912 lines
33 KiB
Nix
912 lines
33 KiB
Nix
{ config, lib, options, pkgs, utils, ... }:
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#
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# TODO: zfs tunables
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with utils;
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with lib;
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let
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cfgZfs = config.boot.zfs;
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optZfs = options.boot.zfs;
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cfgExpandOnBoot = config.services.zfs.expandOnBoot;
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cfgSnapshots = config.services.zfs.autoSnapshot;
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cfgSnapFlags = cfgSnapshots.flags;
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cfgScrub = config.services.zfs.autoScrub;
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cfgTrim = config.services.zfs.trim;
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cfgZED = config.services.zfs.zed;
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selectModulePackage = package: config.boot.kernelPackages.${package.kernelModuleAttribute};
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clevisDatasets = attrNames (filterAttrs (device: _: any (e: e.fsType == "zfs" && (fsNeededForBoot e) && (e.device == device || hasPrefix "${device}/" e.device)) config.system.build.fileSystems) config.boot.initrd.clevis.devices);
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inInitrd = config.boot.initrd.supportedFilesystems.zfs or false;
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inSystem = config.boot.supportedFilesystems.zfs or false;
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autosnapPkg = pkgs.zfstools.override {
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zfs = cfgZfs.package;
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};
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zfsAutoSnap = "${autosnapPkg}/bin/zfs-auto-snapshot";
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datasetToPool = x: elemAt (splitString "/" x) 0;
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fsToPool = fs: datasetToPool fs.device;
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zfsFilesystems = filter (x: x.fsType == "zfs") config.system.build.fileSystems;
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allPools = unique ((map fsToPool zfsFilesystems) ++ cfgZfs.extraPools);
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rootPools = unique (map fsToPool (filter fsNeededForBoot zfsFilesystems));
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dataPools = unique (filter (pool: !(elem pool rootPools)) allPools);
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snapshotNames = [ "frequent" "hourly" "daily" "weekly" "monthly" ];
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# When importing ZFS pools, there's one difficulty: These scripts may run
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# before the backing devices (physical HDDs, etc.) of the pool have been
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# scanned and initialized.
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#
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# An attempted import with all devices missing will just fail, and can be
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# retried, but an import where e.g. two out of three disks in a three-way
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# mirror are missing, will succeed. This is a problem: When the missing disks
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# are later discovered, they won't be automatically set online, rendering the
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# pool redundancy-less (and far slower) until such time as the system reboots.
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#
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# The solution is the below. poolReady checks the status of an un-imported
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# pool, to see if *every* device is available -- in which case the pool will be
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# in state ONLINE, as opposed to DEGRADED, FAULTED or MISSING.
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#
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# The import scripts then loop over this, waiting until the pool is ready or a
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# sufficient amount of time has passed that we can assume it won't be. In the
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# latter case it makes one last attempt at importing, allowing the system to
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# (eventually) boot even with a degraded pool.
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importLib = {zpoolCmd, awkCmd, cfgZfs}: ''
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for o in $(cat /proc/cmdline); do
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case $o in
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zfs_force|zfs_force=1|zfs_force=y)
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ZFS_FORCE="-f"
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;;
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esac
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done
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poolReady() {
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pool="$1"
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state="$("${zpoolCmd}" import -d "${cfgZfs.devNodes}" 2>/dev/null | "${awkCmd}" "/pool: $pool/ { found = 1 }; /state:/ { if (found == 1) { print \$2; exit } }; END { if (found == 0) { print \"MISSING\" } }")"
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if [[ "$state" = "ONLINE" ]]; then
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return 0
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else
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echo "Pool $pool in state $state, waiting"
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return 1
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fi
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}
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poolImported() {
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pool="$1"
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"${zpoolCmd}" list "$pool" >/dev/null 2>/dev/null
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}
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poolImport() {
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pool="$1"
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"${zpoolCmd}" import -d "${cfgZfs.devNodes}" -N $ZFS_FORCE "$pool"
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}
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'';
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getPoolFilesystems = pool:
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filter (x: x.fsType == "zfs" && (fsToPool x) == pool) config.system.build.fileSystems;
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getPoolMounts = prefix: pool:
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let
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poolFSes = getPoolFilesystems pool;
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# Remove the "/" suffix because even though most mountpoints
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# won't have it, the "/" mountpoint will, and we can't have the
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# trailing slash in "/sysroot/" in stage 1.
