nixpkgs/nixos/modules/tasks/filesystems/zfs.nix
William A. Kennington III c2f35087d2 Add ZFS dependencies to the initrd so that the zpool command works.
Remove unneeded zfs mount, since zpool automatically mounts everything.

Close #1128.
2013-10-30 16:17:44 +02:00

96 lines
2.6 KiB
Nix

{ config, pkgs, ... }:
#
# todo:
# - crontab for scrubs, etc
# - zfs tunables
# - /etc/zfs/zpool.cache handling
with pkgs.lib;
let
cfgSpl = config.boot.spl;
inInitrd = any (fs: fs == "zfs") config.boot.initrd.supportedFilesystems;
inSystem = any (fs: fs == "zfs") config.boot.supportedFilesystems;
kernel = config.boot.kernelPackages;
in
{
###### interface
options = {
boot.spl.hostid = mkOption {
default = "";
example = "0xdeadbeef";
description = ''
ZFS uses a system's hostid to determine if a storage pool (zpool) is
native to this system, and should thus be imported automatically.
Unfortunately, this hostid can change under linux from boot to boot (by
changing network adapters, for instance). Specify a unique 32 bit hostid in
hex here for zfs to prevent getting a random hostid between boots and having to
manually import pools.
'';
};
};
###### implementation
config = mkIf ( inInitrd || inSystem ) {
boot = {
kernelModules = [ "spl" "zfs" ] ;
extraModulePackages = [ kernel.zfs kernel.spl ];
extraModprobeConfig = mkIf (cfgSpl.hostid != "") ''
options spl spl_hostid=${cfgSpl.hostid}
'';
};
boot.initrd = mkIf inInitrd {
kernelModules = [ "spl" "zfs" ] ;
extraUtilsCommands =
''
cp -v ${kernel.zfs}/sbin/zfs $out/bin
cp -v ${kernel.zfs}/sbin/zdb $out/bin
cp -v ${kernel.zfs}/sbin/zpool $out/bin
cp -pdv ${kernel.zfs}/lib/lib*.so* $out/lib
cp -pdv ${pkgs.zlib}/lib/lib*.so* $out/lib
'';
postDeviceCommands =
''
zpool import -f -a -d /dev
'';
};
systemd.services."zpool-import" = {
description = "Import zpools";
after = [ "systemd-udev-settle.service" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
restartIfChanged = false;
ExecStart = "${kernel.zfs}/sbin/zpool import -f -a -d /dev";
};
};
systemd.services."zfs-mount" = {
description = "Mount zfs volumes";
after = [ "zpool-import.service" ];
wantedBy = [ "local-fs.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
restartIfChanged = false;
ExecStart = "${kernel.zfs}/sbin/zfs mount -a";
ExecStop = "${kernel.zfs}/sbin/zfs umount -a";
};
};
system.fsPackages = [ kernel.zfs ]; # XXX: needed? zfs doesn't have (need) a fsck
environment.systemPackages = [ kernel.zfs ];
services.udev.packages = [ kernel.zfs ]; # to hook zvol naming, etc.
};
}