grub-btrfs

This is a version 3.xx of grub-btrfs

BTC donation address: 1Lbvz244WA8xbpHek9W2Y12cakM6rDe5Rt

Description

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

What does grub-btrfs v3.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.

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

• Automatically detect snapper and use snapper's snapshot description if available.

How to customize it:

You have the possibility to modify many parameters. Add this lines to /etc/default/grub:

• GRUB_BTRFS_SUBMENUNAME="Arch Linux 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, weird reaction with snapper)

• 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=("kernel-custom")

  (Use it only if you have a custom kernel name)

• GRUB_BTRFS_NINIT=("initramfs-custom.img" "initrd.img-custom")

  (Use it only if you have a custom initramfs name)

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

  (Use it only if you have custom intel-ucode)

• GRUB_BTRFS_LIMIT="50"

  (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 number of snapshots found during run "grub-mkconfig")

• GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("var/lib/docker")

  (Ignore specific path during run "grub-mkconfig")

• GRUB_BTRFS_SNAPPER_CONFIG="root"

  (Snapper's config name to use)

• GRUB_BTRFS_DISABLE="true"

  (Disable grub-btrfs)

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

grub-btrfs automatically generates snapshots entries.

You will see it appear differents entries (e.g : Snapshot: 2018-01-03 15:08:41 @test1 )

Automatically update grub

If you would like grub to automatically update when Snapper timeline snapshots and cleanups occur, simply install 10-update_grub.conf in the following locations:

• /etc/systemd/system/snapper-timeline.service.d/
• /etc/systemd/system/snapper-cleanup.service.d/

Once the configuration files are in place, systemctl daemon-reload should be run to reload the units and make the changes active.

Discussion

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

Special thanks for assistance and contributions

• maximbaz
• crossroads1112
• penetal
• wesbarnett
• Psykar
• anyc
• daftaupe
• N-Parsons