removing rpms in %pre during kickstart upgrade installation

[Shabazian, Chip]

I'm not sure how you are starting the kickstart, but the way I would
probably do this is to simply remove the rpms BEFORE kickstarting the
box.  As long as I was touching the box anyway, I would copy the
kickstart kernel down to the box, and set it up in grub to boot.  This
way you would still be only touching each box once.
 
Chip

________________________________

From: kickstart-list-bounces at redhat.com
[mailto:kickstart-list-bounces at redhat.com] On Behalf Of Sean Goller
Sent: Friday, October 06, 2006 11:22 AM
To: kickstart-list at redhat.com
Subject: removing rpms in %pre during kickstart upgrade installation



Hi,

            I'm currently embroiled in a project to upgrade a RHEL3
installation to RHEL4 unattended via kickstart.

 

            I need to do some cleanup work in the %pre section on the
existing installation. (installation state is known and fixed) More
specifically, I need to remove some rpms. I have tried this two ways.
First, I tried using rpm -r to reset the root of the effective
filesystem to /mnt/sysimage (I mount the filesystem manually) but that
didn't seem to work for some reason. What I'm doing now is mounting the
partition, writing a script (removerpms.sh) into /mnt/sysimage/tmp, then
running chroot /mnt/sysimage /tmp/removerpms.sh. Afterwards I umount the
partition. The rpms are successfully removed, however anaconda
subsequently errors out because the umount has failed. I found that
/proc was getting mounted as a side effect of the script running, so I
added a umount for that. Here's the weird part: If I deliver the
kickstart file over the network, and use an HTTP-based install source,
it works. However, if I change the kickstart file to use CD
installation, and put it on the CD, it errors out because umount doesn't
work. /etc/mtab reveals nothing mounted other than /mnt/sysimage, 

 

            Any thoughts on how to resolve this? I'm about to compile a
static version of lsof to check on this, but if anyone has successfully
solved this problem before (removing rpms in %pre via kickstart) I'd
appreciate some pointers. Google has not been good to me.

 

 

-Sean.

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