RFC 1 Check_Open_Connections 2 SLA attribute for templates.

[Karl DeBisschop]

On Tue, 2003-07-22 at 22:40, Stanley Hopcroft wrote:
> Dear Ladies and Gentlemen,
> 
> I am writing to request your comments on 
> 
> 1 A plugin to check that the number of open TCP connections is less than 
> a threshold.
> 
> This plugin is inspired by the Orcallator monitor of 'Number of Open TCP 
> connections' and made essential by my employers famous name application 
> server (name withheld since this is a family program) dieing early one 
> morning when the hosts limit was breached.
> 
> It is
> 
> . implemented in Perl
> 
> . not portable (basically its a Netstat filter that needs to know the 
> Netstat format of the host)
> 
> . easy to hack because it is so-so thin
> 
> Here is the sample output (Sol version).
> 
> [asterix]/usr/home/nagios$ perl/check_open_connections
> Ok. Number of open TCP connections (362) less than threshold. Top 
> connectors: 10.0.100.201  108, 10.0.100.65  49, 192.168.101.210  27, 
> 192.168.102.210  24, 192.168.103.210  22.

If you have SNMP on the host in question, you can just use check_snmp. I
think most implementations provide this in their MIB. Certainly net-snmp
does.

This solution has the advantage of being portable.

--
Karl



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