Frequently Asked Questions
2007-06-08
http://unnoc.org

This is an ongoing list of frequently asked questions

1. Disks of greater capacity than 2.2TB.

Q: I've added my disks to snmpd.conf, however I have a disk that is
   larger than 2TB and Unnoc only shows that the disk is 2.2TB, how 
   do I fix this?

A: This is due to a limitation in Net-SNMP.  The best way to fix this is 
   to specify the disks manually with the "disktype = hr" option.  For 
   instance, if you have this in your snmpd.conf file:

	disk  / 10%
	disk  /srv 5%

   Then use the following host definition:

	host {
		hostname = server1
		community = public
		type = server
		disktype = hr

		disk {
			partition = /proc/bus/usb
			ignore = 1
		}       

		disk {
			partition = /
			high_usage = 90%
			warn_usage = 80%
		}       

		disk {
			partition = /srv
			high_usage = 95%
			warn_usage = 90%
		}
	
	}

   Notice the "disktype = hr", that tells Unnoc to use the
   HOST-RESOURCES-MIB, instad of the UCD-SNMP-MIB.
  
   Also, notice the "ignore = 1" on /proc/bus/usb.  If using
   HOST-RESOURCES-MIB, then it will pull all partitions.  Simply 
   tell unnoc to ignore the ones you dont need.


2. Rename a host

Q. I've changed the name of my server, all of my graphs have
   dissappeared though.  How do I rename a server?

A. You need to do two things.  The first thing you need to do is update
   the unnoc.conf file with the new server name.  The next thing you
   need to do is rename the rrd/hostname directory.

   For example, if you changed the hostname of a particular server from
   server1 to server2, then you need to update the unnoc.conf entry:

   	host {
		#hostname = server1
		hostname = server2
		community = public
		type = server
		...
	}

   And then you need to rename the rrd/server1 directory to rrd/server2.
   If you've already done the first step and see blank graphs for
   the new server, then you need to remove the new directory first (or
   rename it, anyway):

	(if rrd/server2 already exists, rename it to server2.blank)

   	# mv rrd/server2 rrd/server2.blank

	(then you need to rename the old directory to the new directory)

	# mv rrd/server1 rrd/server2

   You should now be done.






vim:tw=72:wm=1