making-qcow2-from-arch-of-arch.sh

qemu-img create -f qcow2 arch-root.qcow2 64G
sudo modprobe nbd
sudo qemu-nbd -c /dev/nbd0 arch-root.qcow2 
sudo cfdisk -z /dev/nbd0
# make dos partition table
# make a new partition, make it bootable
sudo mkfs.ext4  /dev/nbd0p1
sudo mount /dev/nbd0p1 /mnt/
sudo pacstrap -c   /mnt base linux-lts curl openssh dhcpcd grub vim
sudo arch-chroot /mnt

## edit /etc/mkinitcpio.conf
MODULES=(virtio_pci virtio_blk virtio_net virtio_scsi virtio_console )

#
mkinitcpio -P

systemctl enable dhcpcd
systemctl enable sshd
mkdir -p -m 700 ~/.ssh


curl -o ~/.ssh/authorized_keys  https://github.com/vrdhn.keys

## just in case ... 
passwd

grub-install --target=i386-pc /dev/nbd0
grub-mkconfig -o /boot/grub/grub.cfg

pacman -Scc
exit


sudo lsof | grep /mnt

sudo umount /mnt
sudo qemu-nbd -d /dev/nbd0
sudo rmmod nbd


qemu-img convert -c  -O qcow2 arch-root.qcow2 arch-root-small.qcow2

## Run using virt-manager or virsh

virsh -c qemu:///system list
virsh -c qemu:///system domifaddr --full --domain <id from above, 1,2 etc>

## get the IP
ssh [email protected]