267 lines
8.4 KiB
Nix
267 lines
8.4 KiB
Nix
{
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lib,
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pkgs,
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config,
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inputs,
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...
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}: let
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# there currently is a bug with disko that causes long disk names to be generated improperly this hash function should alleviate it when used for disk names instead of what we are defaulting to
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# max gpt length is 36 and disk adds formats it like disk-xxxx-zfs which means we need to be 9 characters under that
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hashDisk = drive: (builtins.substring 0 27 (builtins.hashString "sha256" drive));
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vdevs =
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builtins.map (
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disks:
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builtins.map (disk: lib.attrsets.nameValuePair (hashDisk disk) disk) disks
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)
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config.host.storage.pool.vdevs;
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cache =
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builtins.map (
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disk: lib.attrsets.nameValuePair (hashDisk disk) disk
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)
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config.host.storage.pool.cache;
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datasets = config.host.storage.pool.datasets // config.host.storage.pool.extraDatasets;
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in {
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options.host.storage = {
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enable = lib.mkEnableOption "are we going create zfs disks with disko on this device";
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encryption = lib.mkEnableOption "is the vdev going to be encrypted";
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notifications = {
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enable = lib.mkEnableOption "are notifications enabled";
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host = lib.mkOption {
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type = lib.types.str;
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description = "what is the host that we are going to send the email to";
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};
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port = lib.mkOption {
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type = lib.types.port;
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description = "what port is the host using to receive mail on";
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};
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to = lib.mkOption {
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type = lib.types.str;
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description = "what account is the email going to be sent to";
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};
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user = lib.mkOption {
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type = lib.types.str;
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description = "what user is the email going to be set from";
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};
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tokenFile = lib.mkOption {
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type = lib.types.str;
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description = "file containing the password to be used by msmtp for notifications";
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};
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};
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pool = {
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mode = lib.mkOption {
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type = lib.types.str;
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default = "raidz2";
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description = "what level of redundancy should this pool have";
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};
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# list of drives in pool that will have a boot partition put onto them
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bootDrives = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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description = "list of disks that are going to have a boot partition installed on them";
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default = lib.lists.flatten config.host.storage.pool.vdevs;
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};
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# shorthand for vdevs if you only have 1 vdev
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drives = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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description = "list of drives that are going to be in the vdev";
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default = [];
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};
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# list of all drives in each vdev
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vdevs = lib.mkOption {
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type = lib.types.listOf (lib.types.listOf lib.types.str);
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description = "list of disks that are going to be in";
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default = [config.host.storage.pool.drives];
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};
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# list of cache drives for pool
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cache = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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description = "list of drives that are going to be used as cache";
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default = [];
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};
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# Default datasets that are needed to make a functioning system
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datasets = lib.mkOption {
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type = lib.types.attrsOf (inputs.disko.lib.subType {
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types = {inherit (inputs.disko.lib.types) zfs_fs zfs_volume;};
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});
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default = {
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"local" = {
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type = "zfs_fs";
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options.canmount = "off";
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};
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# nix directory needs to be available pre persist and doesn't need to be snapshotted or backed up
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"local/system/nix" = {
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type = "zfs_fs";
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mountpoint = "/nix";
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options = {
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atime = "off";
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relatime = "off";
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canmount = "on";
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};
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};
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# dataset for root that gets rolled back on every boot
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"local/system/root" = {
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type = "zfs_fs";
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mountpoint = "/";
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options = {
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canmount = "on";
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};
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postCreateHook = ''
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zfs snapshot rpool/local/system/root@blank
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'';
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};
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};
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};
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extraDatasets = lib.mkOption {
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type = lib.types.attrsOf (inputs.disko.lib.subType {
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types = {inherit (inputs.disko.lib.types) zfs_fs zfs_volume;};
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});
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description = "List of datasets to define";
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default = {};
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};
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};
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};
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config = lib.mkIf config.host.storage.enable {
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programs.msmtp = lib.mkIf config.host.storage.notifications.enable {
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enable = true;
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setSendmail = true;
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defaults = {
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aliases = "/etc/aliases";
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port = config.host.storage.notifications.port;
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tls_trust_file = "/etc/ssl/certs/ca-certificates.crt";
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tls = "on";
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auth = "login";
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tls_starttls = "off";
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};
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accounts = {
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zfs_notifications = {
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auth = true;
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tls = true;
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host = config.host.storage.notifications.host;
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passwordeval = "cat ${config.host.storage.notifications.tokenFile}";
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user = config.host.storage.notifications.user;
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from = config.host.storage.notifications.user;
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};
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};
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};
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services.zfs = {
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autoScrub.enable = true;
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autoSnapshot.enable = true;
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zed = lib.mkIf config.host.storage.notifications.enable {
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enableMail = true;
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settings = {
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ZED_DEBUG_LOG = "/tmp/zed.debug.log";
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ZED_EMAIL_ADDR = [config.host.storage.notifications.to];
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ZED_EMAIL_PROG = "${pkgs.msmtp}/bin/msmtp";
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ZED_EMAIL_OPTS = "-a zfs_notifications @ADDRESS@";
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ZED_NOTIFY_INTERVAL_SECS = 3600;
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ZED_NOTIFY_VERBOSE = true;
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ZED_USE_ENCLOSURE_LEDS = true;
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ZED_SCRUB_AFTER_RESILVER = true;
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};
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};
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};
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disko.devices = {
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disk = (
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builtins.listToAttrs (
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builtins.map
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(drive:
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lib.attrsets.nameValuePair (drive.name) {
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type = "disk";
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device = "/dev/disk/by-id/${drive.value}";
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content = {
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type = "gpt";
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partitions = {
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ESP = lib.mkIf (builtins.elem drive.value config.host.storage.pool.bootDrives) {
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# The 2GB here for the boot partition might be a bit overkill we probably only need like 1/4th of that but storage is cheap
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size = "2G";
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type = "EF00";
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content = {
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type = "filesystem";
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format = "vfat";
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mountpoint = "/boot";
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mountOptions = ["umask=0077"];
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};
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};
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zfs = {
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size = "100%";
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content = {
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type = "zfs";
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pool = "rpool";
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};
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};
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};
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};
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})
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(
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(lib.lists.flatten vdevs) ++ cache
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)
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)
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);
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zpool = {
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rpool = {
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type = "zpool";
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mode = {
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topology = {
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type = "topology";
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vdev = (
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builtins.map (disks: {
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mode = config.host.storage.pool.mode;
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members =
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builtins.map (disk: disk.name) disks;
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})
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vdevs
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);
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cache = builtins.map (disk: disk.name) cache;
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};
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};
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options = {
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ashift = "12";
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autotrim = "on";
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};
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rootFsOptions =
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{
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canmount = "off";
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mountpoint = "none";
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xattr = "sa";
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acltype = "posixacl";
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relatime = "on";
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compression = "lz4";
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"com.sun:auto-snapshot" = "false";
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}
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// (
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lib.attrsets.optionalAttrs config.host.storage.encryption {
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encryption = "on";
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keyformat = "hex";
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keylocation = "prompt";
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}
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);
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datasets = lib.mkMerge [
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(
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lib.attrsets.mapAttrs (name: value: {
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type = value.type;
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options = value.options;
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mountpoint = value.mountpoint;
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postCreateHook = value.postCreateHook;
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})
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datasets
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)
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];
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};
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};
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};
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};
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}
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