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add zfs support/test/example
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65
default.nix
65
default.nix
@ -38,6 +38,13 @@ let
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};
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};
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config.zfs_filesystem = q: x: {
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fileSystems.${x.mountpoint} = {
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device = q.device;
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fsType = "zfs";
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};
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};
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config.devices = q: x:
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foldl' recursiveUpdate {} (mapAttrsToList (name: config-f { device = "/dev/${name}"; }) x.content);
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@ -67,8 +74,8 @@ let
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'';
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create.devices = q: x: let
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raid-devices = lib.filterAttrs (_: dev: dev.type == "mdadm") x.content;
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other-devices = lib.filterAttrs (_: dev: dev.type != "mdadm") x.content;
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raid-devices = lib.filterAttrs (_: dev: dev.type == "mdadm" || dev.type == "zpool") x.content;
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other-devices = lib.filterAttrs (_: dev: dev.type != "mdadm" && dev.type != "zpool") x.content;
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in ''
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${concatStrings (mapAttrsToList (name: create-f { device = "/dev/${name}"; }) other-devices)}
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${concatStrings (mapAttrsToList (name: create-f { device = "/dev/${name}"; name = name; }) raid-devices)}
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@ -125,6 +132,32 @@ let
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${concatStrings (imap (index: create-f (q // { inherit index; })) x.partitions)}
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'';
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create.zfs = q: x: ''
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ZFSDEVICES_${x.pool}="''${ZFSDEVICES_${x.pool}:-}${q.device} "
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'';
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create.zfs_filesystem = q: x: ''
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zfs create ${q.pool}/${x.name} \
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${lib.optionalString (isAttrs x.options or null) (concatStringsSep " " (mapAttrsToList (n: v: "-o ${n}=${v}") x.options))}
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'';
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create.zfs_volume = q: x: ''
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zfs create ${q.pool}/${x.name} \
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-V ${x.size} \
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${lib.optionalString (isAttrs x.options or null) (concatStringsSep " " (mapAttrsToList (n: v: "-o ${n}=${v}") x.options))}
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udevadm trigger --subsystem-match=block; udevadm settle
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${create-f { device = "/dev/zvol/${q.pool}/${x.name}"; } x.content}
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'';
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create.zpool = q: x: ''
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zpool create ${q.name} \
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${lib.optionalString (!isNull x.mode || x.mode != "stripe") x.mode} \
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${lib.optionalString (isAttrs x.options or null) (concatStringsSep " " (mapAttrsToList (n: v: "-o ${n}=${v}") x.options))} \
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${lib.optionalString (isAttrs x.rootFsOptions or null) (concatStringsSep " " (mapAttrsToList (n: v: "-O ${n}=${v}") x.rootFsOptions))} \
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''${ZFSDEVICES_${q.name}}
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${concatMapStrings (create-f (q // { pool = q.name; })) x.datasets}
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'';
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mount-f = q: x: mount.${x.type} q x;
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@ -144,6 +177,8 @@ let
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${optionalString (hasAttr "table" z) (concatStringsSep "\n" (attrValues z.table))}
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${optionalString (hasAttr "luks" z) (concatStringsSep "\n" (attrValues z.luks))}
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${optionalString (hasAttr "lvm" z) (concatStringsSep "\n" (attrValues z.lvm))}
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${optionalString (hasAttr "zpool" z) (concatStringsSep "\n" (attrValues z.zpool))}
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${optionalString (hasAttr "zfs" z) (concatStringsSep "\n" (attrValues z.zfs))}
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${optionalString (hasAttr "fs" z) (concatStringsSep "\n" (attrValues z.fs))}
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'';
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@ -170,7 +205,6 @@ let
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mount.mdadm = q: x:
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mount-f { device = "/dev/md/${q.name}"; } x.content;
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# TODO maybe we need to do something here?
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mount.mdraid = mount.noop;
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mount.partition = q: x:
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@ -181,6 +215,31 @@ let
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(foldl' recursiveUpdate {} (imap (index: mount-f (q // { inherit index; device = helper.device-id q.device; })) x.partitions))
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{table.${q.device} = helper.find-device q.device;}
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);
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mount.zfs = mount.noop;
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mount.zpool = q: x: (
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recursiveUpdate
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(foldl' recursiveUpdate {} (map (mount-f (q // { pool = q.name; })) x.datasets))
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{zpool.${q.device} = ''
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zpool list '${q.name}' >/dev/null 2>/dev/null || zpool import '${q.name}'
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'';}
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);
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mount.zfs_filesystem = q: x: {
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zfs.${x.mountpoint} = ''
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if ! findmnt '${q.pool}/${x.name}' /mnt${x.mountpoint} > /dev/null 2>&1; then
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mount \
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${lib.optionalString ((x.options.mountpoint or "") != "legacy") "-o zfsutil"} \
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-t zfs ${q.pool}/${x.name} /mnt${x.mountpoint} \
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-o X-mount.mkdir
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fi
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'';
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};
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mount.zfs_volume = q: x:
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mount-f { device = "/dev/zvol/${q.pool}/${x.name}"; } x.content;
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in {
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config = config-f {};
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create = cfg: ''
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41
example/zfs.nix
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41
example/zfs.nix
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@ -0,0 +1,41 @@
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{
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type = "devices";
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content = {
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vdb = {
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type = "zfs";
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pool = "zroot";
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};
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vdc = {
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type = "zfs";
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pool = "zroot";
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};
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zroot = {
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type = "zpool";
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mode = "mirror";
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datasets = [
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{
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type = "zfs_filesystem";
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name = "zfs_fs";
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mountpoint = "/zfs_fs";
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}
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{
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type = "zfs_filesystem";
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name = "zfs_legacy_fs";
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options.mountpoint = "legacy";
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mountpoint = "/zfs_legacy_fs";
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}
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{
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type = "zfs_volume";
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name = "zfs_testvolume";
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size = "10M";
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content = {
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type = "filesystem";
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format = "ext4";
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mountpoint = "/ext4onzfs";
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};
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}
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];
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};
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};
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}
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40
tests/zfs.nix
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40
tests/zfs.nix
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@ -0,0 +1,40 @@
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{ makeTest ? import <nixpkgs/nixos/tests/make-test-python.nix>
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, pkgs ? (import <nixpkgs> {})
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}:
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let
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makeTest' = args:
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makeTest args {
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inherit pkgs;
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inherit (pkgs) system;
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};
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disko-config = import ../example/zfs.nix;
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tsp-create = pkgs.writeScript "create" ((pkgs.callPackage ../. {}).create disko-config);
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tsp-mount = pkgs.writeScript "mount" ((pkgs.callPackage ../. {}).mount disko-config);
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in makeTest' {
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name = "disko";
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nodes.machine =
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{ config, pkgs, modulesPath, ... }:
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{
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imports = [
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(modulesPath + "/profiles/installation-device.nix")
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(modulesPath + "/profiles/base.nix")
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];
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# speed-up eval
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documentation.enable = false;
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virtualisation.emptyDiskImages = [ 512 512 ];
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};
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testScript = ''
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machine.succeed("echo 'secret' > /tmp/secret.key");
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machine.succeed("${tsp-create}");
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machine.succeed("${tsp-mount}");
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machine.succeed("${tsp-mount}"); # verify that the command is idempotent
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machine.succeed("test -b /dev/zvol/zroot/zfs_testvolume");
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machine.succeed("grep -qs '/mnt/ext4onzfs' /proc/mounts");
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'';
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}
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