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Re: [Xen-users] How to stop yum update on CentOS 5.1 to modify grub

To: Rudi Ahlers <Rudi@xxxxxxxxxxx>
Subject: Re: [Xen-users] How to stop yum update on CentOS 5.1 to modify grub
From: Bas Mevissen <abuse@xxxxxxxxxxxxxx>
Date: Mon, 07 Apr 2008 16:40:27 +0200
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Rudi Ahlers wrote:

That's what I'm fearing as well. What if the Xen kernel crashes. In this case I'd still need to drive out to the DC - which I don't quite want.

I've installed an IPMI2 module in my server. Costs about Eur 50 and gives you remote monitors (temperature, fans) and serial port-like console. Saved me a few trips to the DC already.

I guess I'll just exclude the normal kernel from the updates as you suggest. P.S. Do you know if one could set a backup / fail-safe kernel in grub, which can automatically boot if thew default kernel gives problems?

Just set UPDATEDEFAULT to "yes" if you want the latest Xen kernel by default and to "no" otherwise. Set DEFAULTKERNEL to "kernel-xen" and simply leave that other kernel around.

Grub is no watchdog. So it cannot detect boot failure. If you want something like that, arrange a budget and contact me :-)


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