Feature changed by: Arvin Schnell (aschnell) Feature #318392, revision 3 Title: Install into btrfs subvolume Requested by: Thorsten Kukuk (kukuk) Partner organization: openSUSE.org Description: If you do a rollback of SLE12 the very first time, the original root volume is no longer reacheable and will never be automatically removed, means we have a disk space leak here. The reason is, that the original installation is not a subvolume/snapshot and thus will not show up in /.snapshots. If we install on btrfs, and snapshots/rollback is enabled, we should instead install into a subvolume /.snapshots/1/snapshot and make that the new root. Business case (Partner benefit): openSUSE.org: Fix a very huge disk space leak problem. Discussion: #1: Thorsten Kukuk (kukuk) (2015-01-23 14:58:31) Arvin, I think you can describe better, how the initial instannation into a subvolume has to look like, that we see it later in /.snapshots/ ? + #2: Arvin Schnell (aschnell) (2015-01-26 18:13:31) (reply to #1) + I would implement this as follows: + Required steps during installation: + * right after libstorage has created the root filesystem, snapper must + be called to create the config, a first read-write snapshot and set the + default subvolume + * the root filesystem must be mounted to use the new default subvolume + * snapper must not be called again later by YaST + Problems: + * libstorage does not know whether snapshots/rollback are enabled, new + API required + * snapper does not have the required command, needs implementation + * snapper does not work with a chrooted target, needs implementation + * snapper is needed in the instsys (not even all requirements are + there) + The problems make it difficult to do a proof-of-concept test. + Further question: + * Should there only be the option "rollback on / off?" or should it + also be possible to configure snapper without rollbacks (that is + installing into subvolume)? + * There is no easy way for the user to enable rollbacks later on. Is + that OK? -- openSUSE Feature: https://features.opensuse.org/318392