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mountPoint = fs: escapeSystemdPath (prefix + (lib.removeSuffix "/" fs.mountPoint));
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hasUsr = lib.any (fs: fs.mountPoint == "/usr") poolFSes;
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in
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map (x: "${mountPoint x}.mount") poolFSes
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++ lib.optional hasUsr "sysusr-usr.mount";
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getKeyLocations = pool: if isBool cfgZfs.requestEncryptionCredentials then {
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hasKeys = cfgZfs.requestEncryptionCredentials;
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command = "${cfgZfs.package}/sbin/zfs list -rHo name,keylocation,keystatus -t volume,filesystem ${pool}";
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} else let
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keys = filter (x: datasetToPool x == pool) cfgZfs.requestEncryptionCredentials;
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in {
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hasKeys = keys != [];
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command = "${cfgZfs.package}/sbin/zfs list -Ho name,keylocation,keystatus -t volume,filesystem ${toString keys}";
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};
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createImportService = { pool, systemd, force, prefix ? "" }:
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nameValuePair "zfs-import-${pool}" {
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description = "Import ZFS pool \"${pool}\"";
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# We wait for systemd-udev-settle to ensure devices are available,
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# but don't *require* it, because mounts shouldn't be killed if it's stopped.
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# In the future, hopefully someone will complete this:
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# https://github.com/zfsonlinux/zfs/pull/4943
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wants = [ "systemd-udev-settle.service" ] ++ optional (config.boot.initrd.clevis.useTang) "network-online.target";
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after = [
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"systemd-udev-settle.service"
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"systemd-modules-load.service"
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"systemd-ask-password-console.service"
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] ++ optional (config.boot.initrd.clevis.useTang) "network-online.target";
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requiredBy = getPoolMounts prefix pool ++ [ "zfs-import.target" ];
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before = getPoolMounts prefix pool ++ [ "shutdown.target" "zfs-import.target" ];
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conflicts = [ "shutdown.target" ];
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unitConfig = {
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DefaultDependencies = "no";
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};
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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environment.ZFS_FORCE = optionalString force "-f";
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script = let
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keyLocations = getKeyLocations pool;
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in (importLib {
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# See comments at importLib definition.
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zpoolCmd = "${cfgZfs.package}/sbin/zpool";
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awkCmd = "${pkgs.gawk}/bin/awk";
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inherit cfgZfs;
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}) + ''
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if ! poolImported "${pool}"; then
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echo -n "importing ZFS pool \"${pool}\"..."
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# Loop across the import until it succeeds, because the devices needed may not be discovered yet.
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for trial in `seq 1 60`; do
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poolReady "${pool}" && poolImport "${pool}" && break
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sleep 1
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done
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poolImported "${pool}" || poolImport "${pool}" # Try one last time, e.g. to import a degraded pool.
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fi
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if poolImported "${pool}"; then
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${optionalString config.boot.initrd.clevis.enable (concatMapStringsSep "\n" (elem: "clevis decrypt < /etc/clevis/${elem}.jwe | zfs load-key ${elem} || true ") (filter (p: (elemAt (splitString "/" p) 0) == pool) clevisDatasets))}
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${optionalString keyLocations.hasKeys ''
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${keyLocations.command} | while IFS=$'\t' read ds kl ks; do
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{
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if [[ "$ks" != unavailable ]]; then
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continue
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fi
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case "$kl" in
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none )
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;;
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prompt )
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tries=3
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success=false
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while [[ $success != true ]] && [[ $tries -gt 0 ]]; do
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${systemd}/bin/systemd-ask-password --timeout=${toString cfgZfs.passwordTimeout} "Enter key for $ds:" | ${cfgZfs.package}/sbin/zfs load-key "$ds" \
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&& success=true \
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|| tries=$((tries - 1))
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done
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[[ $success = true ]]
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;;
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* )
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${cfgZfs.package}/sbin/zfs load-key "$ds"
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;;
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esac
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} < /dev/null # To protect while read ds kl in case anything reads stdin
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done
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''}
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echo "Successfully imported ${pool}"
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else
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exit 1
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fi
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'';
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};
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zedConf = generators.toKeyValue {
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mkKeyValue = generators.mkKeyValueDefault {
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mkValueString = v:
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if isInt v then toString v
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else if isString v then "\"${v}\""
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else if true == v then "1"
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else if false == v then "0"
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else if isList v then "\"" + (concatStringsSep " " v) + "\""
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else err "this value is" (toString v);
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} "=";
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} cfgZED.settings;
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in
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{
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imports = [
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(mkRemovedOptionModule [ "boot" "zfs" "enableLegacyCrypto" ] "The corresponding package was removed from nixpkgs.")
