mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-18 15:56:50 +01:00
fc02b14738
nixos/zfs: Fix regression that prevents people to boot from zfs using grub if they didn't add zfs to boot.initrd.supportedFilesystems
692 lines
25 KiB
Nix
692 lines
25 KiB
Nix
{ config, lib, pkgs, utils, ... }:
|
|
#
|
|
# TODO: zfs tunables
|
|
|
|
with utils;
|
|
with lib;
|
|
|
|
let
|
|
|
|
cfgZfs = config.boot.zfs;
|
|
cfgSnapshots = config.services.zfs.autoSnapshot;
|
|
cfgSnapFlags = cfgSnapshots.flags;
|
|
cfgScrub = config.services.zfs.autoScrub;
|
|
cfgTrim = config.services.zfs.trim;
|
|
cfgZED = config.services.zfs.zed;
|
|
|
|
inInitrd = any (fs: fs == "zfs") config.boot.initrd.supportedFilesystems;
|
|
inSystem = any (fs: fs == "zfs") config.boot.supportedFilesystems;
|
|
|
|
autosnapPkg = pkgs.zfstools.override {
|
|
zfs = cfgZfs.package;
|
|
};
|
|
|
|
zfsAutoSnap = "${autosnapPkg}/bin/zfs-auto-snapshot";
|
|
|
|
datasetToPool = x: elemAt (splitString "/" x) 0;
|
|
|
|
fsToPool = fs: datasetToPool fs.device;
|
|
|
|
zfsFilesystems = filter (x: x.fsType == "zfs") config.system.build.fileSystems;
|
|
|
|
allPools = unique ((map fsToPool zfsFilesystems) ++ cfgZfs.extraPools);
|
|
|
|
rootPools = unique (map fsToPool (filter fsNeededForBoot zfsFilesystems));
|
|
|
|
dataPools = unique (filter (pool: !(elem pool rootPools)) allPools);
|
|
|
|
snapshotNames = [ "frequent" "hourly" "daily" "weekly" "monthly" ];
|
|
|
|
# When importing ZFS pools, there's one difficulty: These scripts may run
|
|
# before the backing devices (physical HDDs, etc.) of the pool have been
|
|
# scanned and initialized.
|
|
#
|
|
# An attempted import with all devices missing will just fail, and can be
|
|
# retried, but an import where e.g. two out of three disks in a three-way
|
|
# mirror are missing, will succeed. This is a problem: When the missing disks
|
|
# are later discovered, they won't be automatically set online, rendering the
|
|
# pool redundancy-less (and far slower) until such time as the system reboots.
|
|
#
|
|
# The solution is the below. poolReady checks the status of an un-imported
|
|
# pool, to see if *every* device is available -- in which case the pool will be
|
|
# in state ONLINE, as opposed to DEGRADED, FAULTED or MISSING.
|
|
#
|
|
# The import scripts then loop over this, waiting until the pool is ready or a
|
|
# sufficient amount of time has passed that we can assume it won't be. In the
|
|
# latter case it makes one last attempt at importing, allowing the system to
|
|
# (eventually) boot even with a degraded pool.
|
|
importLib = {zpoolCmd, awkCmd, cfgZfs}: ''
|
|
poolReady() {
|
|
pool="$1"
|
|
state="$("${zpoolCmd}" import 2>/dev/null | "${awkCmd}" "/pool: $pool/ { found = 1 }; /state:/ { if (found == 1) { print \$2; exit } }; END { if (found == 0) { print \"MISSING\" } }")"
|
|
if [[ "$state" = "ONLINE" ]]; then
|
|
return 0
|
|
else
|
|
echo "Pool $pool in state $state, waiting"
|
|
return 1
|
|
fi
|
|
}
|
|
poolImported() {
|
|
pool="$1"
|
|
"${zpoolCmd}" list "$pool" >/dev/null 2>/dev/null
|
|
}
|
|
poolImport() {
|
|
pool="$1"
|
|
"${zpoolCmd}" import -d "${cfgZfs.devNodes}" -N $ZFS_FORCE "$pool"
|
|
}
|
|
'';
|
|
|
|
zedConf = generators.toKeyValue {
|
|
mkKeyValue = generators.mkKeyValueDefault {
|
|
mkValueString = v:
|
|
if isInt v then toString v
|
|
else if isString v then "\"${v}\""
|
|
else if true == v then "1"
|
|
else if false == v then "0"
|
|
else if isList v then "\"" + (concatStringsSep " " v) + "\""
|
|
else err "this value is" (toString v);
|
|
} "=";
|
|
} cfgZED.settings;
|
|
in
|
|
|
|
{
|
|
|
|
imports = [
|
|
(mkRemovedOptionModule [ "boot" "zfs" "enableLegacyCrypto" ] "The corresponding package was removed from nixpkgs.")
