/etc/logrotate.d/apache2

/var/log/apache2/hosts.log /var/log/apache2/hosts_error.log {
        monthly
        missingok
        rotate 12
        compress
        delaycompress
        notifempty
        create 640 root adm
        sharedscripts
        postrotate
                if [ -f "`. /etc/apache2/envvars ; echo ${APACHE_PID_FILE:-/var/run/apache2/apache2.pid}`" ]; then
                        /etc/init.d/apache2 restart
                fi
        endscript
}