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(mkRemovedOptionModule [ "boot" "zfs" "enableUnstable" ] "Instead set `boot.zfs.package = pkgs.zfs_unstable;`")
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];
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###### interface
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options = {
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boot.zfs = {
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package = mkOption {
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type = types.package;
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default = pkgs.zfs;
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defaultText = literalExpression "pkgs.zfs";
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description = "Configured ZFS userland tools package, use `pkgs.zfs_unstable` if you want to track the latest staging ZFS branch.";
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};
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modulePackage = mkOption {
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internal = true; # It is supposed to be selected automatically, but can be overridden by expert users.
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default = selectModulePackage cfgZfs.package;
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type = types.package;
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description = "Configured ZFS kernel module package.";
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};
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enabled = mkOption {
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readOnly = true;
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type = types.bool;
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default = inInitrd || inSystem;
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defaultText = literalMD "`true` if ZFS filesystem support is enabled";
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description = "True if ZFS filesystem support is enabled";
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};
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allowHibernation = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Allow hibernation support, this may be a unsafe option depending on your
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setup. Make sure to NOT use Swap on ZFS.
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'';
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};
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extraPools = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "tank" "data" ];
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description = ''
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Name or GUID of extra ZFS pools that you wish to import during boot.
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Usually this is not necessary. Instead, you should set the mountpoint property
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of ZFS filesystems to `legacy` and add the ZFS filesystems to
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NixOS's {option}`fileSystems` option, which makes NixOS automatically
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import the associated pool.
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However, in some cases (e.g. if you have many filesystems) it may be preferable
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to exclusively use ZFS commands to manage filesystems. If so, since NixOS/systemd
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will not be managing those filesystems, you will need to specify the ZFS pool here
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so that NixOS automatically imports it on every boot.
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'';
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};
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devNodes = mkOption {
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type = types.path;
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default = "/dev/disk/by-id";
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description = ''
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Name of directory from which to import ZFS devices.
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This should be a path under /dev containing stable names for all devices needed, as
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import may fail if device nodes are renamed concurrently with a device failing.
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'';
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};
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forceImportRoot = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Forcibly import the ZFS root pool(s) during early boot.
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This is enabled by default for backwards compatibility purposes, but it is highly
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recommended to disable this option, as it bypasses some of the safeguards ZFS uses
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to protect your ZFS pools.
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If you set this option to `false` and NixOS subsequently fails to
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boot because it cannot import the root pool, you should boot with the
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`zfs_force=1` option as a kernel parameter (e.g. by manually
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editing the kernel params in grub during boot). You should only need to do this
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once.
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'';
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};
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forceImportAll = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Forcibly import all ZFS pool(s).
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If you set this option to `false` and NixOS subsequently fails to
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import your non-root ZFS pool(s), you should manually import each pool with
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"zpool import -f \<pool-name\>", and then reboot. You should only need to do
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this once.
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'';
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};
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requestEncryptionCredentials = mkOption {
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type = types.either types.bool (types.listOf types.str);
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default = true;
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example = [ "tank" "data" ];
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description = ''
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If true on import encryption keys or passwords for all encrypted datasets
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are requested. To only decrypt selected datasets supply a list of dataset
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names instead. For root pools the encryption key can be supplied via both
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an interactive prompt (keylocation=prompt) and from a file (keylocation=file://).
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'';
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};
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passwordTimeout = mkOption {
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type = types.int;
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default = 0;
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description = ''
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Timeout in seconds to wait for password entry for decrypt at boot.
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Defaults to 0, which waits forever.
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'';
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};
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removeLinuxDRM = lib.mkOption {
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type = types.bool;
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default = false;
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description = ''
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Patch the kernel to change symbols needed by ZFS from
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EXPORT_SYMBOL_GPL to EXPORT_SYMBOL.
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Currently has no effect, but may again in future if a kernel
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update breaks ZFS due to symbols being newly changed to GPL.
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'';
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};
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};
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services.zfs.autoSnapshot = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable the (OpenSolaris-compatible) ZFS auto-snapshotting service.
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Note that you must set the `com.sun:auto-snapshot`
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property to `true` on all datasets which you wish
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to auto-snapshot.
