Kickstart config for full disk LVM (no partitions)

kickstart_disk.cfg

# Expects 2 vm disks
# Disk 1 = 1GB
# Disk 2 = DATA (5GB or larger)
# Disk Layout
clearpart --all --initlabel --drives=sda
part biosboot --fstype=biosboot --size=1 --ondisk=sda
part /boot --fstype=xfs --size=512 --grow --ondisk=sda
logvol swap --fstype=swap --name=swap --vgname=vg01 --size=512
logvol /tmp --fstype xfs --name=tmp --vgname=vg01 --size=1024
logvol / --fstype xfs --name=root --vgname=vg01 --size=2048 --grow


%pre
pvremove -y -ff /dev/sdb
pvcreate /dev/sdb
vgcreate vg01 /dev/sdb
vgscan
%end

You could also just tell Anaconda about the VG you made, like:

volgroup vg01 --noformat --useexisting

Also, at least from my experience, you don't need to call vgscan at the end of the %pre section ... but if there's any existing LVM setup, you may need a little more to get it cleaned up. I use something like:

%pre
vgchange -y -ff -a n --select pv_name=/dev/sdb
vgremove -y -ff --select pv_name=/dev/sdb
pvremove -y -ff /dev/sdb
pvcreate /dev/sdb
vgcreate vg01 /dev/sdb
%end