This is my first post on my very first blog.
So I ask for your understanding.
Also - I'm not a xNIX systems expert (yet) so posts regarding Linux may contain some errors.
Again - be forgiving :-)
(and give feedback, always give feedback!!)
OK. To the point.
I'm using SNMP to get performance data of a Linux (Debian Etch) machine. I need to get CPU usage of every core separately. Unfortunately the machine does not give out that information via SNMP.
I fixed it by upgrading SNMP agent to latest (almost) stable version.
Here are the steps I needed to take.
Check the current snmpd version installed on said box:
- locally:
find / -name snmpd/usr/sbin/snmpd -v
- remotely:
It turned out that machine uses snmpd version 5.2.3 which is the latest version for Debian Etch.snmpwalk -v 1 -c community_string X.X.X.X versiontag
So the only way to use newer SNMP agent on this old Debian is to compile it from source.
Download the latest stable source package of Net-Snmp:
wget http://sourceforge.net/projects/net-snmp/files/net-snmp/5.4.2.1/net-snmp-5.4.2.1.tar.gz/download
Unpack it, configure, compile and install
OOOPS! Error:tar -xf net-snmp-5.4.2.1.tar.gzcd net-snmp-5.4.2.1./configuremakemake install
It turned out that the poor Etch did not have libperl-dev (PERL development library)/usr/bin/ld: cannot find -lperl
So:
apt-get install libperl-devand than compile and install again.
After the installation disable / remove the old snmpd package:
or/etc/init.d/snmpd stop
aptitude remove snmpd
Run the newly installed agent with old configuration file:
/usr/local/sbin/snmpd -c /etc/snmp/snmpd.conf &
Check the running processes:
ps -ef | grep -i snmp.(the dot at the end is a REGEXP symbol for "any single character" so that grep will filter for "snmp" and "snmpd")
And check the SNMP agent version again.
Success!
Afterword:
I use OpsView for monitoring. It a s Nagios-based open-source application. I will talk about it near future.
