[CentOS] can i config/build/boot a new kernel on centos 5.5 with LVM?

[Peter Kjellstrom]

On Friday 20 August 2010, Robert P. J. Day wrote:
>   (disclaimer:  i'll be a bit vague about some of this since i don't
> have a test system to try to reproduce it until later today or this
> weekend.)
>
>   during a RHEL SA course i was teaching this week, i was using both
> centos 5.5 and RHEL 6.0 beta 2 and, as a fun exercise, i was showing
> how to "git" checkout the kernel source tree, configure it, build,
> install and boot to a new kernel.

Rolling your own kernel is really considered a last resort on CentOS/RHEL. It 
seems like a strange exercise to select for an RHEL SA course (IMHO). If you 
really want/need to do this then reading through 
http://wiki.centos.org/HowTos/Custom_Kernel may be a good idea.

> sadly, at no time did that 
> exercise actually work, so i just want to ask a general question --
> should i, with a standard install of centos 5.5 with all of the
> required development packages, be able to checkout the kernel source,
> and build and boot a new kernel?

If done properly, yes. However it's not like just any git-checked-out 
kernel+config will make you happy.

>   upon reflection, the issues might have to do with the fact that LVM
> was in use and perhaps the initrd didn't have LVM support built in
> but, again, i can't check that until later today at the earliest.
...

LVM will be automatically added to the initrd by mkinitrd (assuming the kernel 
it tries to use has the required modules).

/Peter
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