This module requires the RRDs module to be installed. It is 
available in the rrdtool distribution:
 http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/pub/rrdtool.tar.gz
Do you want me to install it for you right now ([y]/n)?Can't open INSTALLDIRS=site: No such file or directory at Makefile.PL line 19.
Downloading ... done.