Monitoring hosts and DHCP

[Matt Lozier]

Hello,

 

I'm monitoring about 30 machines using Nagios with SNMP checks.  I also have
a DHCP server casting each machine on the network their IP address on
start-up.  Some machines stay on the majority of the time, others for only
4-8 hours a day.  The machines generally maintain their same IP address over
time as DHCP is designed to try and give a machine back it's same IP, so
long as it's available.  However, there have been times when a machine has
changed its IP addresses as a result of using DHCP on this LAN.

 

Question:

 

When I write the host macro for a given machine, e.g:

 

define host{
        host_name      random_machine 
        address        192.168.1.100
        check_command  check_ping
        }
 
Is there a way to have nagios use a variable to read its address rather than
keep the address static?  This would allow me to have a script scan the
network, and assign IPs to a given variable which is then read by the host's
*.cfg file in the /etc/objects directory.
 
Any and all advice is appreciated.
 
Thank you,

 

 

---

Matt Lozier

Network Administrator

972.644.2581, ext. 248

972.661.2701  fax

 

 <http://www.spindletopoil.com/> 

 

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