FYI: systemd in cloud-images

[Scott Moser]

Hey,
  Just wanted to let people know that thanks to Dimitri's help, we now
have systemd in the cloud images.  It is inert by default, but we've set
up a way that you can launch an instance to boot with systemd.  By feeding
the instance some user-data, cloud-init will boot up to its early stages,
see the specified user-data and then set systemd up and reboot into it.

  Specify user-data as you would elsehwere (cloud-localds, user-data to
cloud provider or 'lxc-create -t ubuntu -- --userdata').  The following
should do the trick:

#cloud-config
init_switch:
 target: systemd
 reboot: true

# 'target' can be 'systemd' or 'upstart'.  Best effort is made, but its
# possible this system will break, and probably won't interact well with any
# other mechanism you've used to switch the init system.
#
# 'reboot': [default=true].
#   true: reboot if a change was made.
#   false: do not reboot.