Hi,<br><br>I've configured my servers as described here:<br><br><a href="http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-on-fedora-and-centos-hosts/" target="_blank">http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-on-fedora-and-centos-hosts/</a><br>
<br>When I try to start the kdump service via service kdump start, I get the following warnings:<br><br>[root@lweb2 boot]# service kdump start<br>No kdump initial ramdisk found. [WARNING]<br>Rebuilding /boot/initrd-2.6.18-92.1.22.el5kdump.img<br>
Starting kdump: [FAILED]<br><br>First of all I like the idea of automatically building an initrd image with kdump support, but<br>I also need MPP support. Just to give you an example, this is how both machines are booting up:<br>
<br>title RDAC CentOS (2.6.18-92.1.22.el5) with MPP<br>root (hd0,0)<br>kernel /vmlinuz-2.6.18-92.1.22.el5 ro root=/dev/VolGroup00/LogVol00<br>initrd /mpp-2.6.18-92.1.22.el5.img<br><br>At this point I'm wondering how to generate an initrd image with mpp & kdump support.<br>
<br><br>Also /var/log/messages gives me this:<br><br>Jul 17 11:42:27 lweb2 kdump: No crashkernel parameter specified for running kernel<br>Jul 17 11:42:27 lweb2 kdump: failed to start up<br><br>I assume that once the server is being rebooted with the correct kernel arguments like<br>
crashkernel=128M@16M and the correct initrd with mpp & kdump support the service<br>should start just fine.<br><br>Regards,<br><br>-Andrei<br><br><div class="gmail_quote">On Thu, Jul 16, 2009 at 7:38 PM, Matty <span dir="ltr"><<a href="mailto:matty91@gmail.com">matty91@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">On Thu, Jul 16, 2009 at 11:31 AM, Andrei F<<a href="mailto:frunzales@gmail.com">frunzales@gmail.com</a>> wrote:<br>
> Hello,<br>
><br>
> I have CentOS 5.2 installed on two of the afore-mentioned blades.<br>
> I've noticed that the OS started to crash lately (kernel panic) and I've<br>
> been assigned the task to troubleshoot this issue.<br>
><br>
> I would like to know what is the best way of recovering the kernel<br>
> dump after the OS crashes.<br>
><br>
> I know there are two software implementations that would enable me<br>
> to do this, kexec and 'crash' , redhat's own implementation that allows<br>
> you to pust the dump via network to a remote machine.<br>
<br>
</div>I've used kdump to troubleshoot these types of issues in the past:<br>
<br>
<a href="http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-on-fedora-and-centos-hosts/" target="_blank">http://prefetch.net/blog/index.php/2009/07/06/using-kdump-to-get-core-files-on-fedora-and-centos-hosts/</a><br>
<br>
Once you have a core file, you can use crash and company to figure out<br>
what caused the kernel to panic.<br>
<br>
- Ryan<br>
<font color="#888888">--<br>
<a href="http://prefetch.net" target="_blank">http://prefetch.net</a></font><br></blockquote></div>