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grub-btrfs: add custom kernel parameters option for snapshots

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Fix #214, #160

Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>
This commit is contained in:
Pascal Jäger
2022-12-05 21:18:56 +01:00
parent f0ed56d242
commit 934ab213b0
5 changed files with 40 additions and 8 deletions
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8
initramfs/readme.md
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@@ -39,7 +39,11 @@ You notice that the name of the `hook` must match the name of the 2 installed fi
Re-generate your initramfs
`mkinitcpio -P` (option -P means, all preset present in `/etc/mkinitcpio.d`)
#### Dracut based distros
Distributions that use Dracut to make their initramfs (many of the Fedora based Distros) simply have to pass either `rd.live.overlay.readonly=1` (to boot into the snapshot read only) or `rd.live.overlay.overlayfs=1` (to act like a livedisk, that is files can be changed but changes will be lost on the next boot) to their kernel command line in grub.
Grub-btrfs provides the variable `GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS` to add any command to the kernel command line. Set it to `GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS="rd.live.overlay.overlayfs=1"` to make snapshots immutable when booted into.
After changing this run `sudo /etc/grub.d/41_snapshots-btrfs` to generate a new snapshot-submenu with the parameter added.
#### Other distribution
Refer to your distribution's documentation
or contribute to this project to add a paragraph.
Refer to your distribution's documentation or contribute to this project to add a paragraph.
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