|
|
];
|
|
|
|
###### interface
|
|
|
|
options = {
|
|
boot.zfs = {
|
|
package = mkOption {
|
|
readOnly = true;
|
|
type = types.package;
|
|
default = if config.boot.zfs.enableUnstable then pkgs.zfsUnstable else pkgs.zfs;
|
|
description = "Configured ZFS userland tools package.";
|
|
};
|
|
|
|
enabled = mkOption {
|
|
readOnly = true;
|
|
type = types.bool;
|
|
default = inInitrd || inSystem;
|
|
description = "True if ZFS filesystem support is enabled";
|
|
};
|
|
|
|
enableUnstable = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Use the unstable zfs package. This might be an option, if the latest
|
|
kernel is not yet supported by a published release of ZFS. Enabling
|
|
this option will install a development version of ZFS on Linux. The
|
|
version will have already passed an extensive test suite, but it is
|
|
more likely to hit an undiscovered bug compared to running a released
|
|
version of ZFS on Linux.
|
|
'';
|
|
};
|
|
|
|
extraPools = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
example = [ "tank" "data" ];
|
|
description = ''
|
|
Name or GUID of extra ZFS pools that you wish to import during boot.
|
|
|
|
Usually this is not necessary. Instead, you should set the mountpoint property
|
|
of ZFS filesystems to <literal>legacy</literal> and add the ZFS filesystems to
|
|
NixOS's <option>fileSystems</option> option, which makes NixOS automatically
|
|
import the associated pool.
|
|
|
|
However, in some cases (e.g. if you have many filesystems) it may be preferable
|
|
to exclusively use ZFS commands to manage filesystems. If so, since NixOS/systemd
|
|
will not be managing those filesystems, you will need to specify the ZFS pool here
|
|
so that NixOS automatically imports it on every boot.
|
|
'';
|
|
};
|
|
|
|
devNodes = mkOption {
|
|
type = types.path;
|
|
default = "/dev/disk/by-id";
|
|
example = "/dev/disk/by-id";
|
|
description = ''
|
|
Name of directory from which to import ZFS devices.
|
|
|
|
This should be a path under /dev containing stable names for all devices needed, as
|
|
import may fail if device nodes are renamed concurrently with a device failing.
|
|
'';
|
|
};
|
|
|
|
forceImportRoot = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Forcibly import the ZFS root pool(s) during early boot.
|
|
|
|
This is enabled by default for backwards compatibility purposes, but it is highly
|
|
recommended to disable this option, as it bypasses some of the safeguards ZFS uses
|
|
to protect your ZFS pools.
|
|
|
|
If you set this option to <literal>false</literal> and NixOS subsequently fails to
|
|
boot because it cannot import the root pool, you should boot with the
|
|
<literal>zfs_force=1</literal> option as a kernel parameter (e.g. by manually
|
|
editing the kernel params in grub during boot). You should only need to do this
|
|
once.
|
|
'';
|
|
};
|
|
|
|
forceImportAll = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Forcibly import all ZFS pool(s).
|
|
|
|
If you set this option to <literal>false</literal> and NixOS subsequently fails to
|
|
import your non-root ZFS pool(s), you should manually import each pool with
|
|
"zpool import -f <pool-name>", and then reboot. You should only need to do
|
|
this once.
|
|
'';
|
|
};
|
|
|
|
requestEncryptionCredentials = mkOption {
|
|
type = types.either types.bool (types.listOf types.str);
|
|
default = true;
|
|
example = [ "tank" "data" ];
|
|
description = ''
|
|
If true on import encryption keys or passwords for all encrypted datasets
|
|
are requested. To only decrypt selected datasets supply a list of dataset
|
|
names instead. For root pools the encryption key can be supplied via both
|
|
an interactive prompt (keylocation=prompt) and from a file (keylocation=file://).