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You can override a child dataset to use, or not use auto-snapshotting
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by setting its flag with the given interval:
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`zfs set com.sun:auto-snapshot:weekly=false DATASET`
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'';
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};
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flags = mkOption {
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default = "-k -p";
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example = "-k -p --utc";
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type = types.str;
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description = ''
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Flags to pass to the zfs-auto-snapshot command.
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Run `zfs-auto-snapshot` (without any arguments) to
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see available flags.
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If it's not too inconvenient for snapshots to have timestamps in UTC,
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it is suggested that you append `--utc` to the list
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of default options (see example).
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Otherwise, snapshot names can cause name conflicts or apparent time
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reversals due to daylight savings, timezone or other date/time changes.
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'';
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};
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frequent = mkOption {
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default = 4;
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type = types.int;
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description = ''
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Number of frequent (15-minute) auto-snapshots that you wish to keep.
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'';
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};
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hourly = mkOption {
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default = 24;
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type = types.int;
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description = ''
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Number of hourly auto-snapshots that you wish to keep.
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'';
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};
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daily = mkOption {
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default = 7;
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type = types.int;
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description = ''
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Number of daily auto-snapshots that you wish to keep.
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'';
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};
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weekly = mkOption {
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default = 4;
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type = types.int;
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description = ''
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Number of weekly auto-snapshots that you wish to keep.
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'';
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};
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monthly = mkOption {
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default = 12;
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type = types.int;
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description = ''
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Number of monthly auto-snapshots that you wish to keep.
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'';
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};
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};
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services.zfs.trim = {
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enable = mkOption {
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description = "Whether to enable periodic TRIM on all ZFS pools.";
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default = true;
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example = false;
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type = types.bool;
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};
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interval = mkOption {
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default = "weekly";
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type = types.str;
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example = "daily";
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description = ''
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How often we run trim. For most desktop and server systems
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a sufficient trimming frequency is once a week.
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The format is described in
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{manpage}`systemd.time(7)`.
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'';
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};
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randomizedDelaySec = mkOption {
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default = "6h";
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type = types.str;
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example = "12h";
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description = ''
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Add a randomized delay before each ZFS trim.
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The delay will be chosen between zero and this value.
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This value must be a time span in the format specified by
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{manpage}`systemd.time(7)`
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'';
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};
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};
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services.zfs.autoScrub = {
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enable = mkEnableOption "periodic scrubbing of ZFS pools";
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interval = mkOption {
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default = "monthly";
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type = types.str;
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example = "quarterly";
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description = ''
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Systemd calendar expression when to scrub ZFS pools. See
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{manpage}`systemd.time(7)`.
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'';
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};
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randomizedDelaySec = mkOption {
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default = "6h";
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type = types.str;
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example = "12h";
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description = ''
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Add a randomized delay before each ZFS autoscrub.
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The delay will be chosen between zero and this value.
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This value must be a time span in the format specified by
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{manpage}`systemd.time(7)`
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'';
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};
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pools = mkOption {
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default = [];
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type = types.listOf types.str;
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example = [ "tank" ];
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description = ''
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List of ZFS pools to periodically scrub. If empty, all pools
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will be scrubbed.
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'';
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};
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};
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services.zfs.expandOnBoot = mkOption {
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type = types.either (types.enum [ "disabled" "all" ]) (types.listOf types.str);
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default = "disabled";
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example = [ "tank" "dozer" ];
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description = ''
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After importing, expand each device in the specified pools.
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Set the value to the plain string "all" to expand all pools on boot:
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services.zfs.expandOnBoot = "all";
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or set the value to a list of pools to expand the disks of specific pools:
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services.zfs.expandOnBoot = [ "tank" "dozer" ];
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'';
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};
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services.zfs.zed = {
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||
enableMail = mkOption {
|
||
type = types.bool;
|
||
default = config.services.mail.sendmailSetuidWrapper != null;
|
||
defaultText = literalExpression ''
|
||
config.services.mail.sendmailSetuidWrapper != null
|
||
'';
|
||
description = ''
|
||
Whether to enable ZED's ability to send emails.
