mirror of
https://github.com/Antynea/grub-btrfs.git
synced 2026-03-04 13:05:00 +08:00
156 lines
4.7 KiB
Markdown
156 lines
4.7 KiB
Markdown
[](https://github.com/Antynea/grub-btrfs/releases)
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## grub-btrfs
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This is a version 4.xx of grub-btrfs
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##### BTC donation address: `1Lbvz244WA8xbpHek9W2Y12cakM6rDe5Rt`
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##
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### Description
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Improves Grub by adding "btrfs snapshots" to the Grub menu.
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You can start your system on a "snapshot" from the Grub menu.
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Supports manual snapshots, snapper, timeshift ...
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##### Warning: booting on read-only snapshots can be tricky
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If you choose to do it, `/var/log` must be on a separate subvolume.
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Otherwise, make sure your snapshots are writeable.
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See [this ticket](https://github.com/Antynea/grub-btrfs/issues/92) for more info.
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### What does grub-btrfs v4.xx do :
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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.
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* Automatically Create corresponding "menuentry" in `grub.cfg`
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* Automatically detect snapper and use snapper's snapshot description if available.
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* Automatically generate `grub.cfg` if you use the provided systemd service.
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##
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### Installation :
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#### Arch Linux
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```
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pacman -S grub-btrfs
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```
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### Manual
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* Run `make install` or look into Makefile for instructions on where to put each file.
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NOTE: Generate your Grub menu after installation for the changes to take effect.
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On Arch Linux use `grub-mkconfig -o /boot/grub/grub.cfg`.
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##
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### Customization:
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You have the possibility to modify many parameters in `/etc/default/grub-btrfs/config`.
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* GRUB_BTRFS_SUBMENUNAME="Arch Linux Snapshots"
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Name appearing in the Grub menu.
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* GRUB_BTRFS_PREFIXENTRY="Snapshot:"
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Add a name ahead your snapshots entries in the Grub menu.
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* GRUB_BTRFS_DISPLAY_PATH_SNAPSHOT="true"
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Show full path snapshot or only name in the Grub menu, weird reaction with snapper.
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* GRUB_BTRFS_TITLE_FORMAT="p/d/n"
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Custom title, shows/hides p"prefix" d"date" n"name" in the Grub menu, separator "/", custom order available.
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* GRUB_BTRFS_LIMIT="50"
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Limit the number of snapshots populated in the GRUB menu.
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* GRUB_BTRFS_SUBVOLUME_SORT="descending"
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Sort the found subvolumes by newest first ("descending") or oldest first ("ascending").
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If "ascending" is chosen then
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the $GRUB_BTRFS_LIMIT oldest subvolumes will populate the menu.
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* GRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="true"
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Show snapshots found during run "grub-mkconfig".
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* GRUB_BTRFS_SHOW_TOTAL_SNAPSHOTS_FOUND="true"
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Show Total number of snapshots found during run "grub-mkconfig".
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* GRUB_BTRFS_NKERNEL=("kernel-custom")
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Use it only if you have a custom kernel name
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* GRUB_BTRFS_NINIT=("initramfs-custom.img" "initrd.img-custom")
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Use it only if you have a custom initramfs name.
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* GRUB_BTRFS_INTEL_UCODE=("intel-ucode.img")
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Use it only if you have custom intel-ucode.
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* GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("var/lib/docker")
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Ignore specific path during run "grub-mkconfig".
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For example:
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If path is a directory `# Found Snapshot: 2016-03-31 10:24:41` **var/lib/docker/btrfs/subvolumes/...**
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use : `GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("var/lib/docker")`
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If path is a subvolume : `# Found Snapshot: 2016-03-31 10:24:41` **@var/lib/docker/btrfs/subvolumes/...**
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use : `GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@var/lib/docker")`
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You can combine them
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use : `GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@var/lib/docker" "var/lib/docker")`
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* GRUB_BTRFS_SNAPPER_CONFIG="root"
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Snapper's config name to use.
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* GRUB_BTRFS_DISABLE="false"
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Disable grub-btrfs.
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* GRUB_BTRFS_DIRNAME="grub"
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Name of the grub folder in `/boot/`, might be grub2 on some distributions.
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* GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="false"
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Change to "true" if you have a boot partition in a different subvolume.
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* GRUB_BTRFS_MKCONFIG=grub-mkconfig
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Name or path of the 'grub-mkconfig' executable; might be 'grub2-mkconfig' on some distributions.
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##
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### Automatically update grub
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If you would like Grub to automatically update when a snapshot is made or deleted:
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* Mount your subvolume which contains snapshots to `/.snapshots`
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* Use `systemctl start/enable grub-btrfs.path`
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* `grub-btrfs.path` automatically (re)generates `grub.cfg` when a modification appears in `/.snapshots`
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##
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### Special thanks for assistance and contributions
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* [maximbaz](https://github.com/maximbaz)
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* [crossroads1112](https://github.com/crossroads1112)
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* [penetal](https://github.com/penetal)
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* [wesbarnett](https://github.com/wesbarnett)
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* [Psykar](https://github.com/Psykar)
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* [anyc](https://github.com/anyc)
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* [daftaupe](https://github.com/daftaupe)
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* [N-Parsons](https://github.com/N-Parsons)
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##
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