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doc: include contents for rock in ubuntu #2686

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18f33db
doc: include contents for rock
zhijie-yang Jul 31, 2026
f36c4d5
doc: remove pebble and adjust rootfs wording
zhijie-yang Aug 21, 2026
5ec5ff0
fix: rootfs branch name
zhijie-yang Aug 21, 2026
0b8a52c
doc: remove Questing
zhijie-yang Aug 21, 2026
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8 changes: 6 additions & 2 deletions ubuntu/content.md
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Expand Up @@ -34,9 +34,13 @@ Starting from [Ubuntu 24.10 "Oracular Oriole"](https://discourse.ubuntu.com/t/or

# How is the rootfs built?

## Ubuntu 25.10 "Questing Quokka" and earlier

The tarballs published by Canonical, referenced by `dist-*` tags in https://git.launchpad.net/cloud-images/+oci/ubuntu-base Git repository, are built from scripts that live in [the livecd-rootfs project](https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+ref/ubuntu/master), especially `live-build/auto/build`. The builds are run on Launchpad. For build history see `livefs` build pages of individual releases on Launchpad:

- [Jammy](https://launchpad.net/~cloud-images-release-managers/+livefs/ubuntu/jammy/ubuntu-oci)
- [Noble](https://launchpad.net/~cloud-images-release-managers/+livefs/ubuntu/noble/ubuntu-oci)
- [Questing](https://launchpad.net/~cloud-images-release-managers/+livefs/ubuntu/questing/ubuntu-oci)
- [Resolute](https://launchpad.net/~cloud-images-release-managers/+livefs/ubuntu/resolute/ubuntu-oci)

## Ubuntu 26.04 LTS "Resolute Raccoon" and later

Starting from Ubuntu 26.04 LTS, the rootfs is no longer built via `livefs`. Instead, the image is built directly with [Rockcraft](https://github.com/canonical/rockcraft) from the recipe on the `main` branch of the same [ubuntu-base repo](https://git.launchpad.net/cloud-images/+oci/ubuntu-base), and the rootfs tarballs under the `<codename>-<release>` tags of the [ubuntu-base repo](https://git.launchpad.net/cloud-images/+oci/ubuntu-base) are exported from the Rockcraft build artifacts.