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|
{
config,
lib,
pkgs,
...
}: let
cfg = config.soispha.disks;
defaultMountOptions = [
"compress-force=zstd:15" # This saves disk space, at a performance cost
"noatime" # should have some performance upsides, and I don't use it anyways
"lazytime" # make time changes in memory
];
in {
options.soispha.disks = {
disk = lib.mkOption {
type = lib.types.path;
example = lib.literalExpression "/dev/disk/by-uuid/0442cb6d-f13a-4635-b487-fa76189774c5";
description = lib.mdDoc "The disk used for installing the OS";
};
ssd = lib.mkOption {
type = lib.types.bool;
example = lib.literalExpression "true";
default = false;
description = lib.mdDoc "Enable ssd specific improvements, like trim";
};
swap = {
uuid = lib.mkOption {
type = lib.types.str;
example = lib.literalExpression "d1d20ae7-3d8a-44da-86da-677dbbb10c89";
description = lib.mdDoc "The uuid of the swapfile";
};
resumeOffset = lib.mkOption {
type = lib.types.str;
example = lib.literalExpression "134324224";
description = lib.mdDoc "The resume offset of the swapfile";
};
};
};
config = {
systemd = lib.recursiveUpdate (import ./hibernate.nix {inherit pkgs;}) (import ./fstrim.nix {inherit pkgs lib cfg;});
disko.devices = {
disk = {
main = {
device = cfg.disk;
content = {
type = "gpt";
partitions = {
root = {
size = "100%";
name = "root";
content = {
type = "luks";
name = "nixos";
extraOpenArgs = ["--allow-discards"];
content = {
type = "btrfs";
extraArgs = ["-f" "--label nixos"]; # Override existing partitions
subvolumes = {
"nix" = {
mountpoint = "/nix";
mountOptions = defaultMountOptions;
};
"persistent-storage" = {
mountpoint = "/srv";
mountOptions = defaultMountOptions;
};
"persistent-storage@snapshots" = {
mountpoint = "/srv/.snapshots";
mountOptions = defaultMountOptions;
};
"swap" = {
mountpoint = "/swap";
mountOptions = defaultMountOptions;
};
};
};
};
};
boot = {
type = "EF00";
size = "512M";
name = "boot";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
};
};
};
};
};
};
nodev = {
"/" = {
fsType = "tmpfs";
mountOptions = ["defaults" "size=4G" "mode=755"];
};
};
};
fileSystems = {
"/srv" = {
neededForBoot = true;
};
"/swap" = {
neededForBoot = true;
};
};
swapDevices = [
{
device = "/swap/swapfile";
priority = 1; # lower than zramSwap, just in case
# size = 2048; # TODO can nixos create a btrfs swapfile correctly?
}
];
zramSwap = {
enable = true;
priority = 10; # needs to be higher than hardware-swap
};
boot.kernelParams = [
"resume=UUID=${cfg.swap.uuid}"
"resume_offset=${cfg.swap.resumeOffset}"
"zswap.enabled=0" # zswap and zram are not really compatible
];
};
}
# vim: ts=2
|
