# Set variables

```sh
disk=...
zfs_pool=...
swap_ratio=1.5
```

# Partition disk

```sh
parted -s "$disk" mklabel gpt
```

## boot

### MBR

We don't do MBR anymore!

### EFI

```sh
parted -a optimal "$disk" mkpart primary fat32 1MiB 1001MiB
parted "$disk" set 1 esp on

mkfs.vfat -F32 "${disk}1"
```

## swap

```sh
swap_end=$(awk '/MemTotal/ { print int($2 / 1000 * '"$swap_ratio"') + 1001 }' /proc/meminfo)
parted -a optimal "$disk" mkpart primary linux-swap 1001MiB "$swap_end"

mkswap "${disk}2"
swapon "${disk}2"
```

## zpool

```sh
parted -a optimal "$disk" mkpart primary "$swap_end" 100%

zpool create \
    -O mountpoint=none \
    -O encryption=on \
    -O keyformat=passphrase \
    -O keylocation=prompt \
    -O acltype=posixacl \
    -O xattr=sa \
    -O compression=zstd \
    -O dnodesize=auto \
    -O normalization=formD \
    -o ashift=12 \
    -o autotrim=on \
    -R /mnt \
    "$zfs_pool" "${disk}3"
```

### zfs volumes

```sh
zfs create -o mountpoint=none   "$zfs_pool/rootfs"
zfs create -o mountpoint=legacy "$zfs_pool/rootfs/nixos"
zfs create -o mountpoint=legacy "$zfs_pool/homefs"
zfs create -o mountpoint=legacy "$zfs_pool/homefs/root"
zfs create -o mountpoint=legacy "$zfs_pool/homefs/tyil"
```

# Mount partitions/volumes

```sh
mount -t zfs "$zfs_pool/rootfs/nixos" /mnt

mkdir -pv -- /mnt/boot
mount -t vfat "${disk}1" /mnt/boot

mkdir -pv -- /mnt/home
mount -t zfs "$zfs_pool/homefs" /mnt/home

mkdir -pv -- /mnt/root
mkdir -pv -- /mnt/home/tyil
mount -t zfs "$zfs_pool/homefs/root" /mnt/root
mount -t zfs "$zfs_pool/homefs/tyil" /mnt/home/tyil
```

# Install NixOS

## Configure

```sh
nixos-generate-config --root /mnt
```

Apply configs in `/mnt/etc/nixos`

```nix
{
    boot.supportedFilesystems = [ "zfs" ];
    boot.zfs.devNodes = ...
    boot.zfs.forceImportRoot = false;
    networking.hostId   = $(head -c4 /dev/urandom | od -A none -t x4)
    networking.hostName = ...
}
```

## Install

```sh
cd /mnt && nixos-install
```

## Reboot

```sh
umount -lR /mnt
zpool export "$zfs_pool"
```