Nagios 3 Ubuntu 9.10 HP Switch SNMP Check Failure

[soapyfish]

Hi,

I am setting up Nagios for the first time, I want it to monitor all my servers and infrastructure and internet connection. So far I have it Monitoring them all in basic ways (ping and public services)

I am trying to get the check_snmp to work for all the managed HP switches, I have looked at the switches config and SNMP is enabled and the "Read Community" ID is "public"

when I have the following lines uncommented in the config and run the preflight check I get the error listed at the bottom of the post.

it seems to be telling me that the I have not defined check_snmp but it cannot see where it wants it to be ?

#
# Monitor uptime via SNMP
#
define service{
use generic-service ; Inherit values from a template
host_name R9-1800-24G
service_description Uptime
check_command check_snmp! -C public -o sysUpTime.0
}





Reading configuration data...

Running pre-flight check on configuration data...

Checking services...
Error: Service check command 'check_snmp' specified in service 'Uptime' for host 'R9-1800-24G' not defined anywhere!

[ChrisH]

You have definitely installed the plugins?

[soapyfish]

How can I "know" I located check_snmp in the following places

/usr/lib/nagios/plugins/check_snmp.cfg
/etc/nagios-plugins/config/snmp.cfg

there is however NO reference to snmp inside the command.cfg but there are these lines

################################################## ##############################
# HOST CHECK COMMANDS
################################################## ##############################

# On Debian, check-host-alive is being defined from within the
# nagios-plugins-basic package

[pete]

In /usr/local/nagios/etc/objects/commands.cfg (alter path depending on where you have nagios installed) you should have an entry line similar to:

# 'check_snmp' command definition
define command{
        command_name    check_snmp
        command_line    $USER1$/check_snmp -H $HOSTADDRESS$ $ARG1$
        }

If you've written your checks in custom-commands.cfg, ensure the file is referenced in nagios.cfg

edit: You should have a check_snmp binary somewhere (no extension). If not, check you've got nagios-plugins installed - search apt for "nagios".

[powdarrmonkey]

In /usr/local/nagios/etc/objects/commands.cfg (alter path depending on where you have nagios installed)

In the Ubuntu package, it's /etc/nagios-plugins/config/snmp*.cfg. If you don't see that directory, you haven't installed the nagios-plugins package.

[soapyfish]

Thanks pete, that worked a treat I think I was getting caught out by ubuntu's pre-packed package thanks Again, its on to monitoring the Windows Services next.

[soapyfish]

I have another question,

Now that I have the snmp monitoring of my layer 2 and 3 switches I am getting data on CPU usage,power,fan, etc. My question is when the reported data states things like,

CPU OK - 7
FAN OK - 4
FREE_MEM OK - 4

What does the number actually mean, whats the scale ? is 1 good and 10 bad or vice versa or what ? I see that by editing the service definitions I can change the size of the numbers but I do not fully understand what it means really. Does anyone have any info on this stuff or is it as simple as "OK-4" mean its all ok !

Thanks