Passive checks with NSCA
Colin A. White
colin at trematon.com
Thu Dec 4 17:54:37 CET 2003
Greetings all,
I was wondering if anyone could give me a quick sanity check before I
dive in and break my Nagios install...
I'm hoping to deploy the nsca addon (and send_nsca) to passively monitor
two debian devices hanging off the end of a DSL line. i.e. the target
hosts have dynamic private IPs and do not have resolvable hostnames. I'm
aiming to log snmp traps only. Am I right to think this is a 'passive
check of a volatile service' in nagios-speak ?
I'm wondering now, how to correctly configure the object files for these
hosts and their passive services. I notice from the docs "that in
order to submit passive service checks to Nagios, a service must have
already been defined in the object configuration file" Is this proposed
service definition sane??
define service{
host_name unknown
service_description TRAP
check_command check-host-alive
is_volatile 1
active_checks_enabled 0
passive_checks_enabled 1
check_period none
max_check_attempts 1
normal_check_interval 1
retry_check_interval 1
notifications_enabled 1
notification_interval 31536000
notification_period 24x7
notification_options w,u,c,r
contact_groups linux-admins
}
I'm also wondering how to handle the hosts.cfg definition which requires
an address param as a mandatory field...?? It's this 'gotcha' that has
me most stumped. Am I able to use an arbitrary or fake IP and simply
use host_name matching to determin whether to accept and log the trap?
Any suggestions, comments, ideas, abuse or reading references are most
welcome by this nagios beginner.
Many Thks
--
Colin A. White SCSA, SCNA
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