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grub-btrfs

This is a version 1.xx of grub-btrfs

Description

grub-btrfs, Include btrfs snapshots at boot options. (grub menu)

What does grub-btrfs v1.xx do :

Simple rollback using snapshots you made previously.

  • Automatically List snapshots existing on root partition (btrfs).

  • Automatically Detect if "/boot" is in separate partition.

  • Automatically Detect kernel, initramfs and intel microcode in "/boot" directory on snapshots. (For custon name, see below.)

  • Automatically Create corresponding "menuentry" in grub.cfg , which ensures a very easy rollback.

How to use it:

Add this lines to /etc/default/grub:

  • GRUB_BTRFS_SUBMENUNAME="ArchLinux Snapshots"

    (Name menu appearing in grub.)

  • GRUB_BTRFS_PREFIXENTRY="Snapshot:"

    (Add a name ahead your snapshots entries.)

  • GRUB_BTRFS_DISPLAY_PATH_SNAPSHOT="true"

    (Show full path snapshot or only name)

  • GRUB_BTRFS_TITLE_FORMAT="p/d/n"

    (Custom title, shows/hides p"prefix" d"date" n"name" in grub-menu, separator "/", custom order available)

  • GRUB_BTRFS_NKERNEL=("vmlinuz-linux")

    (Use only if you have custom kernel name or auto-detect failed.)

  • GRUB_BTRFS_NINIT=("initramfs-linux.img" "initramfs-linux-fallback.img")

    (Use only if you have custom initramfs name or auto-detect failed.)

  • GRUB_BTRFS_INTEL_UCODE=("intel-ucode.img")

    (Use only if you have custom intel-ucode or auto-detect failed.)

  • GRUB_BTRFS_LIMIT="100"

    (Limit the number of snapshots populated in the GRUB menu.)

  • GRUB_BTRFS_SUBVOLUME_SORT="descending"

    (Sort the found subvolumes by newest first ("descending") or oldest first ("ascending"). If "ascending" is chosen then the $GRUB_BTRFS_LIMIT oldest subvolumes will populate the menu.)

  • GRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="true"

    (Show snapshots found during run "grub-mkconfig")

  • GRUB_BTRFS_SHOW_TOTAL_SNAPSHOTS_FOUND="true"

    (Show Total of snapshots found during run "grub-mkconfig")

Generate grub.cfg (on Archlinux use grub-mkconfig -o /boot/grub/grub.cfg )

grub-btrfs automatically generates snapshots entries.

You will see it appear differents entries (e.g : Snapshot: [2014-02-12 11:24:37] my snapshot name overkill )

TO DO

  • Display name of microcode in menuentry when available
  • ignore specific path

discussion

Pour les francophones : https://forums.archlinux.fr/viewtopic.php?f=18&t=17177