snmp on fedora

[Dan Track]

Hi,

I  hope someone can help me please.

I trying to get mrtg to monitor cpu and memory on a server, but its
not working. In my mrtg.cfg file I have the following:

Target[server.cpu]:.1.3.6.1.4.1.2021.11.9.0&.1.3.6.1.4.1.2021.11.10.0:string@server
Title[server.cpu]: Server CPU Load
Directory[server.cpu]: ruby
PageTop[server.cpu]: <H1>CPU Load - System, User and Nice Processes</H1>
MaxBytes[server.cpu]: 100
ShortLegend[server.cpu]: %
YLegend[server.cpu]: CPU Utilization
Legend1[server.cpu]: Current CPU percentage load
LegendI[server.cpu]: Used
LegendO[server.cpu]:
Options[server.cpu]: growright,nopercent
Unscaled[server.cpu]: ymwd

The problem is that the graphs aren't updating, does anyone know why?

Thanks
Dan

[»Steven Ringwald«]

Dan Track wrote:
> Hi,
>
> I  hope someone can help me please.
>
> I trying to get mrtg to monitor cpu and memory on a server, but its
> not working. In my mrtg.cfg file I have the following:
>
> Target[server.cpu]:.1.3.6.1.4.1.2021.11.9.0&.1.3.6.1.4.1.2021.11.10.0:string@server

Do you have net-snmp-utils installed?

If you do, you might want to try using those OIDs on the server, and 
seeing if any authentication errors/etc are reported:

snmpwalk -v1 -c string server.1.3.6.1.4.1.2021.11.9.0   
snmpwalk -v1 -c string server .1.3.6.1.4.1.2021.11.10.0

would the command for the example above, assuming Version 1 SNMP.

Steve

[Dan Track]

On 1/30/06, Steven Ringwald  wrote:
> Dan Track wrote:
> > Hi,
> >
> > I  hope someone can help me please.
> >
> > I trying to get mrtg to monitor cpu and memory on a server, but its
> > not working. In my mrtg.cfg file I have the following:
> >
> > Target[server.cpu]:.1.3.6.1.4.1.2021.11.9.0&.1.3.6.1.4.1.2021.11.10.0:string@server
>
> Do you have net-snmp-utils installed?
>
> If you do, you might want to try using those OIDs on the server, and
> seeing if any authentication errors/etc are reported:
>
> snmpwalk -v1 -c string server.1.3.6.1.4.1.2021.11.9.0
> snmpwalk -v1 -c string server .1.3.6.1.4.1.2021.11.10.0
>
> would the command for the example above, assuming Version 1 SNMP.

Hi

Thanks for the advice. I have the following snmp rpm's installed from hp:
net-snmp-cmaX
net-snmp-perl
net-snmp-cmaX-libs
net-snmp-cmaX-utils

I tried your command but I got the following:

snmpwalk: Unknown host

I tried writing the hostname and even the ip, but it keeps saying the above.

I'm not experienced with mrtg that much, so any help will be appreciated.

Thanks
Dan

[»Steven Ringwald«]

Dan Track wrote:
> > snmpwalk -v1 -c string server .1.3.6.1.4.1.2021.11.9.0
> > snmpwalk -v1 -c string server .1.3.6.1.4.1.2021.11.10.0
> > Hi
> >
> > Thanks for the advice. I have the following snmp rpm's installed from hp:
> > net-snmp-cmaX
> > net-snmp-perl
> > net-snmp-cmaX-libs
> > net-snmp-cmaX-utils
> >
> > I tried your command but I got the following:
> >
> > snmpwalk: Unknown host
> >
> > I tried writing the hostname and even the ip, but it keeps saying the above.
> >
> > I'm not experienced with mrtg that much, so any help will be appreciated.

Ok. Question for you? Are you using the firewalling of any kind on the 
box, and if so, do you have the SNMP port open?

Steve

[Dan Track]

> Ok. Question for you? Are you using the firewalling of any kind on the
> box, and if so, do you have the SNMP port open?

Nope no firewalling. Yes I allready have the SNMP ports open.

Thanks
Dan

[Dan Track]

Ahhh wait, forget my last post. I just figured it out, I hadn't left a
space between the id's and the server name.

Here's the output:

snmpwalk -v1 -c string server .1.3.6.1.4.1.2021.11.9.0
UCD-SNMP-MIB::ssCpuUser.0 = INTEGER: 1

snmpwalk -v1 -c string server .1.3.6.1.4.1.2021.11.10.0
UCD-SNMP-MIB::ssCpuSystem.0 = INTEGER: 10

What's the next step?

Thanks in advance
Dan

[Dan Track]

Hi

Thanks for your help. Just for the record, and to help others, I fixed
the problem.

In this case at least I encountered the following error messages:

env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg Unknown SNMP var ssCpuRawUser.0
  at /usr/bin/mrtg line 1678
Unknown SNMP var ssCpuRawUser.0
  at /usr/bin/mrtg line 1678
WARNING: Expected a number but got '102 days, 0:09:38'
WARNING: Expected a number but got 'server'
Unknown SNMP var ssCpuRawSystem.0
  at /usr/bin/mrtg line 1678
Unknown SNMP var ssCpuRawSystem.0
  at /usr/bin/mrtg line 1678
WARNING: Expected a number but got '102 days, 0:09:38'
WARNING: Expected a number but got 'server'
Unknown SNMP var ssCpuRawNice.0
  at /usr/bin/mrtg line 1678
Unknown SNMP var ssCpuRawNice.0
  at /usr/bin/mrtg line 1678
WARNING: Expected a number but got '102 days, 0:09:38'
WARNING: Expected a number but got 'server'
ERROR: Target[server.cpu][_IN_] ' $$target[11]{$mode}  +
$$target[12]{$mode}  +  $$target[13]{$mode} ' (warn): Use of
uninitialized value in addition (+) at (eval 59) line 1.
ERROR: Target[server.cpu][_OUT_] ' $$target[11]{$mode}  +
$$target[12]{$mode}  +  $$target[13]{$mode} ' (warn): Use of
uninitialized value in addition (+) at (eval 60) line 1.
WARNING: Skipping Update of server.cpu, inlast is not defined
WARNING: Skipping Update of server.cpu, outlast is not defined

To fix this I added the lines:

LoadMIBs: /usr/share/snmp/mibs/UCD-SNMP-MIB.txt
LoadMIBs: /usr/share/snmp/mibs/HOST-RESOURCES-MIB.txt
LoadMIBs: /usr/share/snmp/mibs/HOST-RESOURCES-TYPES.txt

Here's my config:

Target[serverload]:ssCpuRawUser.0&ssCpuRawSystem.0:string@server
Directory[serverload]: server
MaxBytes[serverload]: 100
Title[serverload]: CPU LOAD on server
PageTop[serverload]: <H1>CPU (user and system) Load %</H1>
Unscaled[serverload]: ymwd
ShortLegend[serverload]: %
YLegend[serverload]: CPU Utilization
Legend1[serverload]: User CPU in % (Load)
Legend2[serverload]: System CPU in % (Load)
Legend3[serverload]:
Legend4[serverload]:
LegendI[serverload]: User
LegendO[serverload]: System
Options[serverload]: growright,nopercent

Hope this helps someone.

Dan