[Bug 1998229] Re: Adding metadata file into OCI images

[Utkarsh Gupta]

Sponsored the uploads. Thanks.

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https://bugs.launchpad.net/bugs/1998229

Title:
  Adding metadata file into OCI images

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Bionic:
  New
Status in livecd-rootfs source package in Focal:
  New
Status in livecd-rootfs source package in Jammy:
  New
Status in livecd-rootfs source package in Kinetic:
  New

Bug description:
  [ Impact ]

  * The existing Ubuntu container images are being built and published
  without any metadata information. This will introduce a new cloud-like
  path and metadata file, including the image's serial number within
  (which is useful for users to pinpoint a specific revision of the image).

  [ Test Plan ]

  * Run (for any of the affected series):

     $ docker run public.ecr.aws/ubuntu/ubuntu:jammy grep serial
  /etc/cloud/build.info || echo "Image metadata not found"

  * Currently, the output will be

     grep: /etc/cloud/build.info: No such file or directory
     Image metadata not found

  * After the release, I'll trigger the Ubuntu container image
  CI/CD pipelines, and re-run the Docker command from above.

  * The output shall then be similar to:

     serial: 20221125

  [ Where problems could occur ]

  Given that we're adding new content to the filesystem, there's little
  room for regression. A potential pitfall could be the future introduction
  of /etc/cloud/(...) into the minimal filesystem, which would then
  potentially end up being altered.

  [ Other Info ]

  Here the PR I have made :

  https://code.launchpad.net/~samirakarioh/livecd-rootfs/+git/livecd-rootfs/+merge/433431
  https://code.launchpad.net/~samirakarioh/livecd-rootfs/+git/livecd-rootfs/+merge/433432
  https://code.launchpad.net/~samirakarioh/livecd-rootfs/+git/livecd-rootfs/+merge/433433
  https://code.launchpad.net/~samirakarioh/livecd-rootfs/+git/livecd-rootfs/+merge/433572

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