https://fedoraproject.org/wiki/Changes/VarSubvol4SilverblueKinoite == Summary == Silverblue and Kinoite: For new clean automatic (guided) installations, create a "var" subvolume to be mounted at /var. == Owner == * Name: [[User:chrismurphy| Chris Murphy]] * Email: bugzilla@xxxxxxxxxxxxxxxxx == Detailed Description == Currently, Silverblue and Kinoite mimic other Fedora desktops. There is a "root" subvolume mounted at `/` and a "home" subvolume mounted at `/home`. This proposal adds a "var" subvolume to be mounted at `/var`. The "var" subvolume will be located at the top-level of the Btrfs file system, along-side the "root" and "home" subvolumes. An entry in `/etc/fstab` will mount it at `/var` during startup. == Benefit to Fedora == Users who opt into Btrfs features like snapshots and rollbacks. * By moving /var into its own subvolume, it will be excluded from snapshots and rollbacks of the "root" subvolume, which contains `/etc` and `/usr`. * Users will find it straightforward to rollback "root" while not rolling back "var": including logs, VMs, databases, flatpaks, etc. * The ability to snapshot only "var" and use Btrfs send/receive to replicate only "var" permits for an efficient way of backing up the variable system data. ** A clean install can restore the "root", therefore it doesn't strictly need to be backed up. Meanwhile "var" and "home" can be restored using snapshot replication via send/receive. == Scope == * Proposal owners: ** changes to lorax and anaconda as needed so that Silverblue and Kinoite variants have their own installation kickstart, such that automatic/guided installation automatically creates "var". *** possible liability, determine whether the the addition of /var mount point for Btrfs scheme results in /var mount point for other schemes (and inhibit) == Upgrade/compatibility impact == Change will not be applied to upgrades. But we can document steps to apply the change to existing installations. == How To Test == * Do a clean installation and check `df` and `/etc/fstab` for an explicitly listed `/var` mount point. == User Experience == * The change won't generally be noticeable to users * Users will see an additional `/var` mount point in /etc/fstab, and `df` * Some utilities, notably backup programs like borg backup, and rsync with -x option, will treat Btrfs subvolumes as separate file systems and may not descend (recursively) into them. == Dependencies == * Anaconda/blivet, lorax, and possibly kickstarts == Contingency Plan == * Contingency deadline: beta freeze * Blocks release? No == Documentation == No significant documentation is planned other than this change proposal. == Release Notes == -- Ben Cotton He / Him / His Fedora Program Manager Red Hat TZ=America/Indiana/Indianapolis _______________________________________________ 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 on the list, report it: https://pagure.io/fedora-infrastructure
