Wiki - https://fedoraproject.org/wiki/Changes/EROFSforLiveMedia Discussion thread - https://discussion.fedoraproject.org/t/f42-change-proposal-switch-to-erofs-for-live-media-self-contained/142519 This is a proposed Change for Fedora Linux. This document represents a proposed Change. As part of the Changes process, proposals are publicly announced in order to receive community feedback. This proposal will only be implemented if approved by the Fedora Engineering Steering Committee. == Summary == Switch the read-only filesystem image format from SquashFS to EROFS for Fedora live media. == Owner = * Name: [[User:Ngompa| Neal Gompa]] for kiwi produced media * Email: ngompa13@xxxxxxxxx * Name: [[User:Dustymabe| Dusty Mabe]] for CoreOS produced media * Email: dusty@xxxxxxxxxxxxx == Detailed Description == In recent years, there has been increasing adoption of a new, more advanced read-only filesystem for a variety of use-cases called the [https://erofs.docs.kernel.org/en/latest/ Enhanced Read-Only FileSystem (EROFS)]. Support for EROFS as the backing read-only filesystem for live environments was introduced in Dracut v103. This change switches over the following live media to use EROFS instead of SquashFS: * all kiwi-produced live media. Currently: ** KDE Desktop ** KDE Mobile ** LXQt ** MiracleWM ** COSMIC ** Xfce ** Budgie * Fedora CoreOS Live media ** i.e. fedora-coreos-42.2025XXXX.91.0-live-iso.x86_64.iso Note: When future editions/spins get moved to kiwi they will inherit this change. == Feedback == == Benefit to Fedora == EROFS is considerably more actively developed than SquashFS, and offers more modern file system features that can be utilized in the future. == Scope == * Proposal owners: ** Kiwi: Merge [https://pagure.io/fedora-kiwi-descriptions/pull-request/105 fedora-kiwi-descriptions#105] ** CoreOS: Implement [https://github.com/coreos/fedora-coreos-tracker/issues/1852 fedora-coreos-tracker#1852]. This will require work in OSBuild, since OSBuild builds the Fedora CoreOS Live ISO now. * Other developers: * Release engineering: [https://pagure.io/releng/issue/12520 #12520] * Policies and guidelines: N/A (not needed for this Change) * Trademark approval: N/A (not needed for this Change) * Alignment with the Fedora Strategy: N/A (not needed for this Change) == Upgrade/compatibility impact == There should be no visible impact. This only affects live media used to make fresh installations. == How To Test == Once the change is applied, users can grab nightly Fedora live images that fall in scope (such as the KDE and LXQt images) to test it. Simply booting the images in a VM and installing the environment is a sufficient test. For Fedora CoreOS, nightly [https://builds.coreos.fedoraproject.org/browser?stream=rawhide&arch=x86_64 rawhide installation media] can be used to perform an [https://docs.fedoraproject.org/en-US/fedora-coreos/bare-metal/#_installing_from_live_iso install]. == User Experience == There should be no visible impact to users. Live installations continue to work as expected, and live environments may be slightly faster. == Dependencies == N/A. Everything has been in place and supported since Fedora Linux 41. == Contingency Plan == * Contingency mechanism: Revert back to SquashFS. * Contingency deadline: Final Freeze. * Blocks release? Yes. == Documentation == N/A (not a System Wide Change) == Release Notes == Fedora Linux live environments now use the Enhanced Read-Only FileSystem (EROFS), a modern, feature-rich read-only filesystem. -- Aoife Moloney Fedora Operations Architect Fedora Project Matrix: @amoloney:fedora.im IRC: amoloney -- _______________________________________________ devel-announce mailing list -- devel-announce@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-announce-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel-announce@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue -- _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
