Create `admin` user in cloud-init

README.md

Creating a user called admin using cloud-init

Cloud-Init may not create a user literally called admin even though the configuration might be valid.

Debugging

Log files are available:

cat /var/log/cloud/cloud-init.log
cat /var/log/cloud/cloud-init-output.log

Error

The error one receives from cloud-init module execution

useradd: group admin exists - if you want to add this user to that group, use -g.

Solution

It turns out that there already exists an admin group beforehand in GNU/Linux and cloud-init will generally also create a group according to <username>, in this case admin causing conflicts.

The solution is to let cloud-init know that it shouldn't create an additional group using no_user_group: true

user-data.yml

#cloud-config
ssh_pwauth: true
preserve_hostname: false
hostname: mydevicename0
timezone: Europe/Berlin

users:
  - name: admin
    plain_text_passwd: mySuperAdminPassword
    no_user_group: true # `admin` group already exists in GNU/Linux, don't insist on create another one
    groups: sudo, adm
    sudo: ALL=(ALL) NOPASSWD:ALL
    shell: /bin/bash

Thank you for this. I spent hours trying to find why i couldn't login to my cloud-init ubuntu vm on proxmox, it's insane..