cpu monitor with snmp

José de Figueiredo

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Apr 16, 2008, 4:02:21 AM4/16/08

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Greetings to all !

Anybody can help me about how to monitor CPU LOAD with SNMP ?
I'm trying use this OID hrProcessorLoad (.1.3.6.1.2.1.25.3.3.1.2) at
host-resoure-mib. i'm using NET-SNMP over Linux.

jose@armadeira:~$ snmpwalk -v2c -c public aracne 1.3.6.1.2.1.25.3.3.1.2
HOST-RESOURCES-MIB::hrProcessorLoad = No Such Instance currently exists
at this OID

or
jose@armadeira:~$ snmpwalk -v2c -c public aracne hrProcessorLoad
HOST-RESOURCES-MIB::hrProcessorLoad = No Such Instance currently exists
at this OID

thanks in advance

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Dave Shield

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Apr 16, 2008, 4:53:33 AM4/16/08

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On 15/04/2008, Jos=E9 de Figueiredo <jo...@elomed.com.br> wrote:
> Anybody can help me about how to monitor CPU LOAD with SNMP ?

Which version of the Net-SNMP agent are you using?

> I'm trying use this OID hrProcessorLoad (.1.3.6.1.2.1.25.3.3.1.2) at
> host-resoure-mib. i'm using NET-SNMP over Linux.

You might like to try looking at UCD-SNMP-MIB::systemStats

> jose@armadeira:~$ snmpwalk -v2c -c public aracne 1.3.6.1.2.1.25.3.3.1.2

> HOST-RESOURCES-MIB::hrProcessorLoad =3D No Such Instance

Depending on the version of the agent you are using, you may
need to explicitly configure in support for the Host Resources MIB.

Can you see anything in hrSystem?

Dave

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Dave Shield

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Apr 16, 2008, 9:39:38 AM4/16/08

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> about systemStats:
> $ snmpwalk -v2c -c public roteador systemStats
> the agent response is: ...No more variables left in this MIB View..

Ah. That looks like Access Control.
I suspect that you're using vendor-supplied default access control
settings, which typically only allow access to the system group.

See the FAQ entry about access control for more details.

> about hrSystem:
> HOST-RESOURCES-MIB::hrSystemUptime.0 = Timeticks: (415197846) ....
> HOST-RESOURCES-MIB::hrSystemDate.0 = STRING: 2008-4-16,9:42:12.0,-3:0
> HOST-RESOURCES-MIB::hrSystemInitialLoadDevice.0 = INTEGER: 1536
> HOST-RESOURCES-MIB::hrSystemInitialLoadParameters.0 = STRING: ....
> HOST-RESOURCES-MIB::hrSystemNumUsers.0 = Gauge32: 0
> HOST-RESOURCES-MIB::hrSystemProcesses.0 = Gauge32: 40
> HOST-RESOURCES-MIB::hrSystemMaxProcesses.0 = INTEGER: 0

That shows that your agent *does* include the HostResources MIB.

> my net-snmp version is 5.2.3

I haven't checked, but I'm pretty sure that the 5.2.x agent doesn't
support hrProcessorLoad. Fix your access control views, and
use the systemStats group.

Dave

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José de Figueiredo

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Apr 17, 2008, 9:59:53 AM4/17/08

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Em Wed, 16 Apr 2008 14:38:27 +0100, Dave Shield escreveu:

thanks Mr. Dave
on follow your instructions I see on my snmpd.conf, on control access
section: my public access have permission to READ only sysView then i use
my private access to see systemStats mib.