On Tue, 2005-01-25 at 00:03 -0500, Jeremy Katz wrote: > > Next, let's create a file to use as the backing for our Fedora install. > For example purposes, I'll create one of a size of 1 GB. > dd if=/dev/zero of=/root/fedora.img bs=1M count=1024 To make a sparse file, I used: dd if=/dev/zero of=fedora.img bs=1M count=1 seek=1024 This way, my file looked like 1GB, but only allocated space upon use. > Now, create an ext3 filesystem on this image. > mke2fs -F -j /root/fedora.img > You should now be able to mount your new temporary rootfs on a temporary > mountpoint, say /mnt > mount -o loop /root/fedora.img /mnt > Now, we can install whatever basesystem we want into this chroot. Make > sure that your yum configuration points to a valid repository. Then, > decide what group(s) you want to install. I'd recommend starting with > Base (or for the space constrained, Core, but this is more difficult). > Then, run > yum --installroot=/mnt -y groupinstall Base > Cool trick! Didn't know that I could do that! I did find that I needed to 'rpm --root /mnt --import <various RPM-GPG-KEYs> to make yum happy. I also needed to create /mnt/var/cache/yum so that it could write the .gpgkeyschecked.yum file. I suppose that if I turned off gpg checking, I would have been fine. > Now, go get some coffee and have a snack. It's going to take a little > while :-) > Using rawhide as of this morning, I had dep issues with dmraid (needs to be rebuilt against new device-mapper) and stunnel (needs words). I excluded dmraid and stunnel and the install went ok. > Come back and if everything went okay, you'll have a minimal install > in /mnt. Now, for the ugly part, we need to set up some basic bits on > the filesystem that have to be different for xen right now. These > include a) creating some required device nodes in /dev > since we're not using an initrd and b) setting up an /etc/fstab > for i in console null zero ; do MAKEDEV -d /mnt -x $i ; done > for i in console null zero; do MAKEDEV -d /mnt/dev -x $i ; done Otherwise, those device files end up in / instead /dev on the filesystem image. > For the /etc/fstab, something simple like the following should work > /dev/sda1 / ext3 defaults > 1 1 > none /dev/pts devpts gid=5,mode=620 > 0 0 > none /dev/shm tmpfs defaults > 0 0 > none /proc proc defaults > 0 0 > none /sys sysfs defaults > 0 0 Would it be necessary to have /sys in fstab? The initscripts mount it automagically themselves. Haven't performed any testing myself to validate with a Xen config. -- David Hollis <dhollis@xxxxxxxxxxxxxx>
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