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Add the hostid option. Refactor code a bit better for initrd(untested) and system operation.

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This commit is contained in:
Jack Cummings 2012-12-04 11:57:59 -08:00
parent d2789791ee
commit b42d52eeb0
1 changed files with 48 additions and 21 deletions
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69
modules/tasks/filesystems/zfs.nix
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@ -1,41 +1,68 @@
{ config, pkgs, ... }:
#
# todo:
# - crontab for scrubs, etc
# - zfs tunables
# - /etc/zfs/zpool.cache handling
with pkgs.lib;
let
cfgSpl = config.environment.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 = {
environment.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 adapaters, 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 (any (fs: fs == "zfs") config.boot.supportedFilesystems) {
config = mkIf ( inInitrd || inSystem ) {
boot.kernelModules = [ "spl" "zfs" ] ;
boot.extraModulePackages = [ kernel.zfs kernel.spl ];
boot = {
kernelModules = [ "spl" "zfs" ] ;
extraModulePackages = [ kernel.zfs kernel.spl ];
extraModprobeConfig = mkIf (cfgSpl.hostid != "") "options spl spl_hostid=${cfgSpl.hostid}";
};
boot.initrd.kernelModules = mkIf inInitrd [ "spl" "zfs" ] ;
boot.initrd.extraUtilsCommands = mkIf inInitrd
''
cp -v ${kernel.zfs}/sbin/zfs $out/sbin
cp -v ${kernel.zfs}/sbin/zdb $out/sbin
cp -v ${kernel.zfs}/sbin/zpool $out/sbin
'';
boot.initrd.postDeviceCommands = mkIf inInitrd
''
zpool import -f -a -d /dev
zfs mount -a
'';
system.fsPackages = [ kernel.zfs ];
boot.initrd = mkIf inInitrd {
kernelModules = [ "spl" "zfs" ] ;
extraUtilsCommands =
''
cp -v ${kernel.zfs}/sbin/zfs $out/sbin
cp -v ${kernel.zfs}/sbin/zdb $out/sbin
cp -v ${kernel.zfs}/sbin/zpool $out/sbin
'';
postDeviceCommands =
''
zpool import -f -a -d /dev
zfs mount -a
'';
};
system.fsPackages = [ kernel.zfs ]; # XXX: needed? zfs doesn't have a fsck
environment.systemPackages = [ kernel.zfs ];
services.udev.packages = [ kernel.zfs ];
services.udev.packages = [ kernel.zfs ]; # to hook zvol naming, etc.
};
}