dotfiles/utilities/nixos-installers/install_bcachefs.md

Install nix minimal with bcachefs filesystem

• optional encryption
• optional auto unlock with USB key
• custom iso installer
  • nix build .\#packages.x86_64-linux.iso-minimal-stable

Format main drive with boot partition

Partition with GPT

DEVICE=sda
parted /dev/$DEVICE -- mklabel gpt
parted /dev/$DEVICE -- mkpart ESP fat32 1MB 2GB
parted /dev/$DEVICE -- set 1 esp on
# TODO make swap partition instead here? Bcachefs not working with swapfile
parted /dev/$DEVICE -- mkpart PRIMARY 2GB 100%

Format partitions

• boot

BOOT=sda1
mkfs.fat -F 32 -n BOOT /dev/$BOOT

• primary

PRIMARY=sda2
keyctl link @u @s
bcachefs format --label=nixos --encrypted /dev/$PRIMARY
bcachefs unlock /dev/$PRIMARY

Setup subvolumes

# keyctl link @u @s
# TODO check this is it 7 or 8 for print?
U=$(lsblk -o fsType,uuid | grep bcachefs | awk '{print $2}')
echo $U
mount /dev/disk/by-uuid/$U /mnt

bcachefs subvolume create /mnt/@root
bcachefs subvolume create /mnt/@nix
bcachefs set-file-option /mnt/@nix --compression=zstd
bcachefs subvolume create /mnt/@snapshots
bcachefs set-file-option /mnt/@snapshots --compression=zstd
bcachefs subvolume create /mnt/@swap
bcachefs set-file-option /mnt/@swap --nocow
bcachefs subvolume create /mnt/@persist

umount /mnt

Tip getfattr -d -m '^bcachefs\.' filename

Note: Format any additional drives if you need to

Mount subvolumes

DEV_B="/dev/disk/by-uuid/"$(lsblk -o NAME,UUID | grep $BOOT | awk '{print $2}')
DEV_P="/dev/disk/by-uuid/"$(lsblk -o NAME,UUID | grep $PRIMARY | awk '{print $2}')
mount -t bcachefs -o X-mount.subdir=@root $DEV_P /mnt
mount -t vfat $DEV_B /mnt/boot --mkdir
mount -t bcachefs -o X-mount.mkdir,X-mount.subdir=@nix,relatime $DEV_P /mnt/nix
mount -t bcachefs -o X-mount.mkdir,X-mount.subdir=@snapshots,relatime $DEV_P /mnt/.snapshots
mount -t bcachefs -o X-mount.mkdir,X-mount.subdir=@swap,noatime $DEV_P /mnt/.swap
mount -t bcachefs -o X-mount.mkdir,X-mount.subdir=@persist $DEV_P /mnt/persist

Generate hardware config

nixos-generate-config --root /mnt

• Copy useful bits out into real config in repo
• Run nixos-install

nixos-install --flake "git+https://git.joshuabell.xyz/ringofstorms/dotfiles?dir=hosts/i001#i001"
# nh os switch "git+https://git.joshuabell.xyz/ringofstorms/dotfiles?dir=hosts/i001#i001"

or from host machine? TODO haven't tried this fully

NIX_SSHOPTS="-i /run/agenix/nix2nix" sudo nixos-rebuild switch --flake "git+https://git.joshuabell.xyz/ringofstorms/dotfiles?dir=hosts/i001#i001" --target-host luser@10.12.14.157 --build-host localhost