checking for reboots of a host

[Andreas Ericsson]

Frank Pikelner wrote:
> Yes, I'm currently using SNMP to obtain uptime of hosts and network devices.
> Is there a way of doing comparison from the return value in the standard
> script? 
> 
> I would like to check if value X returned is less than < 86400 (seconds for
> 24 hours), if less than then return uptime with a WARNING, if greater than
> 
>>= 86400 simply return uptime (okay)
> 

Simplest possible;
-----------
#!/bin/bash

uptime=`snmpwalk -m: -v 1 -c <community> -Ovq $1 <uptime-oid>`
ret=$?
if [ $ret -ne 0 ]; then
  echo "SNMP ERROR: snmpget returned $ret"
  exit 2
fi

if [ $uptime -gt 86400 ]; then
   echo "OK: $1 has made it past its first 24 hours"
   exit 0
fi

echo "WARNING: $1 has uptime less than 24 hours ($uptime seconds)"
exit 1
-------------

Cut 'n paste.

The above script runs faster than anything but a pure C plugin, since it 
forks only once and parses no mib files.

> 
> Frank
> 
> <steve wrote>
> 
> couldn't you use SNMP to pull the uptime from the host? (Assuming the hosts
> have some SNMP daemon running) Even a custom script that stores the returned
> info, so on next check, it can compare it... if current uptime for host "X"
> is less that last uptime for host "X", then alert?
> 
> Steve
> 
-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Lead Developer


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