[Bug 1933711] Re: defining tmpfs /tmp in autoinstall config fails

[Todd Taft]

The proposed fix works for me, both in the both in the simple example I
posted, as well as a more complex configuration that I didn't post.

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Title:
  defining tmpfs /tmp in autoinstall config fails

Status in subiquity package in Ubuntu:
  Triaged

Bug description:
  Attempting to creat a tmpfs /tmp partition with the Ubuntu 20.04
  autoinstaller fails with the error: __init__() missing 1 required
  positional argument: 'device'

  The relevant section of the user-data file I'm attempting is:
      - id: tmpfs1
        type: mount
        spec: "none"
        path: "/tmp"
        options: size=4194304
        fstype: "tmpfs"

  This section is copied directly from https://curtin.readthedocs.io/en/latest/topics/storage.html (changing the path).  
  The full file is attached.

  Autoinstall succeeds if all of the lines listed above are deleted.

  I'm using the daily ISO autoinstall image downloaded using the script
  at https://github.com/covertsh/ubuntu-autoinstall-generator .

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