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
services.zfs.autoSnapshot = {
|
|
enable = mkOption {
|
|
default = false;
|
|
type = types.bool;
|
|
description = ''
|
|
Enable the (OpenSolaris-compatible) ZFS auto-snapshotting service.
|
|
Note that you must set the <literal>com.sun:auto-snapshot</literal>
|
|
property to <literal>true</literal> on all datasets which you wish
|
|
to auto-snapshot.
|
|
|
|
You can override a child dataset to use, or not use auto-snapshotting
|
|
by setting its flag with the given interval:
|
|
<literal>zfs set com.sun:auto-snapshot:weekly=false DATASET</literal>
|
|
'';
|
|
};
|
|
|
|
flags = mkOption {
|
|
default = "-k -p";
|
|
example = "-k -p --utc";
|
|
type = types.str;
|
|
description = ''
|
|
Flags to pass to the zfs-auto-snapshot command.
|
|
|
|
Run <literal>zfs-auto-snapshot</literal> (without any arguments) to
|
|
see available flags.
|
|
|
|
If it's not too inconvenient for snapshots to have timestamps in UTC,
|
|
it is suggested that you append <literal>--utc</literal> to the list
|
|
of default options (see example).
|
|
|
|
Otherwise, snapshot names can cause name conflicts or apparent time
|
|
reversals due to daylight savings, timezone or other date/time changes.
|
|
'';
|
|
};
|
|
|
|
frequent = mkOption {
|
|
default = 4;
|
|
type = types.int;
|
|
description = ''
|
|
Number of frequent (15-minute) auto-snapshots that you wish to keep.
|
|
'';
|
|
};
|
|
|
|
hourly = mkOption {
|
|
default = 24;
|
|
type = types.int;
|
|
description = ''
|
|
Number of hourly auto-snapshots that you wish to keep.
|
|
'';
|
|
};
|
|
|
|
daily = mkOption {
|
|
default = 7;
|
|
type = types.int;
|
|
description = ''
|
|
Number of daily auto-snapshots that you wish to keep.
|
|
'';
|
|
};
|
|
|
|
weekly = mkOption {
|
|
default = 4;
|
|
type = types.int;
|
|
description = ''
|
|
Number of weekly auto-snapshots that you wish to keep.
|
|
'';
|
|
};
|
|
|
|
monthly = mkOption {
|
|
default = 12;
|
|
type = types.int;
|
|
description = ''
|
|
Number of monthly auto-snapshots that you wish to keep.
|
|
'';
|
|
};
|
|
};
|
|
|
|
services.zfs.trim = {
|
|
enable = mkOption {
|
|
description = "Whether to enable periodic TRIM on all ZFS pools.";
|
|
default = true;
|
|
example = false;
|
|
type = types.bool;
|
|
};
|
|
|
|
interval = mkOption {
|
|
default = "weekly";
|
|
type = types.str;
|
|
example = "daily";
|
|
description = ''
|
|
How often we run trim. For most desktop and server systems
|
|
a sufficient trimming frequency is once a week.
|
|
|
|
The format is described in
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle>
|
|
<manvolnum>7</manvolnum></citerefentry>.
|
|
'';
|
|
};
|
|
};
|
|
|
|
services.zfs.autoScrub = {
|
|
enable = mkEnableOption "periodic scrubbing of ZFS pools";
|
|
|
|
interval = mkOption {
|
|
default = "Sun, 02:00";
|
|
type = types.str;
|
|
example = "daily";
|
|
description = ''
|
|
Systemd calendar expression when to scrub ZFS pools. See
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle>
|
|
<manvolnum>7</manvolnum></citerefentry>.
|
|
'';
|
|
};
|
|
|
|
pools = mkOption {
|
|
default = [];
|
|
type = types.listOf types.str;
|
|
example = [ "tank" ];
|
|
description = ''
|
|
List of ZFS pools to periodically scrub. If empty, all pools
|
|
will be scrubbed.
|
|
'';
|
|
};
|
|
};
|
|
|
|
services.zfs.zed = {
|
|
enableMail = mkEnableOption "ZED's ability to send emails" // {
|
|
default = cfgZfs.package.enableMail;
|
|
};
|
|
|
|
settings = mkOption {
|
|
type = with types; attrsOf (oneOf [ str int bool (listOf str) ]);
|
|
example = literalExample ''
|
|
{
|
|
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
|
|
<citerefentry><refentrytitle>zed</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
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 = cfgZED.enableMail -> cfgZfs.package.enableMail;
|
|
message = ''
|
|
To allow ZED to send emails, ZFS needs to be configured to enable
|
|
this. To do so, one must override the `zfs` package and set
|
|
`enableMail` to true.