|
||
'';
|
||
};
|
||
|
||
settings = mkOption {
|
||
type = with types; attrsOf (oneOf [ str int bool (listOf str) ]);
|
||
example = literalExpression ''
|
||
{
|
||
ZED_DEBUG_LOG = "/tmp/zed.debug.log";
|
||
|
||
ZED_EMAIL_ADDR = [ "root" ];
|
||
ZED_EMAIL_PROG = "mail";
|
||
ZED_EMAIL_OPTS = "-s '@SUBJECT@' @ADDRESS@";
|
||
|
||
ZED_NOTIFY_INTERVAL_SECS = 3600;
|
||
ZED_NOTIFY_VERBOSE = false;
|
||
|
||
ZED_USE_ENCLOSURE_LEDS = true;
|
||
ZED_SCRUB_AFTER_RESILVER = false;
|
||
}
|
||
'';
|
||
description = ''
|
||
ZFS Event Daemon /etc/zfs/zed.d/zed.rc content
|
||
|
||
See
|
||
{manpage}`zed(8)`
|
||
for details on ZED and the scripts in /etc/zfs/zed.d to find the possible variables
|
||
'';
|
||
};
|
||
};
|
||
};
|
||
|
||
###### implementation
|
||
|
||
config = mkMerge [
|
||
(mkIf cfgZfs.enabled {
|
||
assertions = [
|
||
{
|
||
assertion = cfgZfs.modulePackage.version == cfgZfs.package.version;
|
||
message = "The kernel module and the userspace tooling versions are not matching, this is an unsupported usecase.";
|
||
}
|
||
{
|
||
assertion = config.networking.hostId != null;
|
||
message = "ZFS requires networking.hostId to be set";
|
||
}
|
||
{
|
||
assertion = !cfgZfs.forceImportAll || cfgZfs.forceImportRoot;
|
||
message = "If you enable boot.zfs.forceImportAll, you must also enable boot.zfs.forceImportRoot";
|
||
}
|
||
{
|
||
assertion = cfgZfs.allowHibernation -> !cfgZfs.forceImportRoot && !cfgZfs.forceImportAll;
|
||
message = "boot.zfs.allowHibernation while force importing is enabled will cause data corruption";
|
||
}
|
||
{
|
||
assertion = !(elem "" allPools);
|
||
message = ''
|
||
Automatic pool detection found an empty pool name, which can't be used.
|
||
Hint: for `fileSystems` entries with `fsType = zfs`, the `device` attribute
|
||
should be a zfs dataset name, like `device = "pool/data/set"`.
|
||
This error can be triggered by using an absolute path, such as `"/dev/disk/..."`.
|
||
'';
|
||
}
|
||
];
|
||
|
||
boot = {
|
||
kernelModules = [ "zfs" ];
|
||
# https://github.com/openzfs/zfs/issues/260
|
||
# https://github.com/openzfs/zfs/issues/12842
|
||
# https://github.com/NixOS/nixpkgs/issues/106093
|
||
kernelParams = lib.optionals (!config.boot.zfs.allowHibernation) [ "nohibernate" ];
|
||
|
||
extraModulePackages = [
|
||
cfgZfs.modulePackage
|
||
];
|
||
};
|
||
|
||
boot.initrd = mkIf inInitrd {
|
||
# spl has been removed in ≥ 2.2.0.
|
||
kernelModules = [ "zfs" ] ++ lib.optional (lib.versionOlder "2.2.0" version) "spl";
|
||
extraUtilsCommands =
|
||
mkIf (!config.boot.initrd.systemd.enable) ''
|
||
copy_bin_and_libs ${cfgZfs.package}/sbin/zfs
|
||
copy_bin_and_libs ${cfgZfs.package}/sbin/zdb
|
||
copy_bin_and_libs ${cfgZfs.package}/sbin/zpool
|
||
copy_bin_and_libs ${cfgZfs.package}/lib/udev/vdev_id
|
||
copy_bin_and_libs ${cfgZfs.package}/lib/udev/zvol_id
|
||
'';
|
||
extraUtilsCommandsTest =
|
||
mkIf (!config.boot.initrd.systemd.enable) ''
|
||
$out/bin/zfs --help >/dev/null 2>&1
|
||
$out/bin/zpool --help >/dev/null 2>&1
|
||
'';
|
||
postDeviceCommands = mkIf (!config.boot.initrd.systemd.enable) (concatStringsSep "\n" ([''
|
||
ZFS_FORCE="${optionalString cfgZfs.forceImportRoot "-f"}"
|
||
''] ++ [(importLib {
|
||
# See comments at importLib definition.
|
||
zpoolCmd = "zpool";
|
||
awkCmd = "awk";
|
||
inherit cfgZfs;
|
||
})] ++ (map (pool: ''
|
||
echo -n "importing root ZFS pool \"${pool}\"..."
