I *think* I am getting blank graphs due to an snmp problem

[olivelawn]

I am running with the following: fedora core3, cacti-0.8.6b (w/out patches), mysql-4.1.11, php-5.0.4, rrdtool-1.0.49, httpd-2.0.54, and net-snmp-5.1.2.

I followed Lee Carter's "Comprehensive Linux Install Guide" for installation. The install seemed to go fine and I was able to pull up cacti and am successfully automatically graphing localhost stats (load avg, # of logged in users, memory usage, and # processes). This all happened automatically after the install.

I am running into trouble when I try to get cacti to graph a remote host. I installed net-snmp, net-snmp-devel, net-snmp-libs, and net-snmp-utils on the remote host. I did not configure any files and unlike the install I did on the machine running as the cacti server (where I compiled net-snmp), I was not prompted for a snmp version (1,2 or 3). I just installed the rpm pkgs and started snmpd via /etc/init.d/snmpd.

At this point I try adding a device. I pick my remote host and specify a host template of "ucd/net SNMP host" using SMNP v. 1 and the rest of the default options. I click create and it looks like something is working because I get:

System: Linux magichat 2.6.9-1.667 #1 Tue Nov 2 14:41:31 EST 2004 i586
Uptime: 6616660
Hostname: magichat

At this point, I click on create graphs and check the boxes ucd/net - CPU Usage, ucd/net - Load Average, and ucd/net - Memory Usage and I get a message on the next page claiming my graphs have been created. I go to "graph management" wait for awhile and my graphs appear but they are blank (i.e. not graphing data).

At this point i'm not sure how to troubleshoot further, but I did try to run the poller (see output below). What do you guys think my problem is? Do I need to specify a specific snmp version in snmp.conf on my remote machine? Should I have compiled net-snmp instead of using the rpm? Am I just missing some mib on my remote host? I am a lost cacti newbie. There must be something I am doing fundamentally wrong? Thanks for the help.


[cactiuser@toolshed ~]$ /www/php/bin/php /www/htdocs/cacti/poller.php
OK u:0.01 s:0.03 r:4.00
OK u:0.01 s:0.03 r:4.00
OK u:0.01 s:0.03 r:4.01
OK u:0.01 s:0.04 r:4.02
OK u:0.01 s:0.04 r:4.02
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::ssCpuRawNice.0

OK u:0.01 s:0.04 r:6.07
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::ssCpuRawSystem.0

Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::ssCpuRawUser.0

OK u:0.01 s:0.04 r:7.11
OK u:0.01 s:0.04 r:7.11
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::laLoad.1

Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::laLoad.3

OK u:0.02 s:0.04 r:8.16
OK u:0.02 s:0.04 r:8.17
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::laLoad.2

Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::memBuffer.0

OK u:0.02 s:0.05 r:9.21
OK u:0.02 s:0.05 r:9.22
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::memCached.0

Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: UCD-SNMP-MIB::memAvailReal.0

OK u:0.02 s:0.05 r:10.26
OK u:0.02 s:0.05 r:10.26
04/28/2005 02:19:53 PM - SYSTEM STATS: Time: 10.5609 s, Method: cmd.php, Processes: 1, Threads: N/A, Hosts: 3, Hosts/Process: 3

[TheWitness]

Looks more like the agent that you are polling does not have a certain number of OID's.

TheWitness

[olivelawn]

Is there a recommended snmp install? I thought I would be good with net-snmp.

[TheWitness]

It requires configuration. Others here can help you with that.

TheWitness

[olivelawn]

yup. As it turns out, installing snmp via rpm and starting up snmpd without making any conf changes doesn't cut it. You need to configure /etc/snmp/snmpd.conf. Apparently, by default snmpd won't answer snmp request for certain mibs, even if they are installed.

I used to snmpconf to generate an snmpd.conf file.

Now when I run the poller, it appears to be working:

[cactiuser@toolshed ~]$ /www/php/bin/php /www/htdocs/cacti/poller.php OK u:0.01 s:0.03 r:4.12
OK u:0.01 s:0.03 r:4.13
OK u:0.01 s:0.03 r:4.14
OK u:0.01 s:0.03 r:4.14
OK u:0.01 s:0.03 r:4.15
OK u:0.01 s:0.04 r:6.20
OK u:0.01 s:0.04 r:7.24
OK u:0.01 s:0.05 r:7.25
OK u:0.02 s:0.05 r:8.28
OK u:0.02 s:0.05 r:8.29
OK u:0.02 s:0.05 r:9.33
OK u:0.02 s:0.06 r:9.34
OK u:0.02 s:0.06 r:10.38
OK u:0.02 s:0.06 r:10.39
04/29/2005 11:03:11 AM - SYSTEM STATS: Time: 10.5913 s, Method: cmd.php, Processes: 1, Threads: N/A, Hosts: 3, Hosts/Process: 3
04/29/2005 11:03:12 AM - POLLER: Poller[0] Host[10] WARNING: Recache Event Detected for Host
04/29/2005 11:03:19 AM - RECACHE: Poller[0] STATS: Time: 7.5940 s, Hosts Recached: 1

[TheWitness]

You should udate to Cacti 0.8.6d. "b" has major issues.

TheWitness