|
|
'';
|
|
}
|
|
{
|
|
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";
|
|
}
|
|
];
|
|
|
|
boot = {
|
|
kernelModules = [ "zfs" ];
|
|
|
|
extraModulePackages = [
|
|
(if config.boot.zfs.enableUnstable then
|
|
config.boot.kernelPackages.zfsUnstable
|
|
else
|
|
config.boot.kernelPackages.zfs)
|
|
];
|
|
};
|
|
|
|
boot.initrd = mkIf inInitrd {
|
|
kernelModules = [ "zfs" ] ++ optional (!cfgZfs.enableUnstable) "spl";
|
|
extraUtilsCommands =
|
|
''
|
|
copy_bin_and_libs ${cfgZfs.package}/sbin/zfs
|
|
copy_bin_and_libs ${cfgZfs.package}/sbin/zdb
|
|
copy_bin_and_libs ${cfgZfs.package}/sbin/zpool
|
|
'';
|
|
extraUtilsCommandsTest = mkIf inInitrd
|
|
''
|
|
$out/bin/zfs --help >/dev/null 2>&1
|
|
$out/bin/zpool --help >/dev/null 2>&1
|
|
'';
|
|
postDeviceCommands = concatStringsSep "\n" ([''
|
|
ZFS_FORCE="${optionalString cfgZfs.forceImportRoot "-f"}"
|
|
|
|
for o in $(cat /proc/cmdline); do
|
|
case $o in
|
|
zfs_force|zfs_force=1)
|
|
ZFS_FORCE="-f"
|
|
;;
|
|
esac
|
|
done
|
|
''] ++ [(importLib {
|
|
# See comments at importLib definition.
|
|
zpoolCmd = "zpool";
|
|
awkCmd = "awk";
|
|
inherit cfgZfs;
|
|
})] ++ (map (pool: ''
|
|
echo -n "importing root ZFS pool \"${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
|
|
${if isBool cfgZfs.requestEncryptionCredentials
|
|
then optionalString cfgZfs.requestEncryptionCredentials ''
|
|
zfs load-key -a
|
|
''
|
|
else concatMapStrings (fs: ''
|
|
zfs load-key ${fs}
|
|
'') cfgZfs.requestEncryptionCredentials}
|
|
'') rootPools));
|
|
};
|
|
|
|
# TODO FIXME See https://github.com/NixOS/nixpkgs/pull/99386#issuecomment-798813567. To not break people's bootloader and as probably not everybody would read release notes that thoroughly add inSystem.
|
|
boot.loader.grub = mkIf (inInitrd || inSystem) {
|
|
zfsSupport = true;
|
|
};
|
|
|
|
services.zfs.zed.settings = {
|
|
ZED_EMAIL_PROG = mkIf cfgZED.enableMail (mkDefault "${pkgs.mailutils}/bin/mail");
|
|
PATH = lib.makeBinPath [
|
|
cfgZfs.package
|
|
pkgs.coreutils
|
|
pkgs.curl
|
|
pkgs.gawk
|
|
pkgs.gnugrep
|
|
pkgs.gnused
|
|
pkgs.nettools
|
|
pkgs.util-linux
|
|
];
|
|
};
|
|
|
|
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
|
|
getPoolFilesystems = pool:
|
|
filter (x: x.fsType == "zfs" && (fsToPool x) == pool) config.system.build.fileSystems;
|
|
|
|
getPoolMounts = pool:
|
|
let
|
|
mountPoint = fs: escapeSystemdPath fs.mountPoint;
|
|
in
|
|
map (x: "${mountPoint x}.mount") (getPoolFilesystems pool);
|
|
|
|
createImportService = pool:
|
|
nameValuePair "zfs-import-${pool}" {
|
|
description = "Import ZFS pool \"${pool}\"";
|
|
# we need systemd-udev-settle until https://github.com/zfsonlinux/zfs/pull/4943 is merged
|
|
requires = [ "systemd-udev-settle.service" ];
|
|
after = [
|
|
"systemd-udev-settle.service"
|
|
"systemd-modules-load.service"
|
|
"systemd-ask-password-console.service"
|
|
];
|
|
wantedBy = (getPoolMounts pool) ++ [ "local-fs.target" ];
|
|
before = (getPoolMounts pool) ++ [ "local-fs.target" ];
|
|
unitConfig = {
|
|
DefaultDependencies = "no";
|
|
};
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
RemainAfterExit = true;
|
|
};
|
|
environment.ZFS_FORCE = optionalString cfgZfs.forceImportAll "-f";
|
|
script = (importLib {
|
|
# See comments at importLib definition.
|
|
zpoolCmd = "${cfgZfs.package}/sbin/zpool";
|
|
awkCmd = "${pkgs.gawk}/bin/awk";
|
|
inherit cfgZfs;
|
|
}) + ''
|
|
poolImported "${pool}" && exit
|
|
echo -n "importing ZFS pool \"${pool}\"..."