|
||
# Loop across the import until it succeeds, because the devices needed may not be discovered yet.
|
||
if ! poolImported "${pool}"; then
|
||
for trial in `seq 1 60`; do
|
||
poolReady "${pool}" > /dev/null && msg="$(poolImport "${pool}" 2>&1)" && break
|
||
sleep 1
|
||
echo -n .
|
||
done
|
||
echo
|
||
if [[ -n "$msg" ]]; then
|
||
echo "$msg";
|
||
fi
|
||
poolImported "${pool}" || poolImport "${pool}" # Try one last time, e.g. to import a degraded pool.
|
||
fi
|
||
|
||
${optionalString config.boot.initrd.clevis.enable (concatMapStringsSep "\n" (elem: "clevis decrypt < /etc/clevis/${elem}.jwe | zfs load-key ${elem}") (filter (p: (elemAt (splitString "/" p) 0) == pool) clevisDatasets))}
|
||
|
||
${if isBool cfgZfs.requestEncryptionCredentials
|
||
then optionalString cfgZfs.requestEncryptionCredentials ''
|
||
zfs load-key -a
|
||
''
|
||
else concatMapStrings (fs: ''
|
||
zfs load-key -- ${escapeShellArg fs}
|
||
'') (filter (x: datasetToPool x == pool) cfgZfs.requestEncryptionCredentials)}
|
||
'') rootPools)));
|
||
|
||
# Systemd in stage 1
|
||
systemd = mkIf config.boot.initrd.systemd.enable {
|
||
packages = [cfgZfs.package];
|
||
services = listToAttrs (map (pool: createImportService {
|
||
inherit pool;
|
||
systemd = config.boot.initrd.systemd.package;
|
||
force = cfgZfs.forceImportRoot;
|
||
prefix = "/sysroot";
|
||
}) rootPools);
|
||
targets.zfs-import.wantedBy = [ "zfs.target" ];
|
||
targets.zfs.wantedBy = [ "initrd.target" ];
|
||
extraBin = {
|
||
zpool = "${cfgZfs.package}/sbin/zpool";
|
||
zfs = "${cfgZfs.package}/sbin/zfs";
|
||
awk = "${pkgs.gawk}/bin/awk";
|
||
};
|
||
storePaths = [
|
||
"${cfgZfs.package}/lib/udev/vdev_id"
|
||
"${cfgZfs.package}/lib/udev/zvol_id"
|
||
];
|
||
};
|
||
services.udev.packages = [cfgZfs.package]; # to hook zvol naming, in stage 1
|
||
};
|
||
|
||
systemd.shutdownRamfs.contents."/etc/systemd/system-shutdown/zpool".source = pkgs.writeShellScript "zpool-sync-shutdown" ''
|
||
exec ${cfgZfs.package}/bin/zpool sync
|
||
'';
|
||
systemd.shutdownRamfs.storePaths = ["${cfgZfs.package}/bin/zpool"];
|
||
|
||
# TODO FIXME See https://github.com/NixOS/nixpkgs/pull/99386#issuecomment-798813567. To not break people's bootloader and as probably not everybody would read release notes that thoroughly add inSystem.
|
||
boot.loader.grub = mkIf (inInitrd || inSystem) {
|
||
zfsSupport = true;
|
||
zfsPackage = cfgZfs.package;
|
||
};
|
||
|
||
services.zfs.zed.settings = {
|
||
ZED_EMAIL_PROG = mkIf cfgZED.enableMail (mkDefault (
|
||
config.security.wrapperDir + "/" +
|
||
config.services.mail.sendmailSetuidWrapper.program
|
||
));
|
||
# subject in header for sendmail
|
||
ZED_EMAIL_OPTS = mkIf cfgZED.enableMail (mkDefault "@ADDRESS@");
|
||
|
||
PATH = lib.makeBinPath [
|
||
cfgZfs.package
|
||
pkgs.coreutils
|
||
pkgs.curl
|
||
pkgs.gawk
|
||
pkgs.gnugrep
|
||
pkgs.gnused
|
||
pkgs.nettools
|
||
pkgs.util-linux
|
||
];
|
||
};
