====== cloud-init ======

  * https://cloudinit.readthedocs.io/en/latest/

  * libvirt : https://cloudinit.readthedocs.io/en/latest/howto/run_cloud_init_locally.html#libvirt
  * QEMU : https://cloudinit.readthedocs.io/en/latest/tutorial/qemu.html

  * Exemples : https://cloudinit.readthedocs.io/en/latest/reference/examples.html