In this setup there is a central rrd server that we're using [http://oss.oetiker.ch/rrdtool/ rrdtool] to collect data collects data from several openvz hardware nodesto a central [http://oss.oetiker.ch/rrdtool/doc/rrdtool.en.html#IRRD_Server rrd server].

Add service in 'rrdsrv' to /etc/services