[CentOS] CentOS on IBM Bladecenter HS21

On Thu, Jul 16, 2009 at 11:31 AM, Andrei F<frunzales at gmail.com> wrote:
> Hello,
>
> I have CentOS 5.2 installed on two of the afore-mentioned blades.
> I've noticed that the OS started to crash lately (kernel panic) and I've
> been assigned the task to troubleshoot this issue.
>
> I would like to know what is the best way of recovering the kernel
> dump after the OS crashes.
>
> I know there are two software implementations that would enable me
> to do this, kexec and 'crash' , redhat's own implementation that allows
> you to pust the dump via network to a remote machine.

I've used kdump to troubleshoot these types of issues in the past:

http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-on-fedora-and-centos-hosts/

Once you have a core file, you can use crash and company to figure out
what caused the kernel to panic.

- Ryan
--
http://prefetch.net