Plain mode without mirroring user account

[afbjorklund]

Description

Currently we still create the user, even when running in plain mode.

We don't have to do this, we can add the ssh key to the default user?

More similar to the old "vagrant" user

But either "ubuntu"* or maybe "lima"

The key would move from current "users.ssh-authorized-keys" (sic) to the root.

Since we are not mirroring users, we don't need to add ~/.ssh but only _config

The "lima" user would still be created (like before), but not mirror host information.

users:
  - name: "lima"
    uid: "1000"
    gecos: "Lima"
    homedir: "/home/lima.linux"
    shell: /bin/bash
    sudo: ALL=(ALL) NOPASSWD:ALL
    lock_passwd: true
    ssh-authorized-keys:

---

* that is: whatever is in cloud.cfg in the image that is currently being used

# A set of users which may be applied and/or used by various modules
# when a 'default' entry is found it will reference the 'default_user'
# from the distro configuration specified below
users:
  - default

# System and/or distro specific settings
# (not accessible to handlers/transforms)
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
    groups: [adm, cdrom, dip, lxd, sudo]
    sudo: ["ALL=(ALL) NOPASSWD:ALL"]
    shell: /bin/bash

https://cloudinit.readthedocs.io/en/latest/explanation/configuration.html

The user name probably needs reporting back, similar to SSH Local Port

It is needed to connect, just like the ssh host keys for strict host key checking:

• Optionally allow the user to enable strict host key checking #3775