# .img 文件为 QCOW2 格式
wget http://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img

# 创建磁盘文件
qemu-img convert -f qcow2 -O raw focal-server-cloudimg-amd64.img focal-server-cloudimg-amd64.raw
qemu-img resize focal-server-cloudimg-amd64.raw 100G

# 创建磁盘文件：此方式使用 QCOW2 的写时复制特性，hal9000.img 引用 focal-server-cloudimg-amd64.img 文件，空间占用小
qemu-img create -b focal-server-cloudimg-amd64.img -f qcow2 -F qcow2 hal9000.img 10G

apt-get install whois cloud-image-utils

mkpasswd -m sha512crypt 123456 -S "12345342"

cat > user-data <<EOF
#cloud-config

hostname: focal-server
manage_etc_hosts: localhost

users:
  - name: root
    lock_passwd: false
    hashed_passwd: '<the output of mkpassword...>'
    ssh_authorized_keys:
      - ssh-rsa AAAAB3NzaC1y...

# SSH
ssh_pwauth: True
disable_root: false
EOF

cloud-localds user-data.iso user-data

virt-install              \
    --vcpus=4             \
    --ram=8192            \
    --import              \
    --os-variant=ubuntu20.04      \
    --network network=cluster-network,model=virtio                \
    --graphics vnc,listen=0.0.0.0 \
    --noautoconsole               \
    --disk path=/srv/isos/user-data.iso,device=cdrom              \
    --disk path=/srv/image/focal-server-cloudimg-amd64.raw,format=qcow2   \
    --name=focal-server

# --network type=direct,source=enp6s0f0,source_mode=bridge,model=virtio
# --vnc
# https://gist.github.com/smurugap/163b3e2be7676a46c835339f8ba0710f