Checking of multicasts
Mascardo, Erwin
Erwin.Mascardo at intelsat.com
Thu Aug 4 14:25:26 CEST 2005
>-----Original Message-----
>From: nagios-users-admin at lists.sourceforge.net
>[mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of
>Joop Jansen
>Sent: Tuesday, 02 August, 2005 11:29
>To: nagios-users at lists.sourceforge.net
>Subject: [Nagios-users] Checking of multicasts
>
>
>Following setup:
>
>We are using a network in a multicast setup.
>
>This means that there are several remote sites under a multicast.
>(remotes with inbound connection, and one outbound towards all
>the remotes).
>
>I also would like to monitor the multicast itself, so to receive a
>notification
>when the whole multicast goes down.
>
>I was thinking to use check_icmp to ping all the remotes of
>that multicast.
>However check_icmp has three ways to operate (check_host/check_icmp and
>check_all).
>
>Check_host would be perfect, only I need to have the opposite.
>So It should
>send
>one icmp packet to all the remotes, and only return to the
>state critical
>when all the remotes are not reachable.
>
>The check_host just returnes critical when already one site is down.
>
>Does someone has done something similar?
>
>Or is using a different approach?
>
>Thanks in advance
>
>Joop
To take some good advice in a far different context, wrap that rascal.
Put check_host/check_icmp in a Perl wrapper (it would take some hairy
shell code to interpret the output the way you want to) which breaks
apart the output and looks for "lost 100%" for every host. If that is
true, then return CRITICAL...otherwise, return OK.
--Erwin
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