root@install:/etc/cloud# echo cloud-init cloud-init/datasources multiselect     Ec2, None | debconf-set-selections -
root@install:/etc/cloud# debconf-show cloud-init
* cloud-init/datasources: Ec2, None
root@install:/etc/cloud# cat cloud.cfg.d/90_dpkg.cfg
# to update this file, run dpkg-reconfigure cloud-init
datasource_list: [ ConfigDrive, Ec2, None ]
root@install:/etc/cloud# dpkg-reconfigure -f noninteractive cloud-init
Leaving 'diversion of /etc/init/ureadahead.conf to /etc/init/ureadahead.conf.disabled by cloud-init'
root@install:/etc/cloud# debconf-show cloud-init
* cloud-init/datasources: ConfigDrive, Ec2, None