Alarming on coredumps on Linux?

[Manish Sapariya]

Try this out

echo "kernel.core_pattern = /tmp/core.%e.%p.%t" >> /etc/sysctl.conf

It most probably needs reboot to take effect. After the
reboot, all core files will be created in /tmp with exe name,
pid and the time stamp appended.

I watch the any new core file by using the find with mtime option.

I can share the script if you would like to see it.

Regards,
Manish

Thomas Guyot-Sionnest wrote:
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> On 07/10/08 01:26 PM, Tim Pushor wrote:
>> Hello everyone,
>>
>> While not specifically a nagios issue, I am setting up a nagios 
>> installation to monitor a server that is used to run an interactive 
>> application by several users at once (> 50). The problem is, 
>> occasionally the application dumps core, and the users don't always 
>> notify us when this happens. We'd like to trigger a passive alarm to 
>> nagios on our application dumping core.
>>
>> On other OS's (specifically FreeBSD IIRC) the kernel logs coredumps and 
>> end up in the system log so watching the logfiles with swatch or 
>> something similar would do the trick.
>>
>> On my Linux system (CentOS 5.2) it appears that coredumps don't log. 
>> Does anyone have any ideas how I can trigger an event on coredump on Linux?
> 
> This is not really a nagios issue... AFAIK segfaults are logged in
> Linux; have you looked at the kernel messages (dmesg)?
> 
> If it shows in dmesg output but not on your logs, make sure syslog is
> configured properly to retrieve those messages. You could also log
> kern.* to a specific files to be sure.
> 
> I think log levels can also be tuned with /proc/sys/kernel/printk; see
> "man 5 proc".
> 
> - --
> Thomas
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