|
||
|
||
# ZFS already has its own scheduler. Without this my(@Artturin) computer froze for a second when I nix build something.
|
||
services.udev.extraRules = ''
|
||
ACTION=="add|change", KERNEL=="sd[a-z]*[0-9]*|mmcblk[0-9]*p[0-9]*|nvme[0-9]*n[0-9]*p[0-9]*", ENV{ID_FS_TYPE}=="zfs_member", ATTR{../queue/scheduler}="none"
|
||
'';
|
||
|
||
environment.etc = genAttrs
|
||
(map
|
||
(file: "zfs/zed.d/${file}")
|
||
[
|
||
"all-syslog.sh"
|
||
"pool_import-led.sh"
|
||
"resilver_finish-start-scrub.sh"
|
||
"statechange-led.sh"
|
||
"vdev_attach-led.sh"
|
||
"zed-functions.sh"
|
||
"data-notify.sh"
|
||
"resilver_finish-notify.sh"
|
||
"scrub_finish-notify.sh"
|
||
"statechange-notify.sh"
|
||
"vdev_clear-led.sh"
|
||
]
|
||
)
|
||
(file: { source = "${cfgZfs.package}/etc/${file}"; })
|
||
// {
|
||
"zfs/zed.d/zed.rc".text = zedConf;
|
||
"zfs/zpool.d".source = "${cfgZfs.package}/etc/zfs/zpool.d/";
|
||
};
|
||
|
||
system.fsPackages = [ cfgZfs.package ]; # XXX: needed? zfs doesn't have (need) a fsck
|
||
environment.systemPackages = [ cfgZfs.package ]
|
||
++ optional cfgSnapshots.enable autosnapPkg; # so the user can run the command to see flags
|
||
|
||
services.udev.packages = [ cfgZfs.package ]; # to hook zvol naming, etc.
|
||
systemd.packages = [ cfgZfs.package ];
|
||
|
||
systemd.services = let
|
||
createImportService' = pool: createImportService {
|
||
inherit pool;
|
||
systemd = config.systemd.package;
|
||
force = cfgZfs.forceImportAll;
|
||
};
|
||
|
||
# This forces a sync of any ZFS pools prior to poweroff, even if they're set
|
||
# to sync=disabled.
|
||
createSyncService = pool:
|
||
nameValuePair "zfs-sync-${pool}" {
|
||
description = "Sync ZFS pool \"${pool}\"";
|
||
wantedBy = [ "shutdown.target" ];
|
||
unitConfig = {
|
||
DefaultDependencies = false;
|
||
};
|
||
serviceConfig = {
|
||
Type = "oneshot";
|
||
RemainAfterExit = true;
|
||
};
|
||
script = ''
|
||
${cfgZfs.package}/sbin/zfs set nixos:shutdown-time="$(date)" "${pool}"
|
||
'';
|
||
};
|
||
|
||
createZfsService = serv:
|
||
nameValuePair serv {
|
||
after = [ "systemd-modules-load.service" ];
|
||
wantedBy = [ "zfs.target" ];
|
||
};
|
||
|
||
in listToAttrs (map createImportService' dataPools ++
|
||
map createSyncService allPools ++
|
||
map createZfsService [ "zfs-mount" "zfs-share" "zfs-zed" ]);
|
||
|
||
systemd.targets.zfs-import.wantedBy = [ "zfs.target" ];
|
||
|
||
systemd.targets.zfs.wantedBy = [ "multi-user.target" ];
|
||
})
|
||
|
||
(mkIf (cfgZfs.enabled && cfgExpandOnBoot != "disabled") {
|
||
systemd.services."zpool-expand@" = {
|
||
description = "Expand ZFS pools";
|
||
after = [ "zfs.target" ];
|
||
|
||
serviceConfig = {
|
||
Type = "oneshot";
|
||
RemainAfterExit = true;
|
||
};
|
||
|
||
scriptArgs = "%i";
|
||
path = [ cfgZfs.package ];
|
||
|
||
script = ''
|
||
pool=$1
|
||
|
||
echo "Expanding all devices for $pool."
|
||
|
||
${pkgs.zpool-auto-expand-partitions}/bin/zpool_part_disks --automatically-grow "$pool"
|
||
'';
|
||
};
