nix/disko/default.nix
Daniel Flanagan a7ec834c6a
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2024-09-12 11:58:24 -05:00

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Nix

{lib, ...}: let
inherit (lib.attrsets) mapAttrs' filterAttrs;
in {
standardWithHibernateSwap = {
disks ? ["/dev/sda"],
swapSize,
...
}: {
/*
this is my standard partitioning scheme for my machines which probably want hibernation capabilities
a UEFI-compatible boot partition
it includes an LUKS-encrypted btrfs volume
a swap partition big enough to dump all the machine's RAM into
*/
disko.devices = {
disk = {
primary = {
type = "disk";
device = builtins.elemAt disks 0;
content = {
type = "gpt";
partitions = {
ESP = {
label = "EFI";
name = "ESP";
size = "4G";
type = "EF00";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
mountOptions = [
"defaults"
];
};
};
swap = {
size = swapSize;
content = {
type = "swap";
discardPolicy = "both";
resumeDevice = true; # resume from hiberation from this device
};
};
luks = {
size = "100%";
content = {
type = "luks";
name = "crypted";
extraOpenArgs = ["--allow-discards"];
# if you want to use the key for interactive login be sure there is no trailing newline
# for example use `echo -n "password" > /tmp/secret.key`
keyFile = "/tmp/secret.key"; # Interactive
# settings.keyFile = "/tmp/password.key";
# additionalKeyFiles = ["/tmp/additionalSecret.key"];
content = {
type = "btrfs";
extraArgs = ["-f"];
subvolumes = {
"/nixos" = {
mountpoint = "/";
mountOptions = ["compress=zstd" "noatime"];
};
"/home" = {
mountpoint = "/home";
mountOptions = ["compress=zstd" "noatime"];
};
"/nix" = {
mountpoint = "/nix";
mountOptions = ["compress=zstd" "noatime"];
};
};
};
};
};
};
};
};
};
};
};
standard = {disks ? ["/dev/vda"], ...}: {
# this is my standard partitioning scheme for my machines: an LUKS-encrypted
# btrfs volume
disko.devices = {
disk = {
primary = {
type = "disk";
device = builtins.elemAt disks 0;
content = {
type = "gpt";
partitions = {
ESP = {
label = "EFI";
name = "ESP";
size = "512M";
type = "EF00";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
mountOptions = [
"defaults"
];
};
};
luks = {
size = "100%";
content = {
type = "luks";
name = "crypted";
extraOpenArgs = ["--allow-discards"];
# if you want to use the key for interactive login be sure there is no trailing newline
# for example use `echo -n "password" > /tmp/secret.key`
keyFile = "/tmp/secret.key"; # Interactive
# settings.keyFile = "/tmp/password.key";
# additionalKeyFiles = ["/tmp/additionalSecret.key"];
content = {
type = "btrfs";
extraArgs = ["-f"];
subvolumes = {
"/root" = {
mountpoint = "/";
mountOptions = ["compress=zstd" "noatime"];
};
"/home" = {
mountpoint = "/home";
mountOptions = ["compress=zstd" "noatime"];
};
"/nix" = {
mountpoint = "/nix";
mountOptions = ["compress=zstd" "noatime"];
};
};
};
};
};
};
};
};
};
};
};
unencrypted = {disks ? ["/dev/vda"], ...}: {
disko.devices = {
disk = {
primary = {
type = "disk";
device = builtins.elemAt disks 0;
content = {
type = "gpt";
partitions = {
ESP = {
label = "EFI";
name = "ESP";
size = "512M";
type = "EF00";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
mountOptions = [
"defaults"
];
};
};
root = {
size = "100%";
content = {
type = "btrfs";
extraArgs = ["-f"];
subvolumes = {
"/root" = {
mountpoint = "/";
mountOptions = [];
};
"/home" = {
mountpoint = "/home";
mountOptions = ["compress=zstd"];
};
"/nix" = {
mountpoint = "/nix";
mountOptions = ["compress=zstd" "noatime"];
};
};
};
};
};
};
};
};
};
};
beefcake = let
zpools = {
zroot = {
/*
TODO: at the time of writing, disko does not support draid6
so I'm building/managing the array manually for the time being
the root pool is just a single disk right now
*/
name = "zroot";
config = {
type = "zpool";
# mode = "draid6";
rootFsOptions = {
