dracut/test/TEST-11-LVM/create-root.sh

#!/bin/sh
# don't let udev and this script step on eachother's toes
for x in 64-lvm.rules 70-mdadm.rules 99-mount-rules; do
    : > "/etc/udev/rules.d/$x"
done
rm -f -- /etc/lvm/lvm.conf
udevadm control --reload
udevadm settle
# save a partition at the beginning for future flagging purposes
sfdisk /dev/sda << EOF
,2M
,20M
,20M
,20M
EOF
udevadm settle
for i in sda2 sda3 sda4; do
    lvm pvcreate -ff -y /dev/$i
done \
    && lvm vgcreate dracut /dev/sda[234] \
    && lvm lvcreate -l 100%FREE -n root dracut \
    && lvm vgchange -ay \
    && mke2fs /dev/dracut/root \
    && mkdir -p /sysroot \
    && mount /dev/dracut/root /sysroot \
    && cp -a -t /sysroot /source/* \
    && umount /sysroot \
    && sleep 1 \
    && lvm lvchange -a n /dev/dracut/root \
    && sleep 1 \
    && echo "dracut-root-block-created" | dd oflag=direct,dsync of=/dev/sda1
sync
poweroff -f