|
||
|
||
systemd.services."zpool-expand-pools" =
|
||
let
|
||
# Create a string, to be interpolated in a bash script
|
||
# which enumerates all of the pools to expand.
|
||
# If the `pools` option is `true`, we want to dynamically
|
||
# expand every pool. Otherwise we want to enumerate
|
||
# just the specifically provided list of pools.
|
||
poolListProvider = if cfgExpandOnBoot == "all"
|
||
then "$(zpool list -H -o name)"
|
||
else lib.escapeShellArgs cfgExpandOnBoot;
|
||
in
|
||
{
|
||
description = "Expand specified ZFS pools";
|
||
wantedBy = [ "default.target" ];
|
||
after = [ "zfs.target" ];
|
||
|
||
serviceConfig = {
|
||
Type = "oneshot";
|
||
RemainAfterExit = true;
|
||
};
|
||
|
||
path = lib.optionals (cfgExpandOnBoot == "all") [ cfgZfs.package ];
|
||
|
||
script = ''
|
||
for pool in ${poolListProvider}; do
|
||
systemctl start --no-block "zpool-expand@$pool"
|
||
done
|
||
'';
|
||
};
|
||
})
|
||
|
||
(mkIf (cfgZfs.enabled && cfgSnapshots.enable) {
|
||
systemd.services = let
|
||
descr = name: if name == "frequent" then "15 mins"
|
||
else if name == "hourly" then "hour"
|
||
else if name == "daily" then "day"
|
||
else if name == "weekly" then "week"
|
||
else if name == "monthly" then "month"
|
||
else throw "unknown snapshot name";
|
||
numSnapshots = name: builtins.getAttr name cfgSnapshots;
|
||
in builtins.listToAttrs (map (snapName:
|
||
{
|
||
name = "zfs-snapshot-${snapName}";
|
||
value = {
|
||
description = "ZFS auto-snapshotting every ${descr snapName}";
|
||
after = [ "zfs-import.target" ];
|
||
serviceConfig = {
|
||
Type = "oneshot";
|
||
ExecStart = "${zfsAutoSnap} ${cfgSnapFlags} ${snapName} ${toString (numSnapshots snapName)}";
|
||
};
|
||
restartIfChanged = false;
|
||
};
|
||
}) snapshotNames);
|
||
|
||
systemd.timers = let
|
||
timer = name: if name == "frequent" then "*:0,15,30,45" else name;
|
||
in builtins.listToAttrs (map (snapName:
|
||
{
|
||
name = "zfs-snapshot-${snapName}";
|
||
value = {
|
||
wantedBy = [ "timers.target" ];
|
||
timerConfig = {
|
||
OnCalendar = timer snapName;
|
||
Persistent = "yes";
|
||
};
|
||
};
|
||
}) snapshotNames);
|
||
})
|
||
|
||
(mkIf (cfgZfs.enabled && cfgScrub.enable) {
|
||
systemd.services.zfs-scrub = {
|
||
description = "ZFS pools scrubbing";
|
||
after = [ "zfs-import.target" ];
|
||
serviceConfig = {
|
||
Type = "simple";
|
||
};
|
||
script = ''
|
||
${cfgZfs.package}/bin/zpool scrub -w ${
|
||
if cfgScrub.pools != [] then
|
||
(concatStringsSep " " cfgScrub.pools)
|
||
else
|
||
"$(${cfgZfs.package}/bin/zpool list -H -o name)"
|
||
}
|
||
'';
|
||
};
|
||
|
||
systemd.timers.zfs-scrub = {
|
||
wantedBy = [ "timers.target" ];
|
||
after = [ "multi-user.target" ]; # Apparently scrubbing before boot is complete hangs the system? #53583
|
||
timerConfig = {
|
||
OnCalendar = cfgScrub.interval;
|
||
Persistent = "yes";
|
||
RandomizedDelaySec = cfgScrub.randomizedDelaySec;
|
||
};
|
||
};
|
||
})
|
||
|
||
(mkIf (cfgZfs.enabled && cfgTrim.enable) {
|
||
systemd.services.zpool-trim = {
|
||
description = "ZFS pools trim";
|
||
after = [ "zfs-import.target" ];
|
||
path = [ cfgZfs.package ];
|
||
startAt = cfgTrim.interval;
|
||
# By default we ignore errors returned by the trim command, in case:
|
||
# - HDDs are mixed with SSDs
|
||
# - There is a SSDs in a pool that is currently trimmed.
|
||
# - There are only HDDs and we would set the system in a degraded state
|
||
serviceConfig.ExecStart = "${pkgs.runtimeShell} -c 'for pool in $(zpool list -H -o name); do zpool trim $pool; done || true' ";
|
||
};
|
||
|
||
systemd.timers.zpool-trim.timerConfig = {
|
||
Persistent = "yes";
|
||
RandomizedDelaySec = cfgTrim.randomizedDelaySec;
|
||
};
|
||
})
|
||
];
|
||
}
|