compression = "zstd";
"com.sun:auto-snapshot" = "false";
};
mountpoint = "/";
postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zroot@blank$' || zfs snapshot zroot@blank";
datasets = {
zfs_fs = {
type = "zfs_fs";
mountpoint = "/zfs_fs";
options."com.sun:auto-snapshot" = "true";
};
zfs_unmounted_fs = {
type = "zfs_fs";
options.mountpoint = "none";
};
zfs_legacy_fs = {
type = "zfs_fs";
options.mountpoint = "legacy";
mountpoint = "/zfs_legacy_fs";
};
zfs_testvolume = {
type = "zfs_volume";
size = "10M";
content = {
type = "filesystem";
format = "ext4";
mountpoint = "/ext4onzfs";
};
};
encrypted = {
type = "zfs_fs";
options = {
mountpoint = "none";
encryption = "aes-256-gcm";
keyformat = "passphrase";
keylocation = "file:///tmp/secret.key";
};
# use this to read the key during boot
/*
postCreateHook = ''
zfs set keylocation="prompt" "zroot/$name";
'';
*/
};
"encrypted/test" = {
type = "zfs_fs";
mountpoint = "/zfs_crypted";
};
};
};
};
zstorage = {
/*
PARITY_COUNT=3 NUM_DRIVES=8 HOT_SPARES=2 sudo -E zpool create -f -O mountpoint=none -O compression=on -O xattr=sa -O acltype=posixacl -o ashift=12 -O atime=off -O recordsize=64K zstorage draid{$PARITY_COUNT}:{$NUM_DRIVES}c:{$HOT_SPARES}s /dev/disk/by-id/scsi-35000039548cb637c /dev/disk/by-id/scsi-35000039548cb7c8c /dev/disk/by-id/scsi-35000039548cb85c8 /dev/disk/by-id/scsi-35000039548d9b504 /dev/disk/by-id/scsi-35000039548da2b08 /dev/disk/by-id/scsi-35000039548dad2fc /dev/disk/by-id/scsi-350000399384be921 /dev/disk/by-id/scsi-35000039548db096c
sudo zfs create -o mountpoint=legacy zstorage/nix
sudo zfs create -o canmount=on -o mountpoint=/storage zstorage/storage
*/
name = "zstorage";
config = {};
};
};
diskClass = {
storage = {
type = "zfs";
pool = zpools.zroot.name;
};
boot = {
content = {
type = "gpt";
partitions = {
ESP = {
size = "1G";
type = "EF00";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
};
};
zfs = {
size = "100%";
content = {
type = "zfs";
pool = zpools.zroot.name;
};
};
};
};
};
};
bootDisks = {
"/dev/sdi" = {
name = "i";
enable = true;
};
"/dev/sdj" = {
name = "j";
enable = true;
}; # TODO: join current boot drive to new boot pool
};
storageDisks = {
"/dev/sda" = {
enable = true;
name = "a";
};
"/dev/sdb" = {
enable = true;
name = "b";
};
"/dev/sdc" = {
enable = true;
name = "c";
};
"/dev/sdd" = {
enable = true;
name = "d";
};
# TODO: start small
"/dev/sde" = {
enable = false;
name = "e";
};
"/dev/sdf" = {
enable = false;
name = "f";
};
"/dev/sdg" = {
enable = false;
name = "g";
};
"/dev/sdh" = {
enable = false;
name = "h";
};
# gap for two boot drives
"/dev/sdk" = {
enable = false;
name = "k";
};
"/dev/sdl" = {
enable = false;
name = "l";
};
"/dev/sdm" = {
enable = false;
name = "m";
};
"/dev/sdn" = {
# TODO: this is my holding cell for random stuff right now
enable = false;
name = "n";
};
};
diskoBoot = mapAttrs' (device: {name, ...}: {
name = "boot-${name}";
value = {
inherit device;
type = "disk";
content = diskClass.boot.content;
};
}) (filterAttrs (_: {enable, ...}: enable) bootDisks);
diskoStorage = mapAttrs' (device: {name, ...}: {
name = "storage-${name}";
value = {
inherit device;
type = "disk";
content = diskClass.storage.content;
};
}) (filterAttrs (_: {enable, ...}: enable) storageDisks);
in {
disko.devices = {
disk = diskoBoot // diskoStorage;
zpool = {
zroot = zpools.zroot.config;
};
};
};
legacy = {disks ? ["/dev/vda"], ...}: {
disko.devices = {
disk = {
primary = {
device = builtins.elemAt disks 0;
type = "disk";
content = {
type = "table";
format = "gpt";
partitions = [
{
label = "EFI";
name = "ESP";
size = "512M";
bootable = true;
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
};
}
{
name = "root";
start = "500M";
end = "100%";
part-type = "primary";
bootable = true;
content = {
type = "filesystem";
format = "ext4";
mountpoint = "/";
};
}
];
};
};
};
};
};
}