On Tue, Nov 13, 2007 at 12:29:29PM +0100, Pili Muñoz Gargallo wrote: > hello, my name is Pili > > I'm a student and i'm trying to understand how cacti works. I know that it > is the evolution of RDDtool and you need to have it installed to made it > works. I have been reading tutorials, to try understanding but there's a > thing i don't manage to find: > Where i could find information about how configure the agents? i mean, i > think i understand that the NMS needs a suite like cacti, in the agent > must be running Net-SNMP or similar, but i don't know how both interact... > Where i would say the ip of the device i want to monitor? what happens it > the net is already done and there's a switch that supports SNMP? how i could > install Net- SNMP in an agent? > May be these are no the kind of questions you are used to read, but i'm a > student and i can't install things in the lab (i can't enter as root). The > teacher told us to decide for an architecture, but it's very difficult to me > to think in such an abstract way... > > Thank you very much in advance, and i must apologize myself if my doubts > have disturbed someone (or my schematic english) > > best wishes
Tasks: 1: get data from somewhere 2: process and archive it 3: extract data (either as text or as graphic) 4: present the results to the user SNMP can be used for step 1. RRDtool is used for step 2 and 3. Usually an HTTP server is used for step 4. Cacti is one of the available GUIs to do these jobs. Usually: * You do not need to be root to do SNMP queries. * You do not need to be root to use RRDtool. * You do not need to be root to generate HTML content 1: A device, such as a router or a computer, will run an SNMP program. Another computer (it could be the same computer) can query this SNMP server for data. The result is some numeric value. 2: The numeric value is given to RRDtool. It does its job. 4: A user requests a report, for instance by accessing an URL. The webserver will need to fetch the data, which is step 3. I think you should look elsewhere to learn about SNMP, HTTP, and similar questions. HTH -- Alex van den Bogaerdt http://www.vandenbogaerdt.nl/rrdtool/ _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users