[Bug 2047796] [NEW] autoinstall: user-data validation fails for users or packages if they contain list of object

[Yao Wei]

Public bug reported:

The user-data it will be converted into an object with integer key.
However, cloud-init considers such merged list as an object instead of
list, and the schema validator considers object and list differently,
causing issues like:

* cannot define a user in user-config:

autoinstall:
  user-data:
    users:
    - name: ubuntu
      plain_text_passwd: 'ubuntu'
      home: /home/ubuntu
      shell: /bin/bash
      lock_passwd: false
      gecos: Ubuntu all-oem-init
      groups: [adm, cdrom, dip, lxd, sudo]

* cannot use packages[#].apt or packages[#].snap which contains a list
of packages:

autoinstall:
  user-data:
    packages:
    - snap:
      - certbot
      - [juju, --edge]
      - [lxd, --channel=5.15/stable]
    - apt:
      - mg

These schemas documented in cloud-init documentations should be usable.

** Affects: subiquity (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2047796

Title:
  autoinstall: user-data validation fails for users or packages if they
  contain list of object

Status in subiquity package in Ubuntu:
  New

Bug description:
  The user-data it will be converted into an object with integer key.
  However, cloud-init considers such merged list as an object instead of
  list, and the schema validator considers object and list differently,
  causing issues like:

  * cannot define a user in user-config:

  autoinstall:
    user-data:
      users:
      - name: ubuntu
        plain_text_passwd: 'ubuntu'
        home: /home/ubuntu
        shell: /bin/bash
        lock_passwd: false
        gecos: Ubuntu all-oem-init
        groups: [adm, cdrom, dip, lxd, sudo]

  * cannot use packages[#].apt or packages[#].snap which contains a list
  of packages:

  autoinstall:
    user-data:
      packages:
      - snap:
        - certbot
        - [juju, --edge]
        - [lxd, --channel=5.15/stable]
      - apt:
        - mg

  These schemas documented in cloud-init documentations should be
  usable.

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