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