Hi,
I've configured my servers as described here:
http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-...
When I try to start the kdump service via service kdump start, I get the following warnings:
[root@lweb2 boot]# service kdump start No kdump initial ramdisk found. [WARNING] Rebuilding /boot/initrd-2.6.18-92.1.22.el5kdump.img Starting kdump: [FAILED]
First of all I like the idea of automatically building an initrd image with kdump support, but I also need MPP support. Just to give you an example, this is how both machines are booting up:
title RDAC CentOS (2.6.18-92.1.22.el5) with MPP root (hd0,0) kernel /vmlinuz-2.6.18-92.1.22.el5 ro root=/dev/VolGroup00/LogVol00 initrd /mpp-2.6.18-92.1.22.el5.img
At this point I'm wondering how to generate an initrd image with mpp & kdump support.
Also /var/log/messages gives me this:
Jul 17 11:42:27 lweb2 kdump: No crashkernel parameter specified for running kernel Jul 17 11:42:27 lweb2 kdump: failed to start up
I assume that once the server is being rebooted with the correct kernel arguments like crashkernel=128M@16M and the correct initrd with mpp & kdump support the service should start just fine.
Regards,
-Andrei
On Thu, Jul 16, 2009 at 7:38 PM, Matty matty91@gmail.com wrote:
On Thu, Jul 16, 2009 at 11:31 AM, Andrei Ffrunzales@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-...
Once you have a core file, you can use crash and company to figure out what caused the kernel to panic.
- Ryan