Cloud Init

Cloud Init can be used by all Linux systems to customize builds in all cloud platforms.

Install + Utilize

 # Interactive
$ sudo apt install cloud-init
$ sudo dpkg-reconfigure cloud-init
<OR>
# Debian systems
$ sudo vim 01_debian_cloud.cfg
apt_preserve_sources_list: true
manage_etc_hosts: true
system_info:
  default_user:
    name: admin
    sudo: ALL=(ALL) NOPASSWD:ALL
    shell: /bin/bash
    lock_passwd: True
    gecos: Debian
    groups: [adm, audio, cdrom, dialout, dip, floppy, netdev, plugdev, sudo, video]
    sudo: ["ALL=(ALL) NOPASSWD:ALL"]
    shell: /bin/bash

# Ubuntu Systems
$ sudo vim /etc/cloud/cloud.cfg
# Change ubuntu to the username you want. 
system_info:
 # This will affect which distro class gets used
 distro: ubuntu
 # Default user name + that default users groups (if added/used)
 default_user:
   name: ubuntu
   lock_passwd: True
   gecos: Ubuntu

$ sudo cloud-init clean --logs
$ sudo cloud-init init --local
$ sudo cloud-init init
$ sudo cloud-init modules --mode=config
$ sudo cloud-init modules --mode=final
# On a server build , the ubuntu user still exists. Lets change that
$ sudo pkill -KILL -u ubuntu
$ sudo deluser ubuntu
$ sudo rm -rf /home/ubuntu

References

https://cloud-init.io/
https://www.digitalocean.com/community/tutorials/how-to-use-cloud-config-for-your-initial-server-setup
https://stackoverflow.com/questions/23065673/how-to-re-run-cloud-init-without-reboot