Jeremy Katz wrote, On 08/15/2009 04:45 AM:
On Saturday, August 15 2009, Mads Kiilerich said:
I have figured out that livecd-creator through imgcreate creates a
/etc/sysconfig/mkinitrd. When rpms runs mkinitrd from their %post script
then it will exec mkliveinitrd and use the configured module list.
AFAICS livecd-creator then picks up the initrd from /boot, and the end
result after having written the iso to usb with livecd-iso-to-disk is
that it ends up in /syslinux/initrd0.img.
Correct
But if I overwrite the /boot/initrd* in %post like this:
/sbin/mkinitrd -f /boot/initrd-$(rpm -q kernel --qf
'%{version}-%{release}.%{arch}\n').img $(rpm -q kernel --qf
'%{version}-%{release}.%{arch}\n')
then it won't be used.
What am I doing wrong? When is the initrd picked up? What is the code flow?
%post runs after we've set up the boot loader bits. Otherwise, it
%wouldn't be the last thing run.
I intuitively expected %post to be the last step in the kickstart
process, but to come before the "taking a snapshot of the chroot and
transforming it to something bootable" part. But no one size fits all.
Ok. Perhaps different %posts could make some things simpler.
So if you want to do this, you have to
do something like we did for Fedora 8 on the initial move of initramfs
stuff into mkinitrd proper. See commit
11dbd0bb5ba4b845e80109e990e4e780ca402218
Oh yeah. livecd-creator thinks (knows) that it is creating a CD, and
thus the initrd is (has to be) in $LIVE_ROOT/isolinux/initrd0.img.
So
/sbin/mkinitrd -f $LIVE_ROOT/isolinux/initrd0.img $(rpm -q kernel
--qf "%{version}-%{release}.%{arch}")
in %post should do the trick? I will try that.
I tried and was looking for $LIVE_ROOT/syslinux/initrd0.img as it can be
seen on running USB sticks, but that mangling is only done later by
livecd-iso-to-disk ...
I have had some problems with things copied to $LIVE_ROOT in nonchrooted
%post not showing up on the final system, but that might be
livecd-iso-to-disk too - I will try harder.
Thanks!
/Mads
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