstart',
        mode   => '0444',
     }
...
     service { 'kafka':
        ensure    => 'running',
        enable    => true,
        require   => [
            User['kafka'],
            Service['zookeeper-server'],
        ],
        subscribe => [
            File['/etc/init/kafka.conf'],
            File['/etc/kafka/server.properties'],
        ],
}