root@ubuntu:/var/log# cat  /home/ubuntu/.ssh/authorized_keys 
root@ubuntu:/var/log#  ---------------  空的哦

root@ubuntu:/etc/cloud/cloud.cfg.d# cat 90_dpkg.cfg 
# to update this file, run dpkg-reconfigure cloud-init
datasource_list: [ NoCloud, ConfigDrive, OpenNebula, DigitalOcean, Azure, AltCloud, OVF, MAAS, GCE, OpenStack, CloudSigma, SmartOS, Bigstep, Scaleway, AliYun, Ec2, CloudStack, Hetzner, IBMCloud, Exoscale, None ]