[CentOS] Server dies after kernel upgrade

Wed Jul 17 11:22:45 UTC 2013
Chris Taylor <Chris.Taylor at corp.eastlink.ca>

I cloned the VM that I was having trouble with and installed the new kernel packages I.E kernel, kernel-headers, kernel-firmware, from rpm packs and I was able to get the system to reboot and work no problem. So I went to the production machine and tied using yum to update these same packages, yum also included "bfa-firmware noarch 3.0.3.1-1.el6". Everything installs ok and I reboot the system, but it takes forever to start hanging for a longtime on processes like sendmail, sm-client, proftpd. I am now wondering if this "bfa-firmware noarch 3.0.3.1-1.el6" package is the problem.

Thanks,

Chris


-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Ljubomir Ljubojevic
Sent: Thursday, July 04, 2013 6:01 PM
To: CentOS mailing list
Subject: Re: [CentOS] Server dies after kernel upgrade

On 07/04/2013 05:54 PM, Keith Keller wrote:
> On 2013-07-04, Chris Taylor <Chris.Taylor at corp.eastlink.ca> wrote:
>> I am running a server with CentOS release 6.4 (Final) and the kernel version of 2.6.32-279.19.1.el6.x86_64 and everything looks ok, but when I do a yum update on the kernel to update it to a newer version "2.6.32-358.11.1.el6".
>
> As Lubomir pointed out yesterday, the latest kernel is vulnerable to a 
> DoS attack, so you should probably use a different one.  See Johnny's 
> message for details, and an untested kernel that you could use instead:
>
> http://lists.centos.org/pipermail/centos/2013-July/135671.html
>
>> It will not restart after the required reboot. It will start to load until the task bar at the bottom gets to the end than it stops loading I have been patient with it unless it requires more time to start but after 10min it was still just sitting at the task bar.
>
> You can either try ctrl-d or ESC during the splash screen process (I 
> don't remember exactly which one), or you can edit the grub command 
> line when it runs on boot and remove the "rhgb" and "quiet" options 
> from the kernel options.
>
> --keith
>

There are always 3 kernels available for boot. Only one gets updated. So first check if other two you have are booting properly.
Then you can list all available kernels with "yum list kernel --showduplicate" and select one and install it like "yum install kernel-2.6.32-358.6.2.el6.centos.plus" and see if this one works. If it does, you can use it.

A thing to check is if you need to recompile VM drivers for new kernels.

--
Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe

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