This is a version 2.xx of grub-btrfs
grub-btrfs, Include btrfs snapshots at boot options. (grub menu)
Simple rollback using snapshots you made previously.
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Automatically List snapshots existing on root partition (btrfs).
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Automatically Detect if "/boot" is in separate partition.
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Automatically Detect kernel, initramfs and intel microcode in "/boot" directory on snapshots. (For custom name, see below.)
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Automatically Create corresponding "menuentry" in grub.cfg , which ensures a very easy rollback.
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Automatically detect snapper and use snapper's snapshot description if available.
Add this lines to /etc/default/grub:
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GRUB_BTRFS_SUBMENUNAME="Arch Linux Snapshots"
(Name menu appearing in grub.)
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GRUB_BTRFS_PREFIXENTRY="Snapshot:"
(Add a name ahead your snapshots entries.)
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GRUB_BTRFS_DISPLAY_PATH_SNAPSHOT="true"
(Show full path snapshot or only name, weird reaction with snapper)
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GRUB_BTRFS_TITLE_FORMAT="p/d/n"
(Custom title, shows/hides p"prefix" d"date" n"name" in grub-menu, separator "/", custom order available)
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GRUB_BTRFS_NKERNEL=("vmlinuz-linux")
(Use only if you have a custom kernel name or auto-detect failed.)
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GRUB_BTRFS_NINIT=("initramfs-linux.img" "initramfs-linux-fallback.img")
(Use only if you have a custom initramfs name or auto-detect failed.)
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GRUB_BTRFS_INTEL_UCODE=("intel-ucode.img")
(Use only if you have custom intel-ucode or auto-detect failed.)
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GRUB_BTRFS_LIMIT="100"
(Limit the number of snapshots populated in the GRUB menu.)
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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.)
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GRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="true"
(Show snapshots found during run "grub-mkconfig")
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GRUB_BTRFS_SHOW_TOTAL_SNAPSHOTS_FOUND="true"
(Show Total number of snapshots found during run "grub-mkconfig")
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GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("var/lib/docker" "nosnapshot")
(Ignore specific path during run "grub-mkconfig")
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GRUB_BTRFS_CREATE_ONLY_HARMONIZED_ENTRIES="false"
(Create entries with matching version number instead of all possible combinations of kernel and initramfs, very useful with debian-like distributions)
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 )
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.
Pour les francophones : https://forums.archlinux.fr/viewtopic.php?f=18&t=17177