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zfs-with-vdevs: add an example for using absolute device paths

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This is the only way to assign devices rather than fixed gpt partitions.
Without reading the code it's not very obvious how disko actually
assigns devices to zpools.
This commit is contained in:
Jörg Thalheim 2024-12-24 14:45:19 +01:00
parent 2ee76c861a
commit 7ea6edd857
3 changed files with 46 additions and 5 deletions
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9
example/zfs-with-vdevs.nix
View file

@ -244,11 +244,14 @@
type = "topology";
vdev = [
{
mode = "mirror";
members = [ "data1" "data2" ];
# This syntax expects a disk called 'data3' with a gpt partition called 'zfs'.
members = [ "data1" ];
# It's also possible to use the full path of the device or partition
# members = [ "/dev/disk/by-id/wwn-0x5000c500af8b2a14" ];
}
{
members = [ "data3" ];
mode = "mirror";
members = [ "data2" "data3" ];
}
];
spare = [ "spare" ];

38
lib/types/zpool.nix
View file

@ -25,6 +25,44 @@ in
};
mode = lib.mkOption {
default = "";
example = {
mode = {
topology = {
type = "topology";
vdev = [
{
# Members can be either specified by a full path or by a disk name
# This is example uses the full path
members = [ "/dev/disk/by-id/wwn-0x5000c500af8b2a14" ];
}
];
log = [
{
# Example using gpt partition labels
# This expects an disk called `ssd` with a gpt partition called `zfs`
# disko.devices.disk.ssd = {
# type = "disk";
# device = "/dev/nvme0n1";
# content = {
# type = "gpt";
# partitions = {
# zfs = {
# size = "100%";
# content = {
# type = "zfs";
# # use your own pool name here
# pool = "zroot";
# };
# };
# };
# };
# };
members = [ "ssd" ];
}
];
};
};
};
type = (lib.types.oneOf [
(lib.types.enum modeOptions)
(lib.types.attrsOf (diskoLib.subType {

4
tests/zfs-with-vdevs.nix
View file

@ -57,9 +57,9 @@ diskoLib.testLib.makeDiskoTest {
vdev = ""
actual.sort()
expected=sorted([
'zroot /dev/disk/by-partlabel/disk-data3-zfs',
'zroot mirror /dev/disk/by-partlabel/disk-data1-zfs',
'zroot /dev/disk/by-partlabel/disk-data1-zfs',
'zroot mirror /dev/disk/by-partlabel/disk-data2-zfs',
'zroot mirror /dev/disk/by-partlabel/disk-data3-zfs',
'dedup /dev/disk/by-partlabel/disk-dedup3-zfs',
'dedup mirror /dev/disk/by-partlabel/disk-dedup1-zfs',
'dedup mirror /dev/disk/by-partlabel/disk-dedup2-zfs',