|
|
# Loop across the import until it succeeds, because the devices needed may not be discovered yet.
|
|
for trial in `seq 1 60`; do
|
|
poolReady "${pool}" && poolImport "${pool}" && break
|
|
sleep 1
|
|
done
|
|
poolImported "${pool}" || poolImport "${pool}" # Try one last time, e.g. to import a degraded pool.
|
|
if poolImported "${pool}"; then
|
|
${optionalString (if isBool cfgZfs.requestEncryptionCredentials
|
|
then cfgZfs.requestEncryptionCredentials
|
|
else cfgZfs.requestEncryptionCredentials != []) ''
|
|
${cfgZfs.package}/sbin/zfs list -rHo name,keylocation ${pool} | while IFS=$'\t' read ds kl; do
|
|
(${optionalString (!isBool cfgZfs.requestEncryptionCredentials) ''
|
|
if ! echo '${concatStringsSep "\n" cfgZfs.requestEncryptionCredentials}' | grep -qFx "$ds"; then
|
|
continue
|
|
fi
|
|
''}
|
|
case "$kl" in
|
|
none )
|
|
;;
|
|
prompt )
|
|
${config.systemd.package}/bin/systemd-ask-password "Enter key for $ds:" | ${cfgZfs.package}/sbin/zfs load-key "$ds"
|
|
;;
|
|
* )
|
|
${cfgZfs.package}/sbin/zfs load-key "$ds"
|
|
;;
|
|
esac) < /dev/null # To protect while read ds kl in case anything reads stdin
|
|
done
|
|
''}
|
|
echo "Successfully imported ${pool}"
|
|
else
|
|
exit 1
|
|
fi
|
|
'';
|
|
};
|
|
|
|
# This forces a sync of any ZFS pools prior to poweroff, even if they're set
|
|
# to sync=disabled.
|
|
createSyncService = pool:
|
|
nameValuePair "zfs-sync-${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)" "${pool}"
|
|
'';
|
|
};
|
|
createZfsService = serv:
|
|
nameValuePair serv {
|
|
after = [ "systemd-modules-load.service" ];
|
|
wantedBy = [ "zfs.target" ];
|
|
};
|
|
|
|
in listToAttrs (map createImportService dataPools ++
|
|
map createSyncService allPools ++
|
|
map createZfsService [ "zfs-mount" "zfs-share" "zfs-zed" ]);
|
|
|
|
systemd.targets.zfs-import =
|
|
let
|
|
services = map (pool: "zfs-import-${pool}.service") dataPools;
|
|
in
|
|
{
|
|
requires = services;
|
|
after = services;
|
|
wantedBy = [ "zfs.target" ];
|
|
};
|
|
|
|
systemd.targets.zfs.wantedBy = [ "multi-user.target" ];
|
|
})
|
|
|
|
(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 = "oneshot";
|
|
};
|
|
script = ''
|
|
${cfgZfs.package}/bin/zpool scrub ${
|
|
if cfgScrub.pools != [] then
|
|
(concatStringsSep " " cfgScrub.pools)
|
|
else
|
|
"$(${cfgZfs.package}/bin/zpool list -H -o name)"
|
|
}
|
|
'';
|
|
};
|
|
|
|
systemd.timers.zfs-scrub = {
|
|
wantedBy = [ "timers.target" ];
|
|
after = [ "multi-user.target" ]; # Apparently scrubbing before boot is complete hangs the system? #53583
|
|
timerConfig = {
|
|
OnCalendar = cfgScrub.interval;
|
|
Persistent = "yes";
|
|
};
|
|
};
|
|
})
|
|
|
|
(mkIf (cfgZfs.enabled && cfgTrim.enable) {
|
|
systemd.services.zpool-trim = {
|
|
description = "ZFS pools trim";
|
|
after = [ "zfs-import.target" ];
|
|
path = [ cfgZfs.package ];
|
|
startAt = cfgTrim.interval;
|
|
# By default we ignore errors returned by the trim command, in case:
|
|
# - HDDs are mixed with SSDs
|
|
# - There is a SSDs in a pool that is currently trimmed.
|
|
# - There are only HDDs and we would set the system in a degraded state
|
|
serviceConfig.ExecStart = "${pkgs.runtimeShell} -c 'for pool in $(zpool list -H -o name); do zpool trim $pool; done || true' ";
|
|
};
|
|
|
|
systemd.timers.zpool-trim.timerConfig.Persistent = "yes";
|
|
})
|
|
];
|
|
}
|