Create a new Debian container for KVM and import it using virt-install

new_debian_kvm.sh

#!/bin/bash
set -e

# Name of the VM
IMAGE=some-fancy-name
# IP address for VM
IP="192.168.122.30"

MIRROR=http://mirror.hetzner.de/debian/packages
PACKAGES="openssh-server htop vim"
PASSWORD=$(pwgen 20 1)


# Generate a new mac address for this machine
MAC="52:54:00$(echo "$IMAGE" | md5sum | head -c 6 | sed -e 's/\(..\)/:\1/g')"

echo "[new kvm] set MAC to $MAC, set IP to $IP"

virsh net-update default add ip-dhcp-host "<host mac='$MAC' name='$IMAGE' ip='$IP' />" --live --config

vmdebootstrap \
	--verbose \
	--grub \
	--image=/srv/kvm/$IMAGE.img \
	--size=40G \
	--mirror="$MIRROR" \
	--distribution=buster \
	--hostname=$IMAGE \
	--enable-dhcp \
	--user="vmmanage/$PASSWORD" \
	--package="$PACKAGES" \
	--lock-root-password \
	--systemd-networkd \
	--sudo \
	--convert-qcow2 \
	--sparse

virt-install \
	-n $IMAGE \
	--memory=4096 \
	--vcpus=4 \
	--disk /srv/kvm/$IMAGE.img,device=disk,bus=virtio,format=qcow2 \
	-w network=default,model=virtio,mac="$MAC" \
	--noautoconsole \
	--autostart \
	--os-variant debian \
	--import

echo "The password is $PASSWORD"
echo "This VM should be available at:"
echo "ssh vmmanage@$IP"