diff options
author | Gregor Kleen <gkleen@yggdrasil.li> | 2021-01-02 20:53:17 +0100 |
---|---|---|
committer | Gregor Kleen <gkleen@yggdrasil.li> | 2021-01-03 16:21:34 +0100 |
commit | f6e600c20d6a97ebeda23fa2bb5621646222b2b0 (patch) | |
tree | 5551a23218db79e3edbf41557b474121f0745821 /modules/borgbackup/btrfs-snapshots.nix | |
parent | f4fa33d0d258c4f66f804ed3fc3be590d8039e6e (diff) | |
download | nixos-f6e600c20d6a97ebeda23fa2bb5621646222b2b0.tar nixos-f6e600c20d6a97ebeda23fa2bb5621646222b2b0.tar.gz nixos-f6e600c20d6a97ebeda23fa2bb5621646222b2b0.tar.bz2 nixos-f6e600c20d6a97ebeda23fa2bb5621646222b2b0.tar.xz nixos-f6e600c20d6a97ebeda23fa2bb5621646222b2b0.zip |
sif: import config
Diffstat (limited to 'modules/borgbackup/btrfs-snapshots.nix')
-rw-r--r-- | modules/borgbackup/btrfs-snapshots.nix | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/modules/borgbackup/btrfs-snapshots.nix b/modules/borgbackup/btrfs-snapshots.nix new file mode 100644 index 00000000..96d2b2ba --- /dev/null +++ b/modules/borgbackup/btrfs-snapshots.nix | |||
@@ -0,0 +1,52 @@ | |||
1 | { config, lib, pkgs, ... }: | ||
2 | |||
3 | with lib; | ||
4 | |||
5 | let | ||
6 | cfg = config.services.btrfs-snapshots; | ||
7 | |||
8 | snapshotMount = str: "${str}${cfg.mountSuffix}"; | ||
9 | in { | ||
10 | options = { | ||
11 | |||
12 | services.btrfs-snapshots = { | ||
13 | enable = mkEnableOption "a systemd unit for btrfs snapshots"; | ||
14 | |||
15 | mountSuffix = mkOption { | ||
16 | type = types.str; | ||
17 | default = ".snapshot"; | ||
18 | }; | ||
19 | |||
20 | readOnly = mkOption { | ||
21 | type = types.bool; | ||
22 | default = true; | ||
23 | }; | ||
24 | |||
25 | persist = mkOption { | ||
26 | type = types.bool; | ||
27 | default = false; | ||
28 | }; | ||
29 | }; | ||
30 | |||
31 | }; | ||
32 | |||
33 | |||
34 | config = mkIf cfg.enable { | ||
35 | systemd.services."btrfs-snapshot@" = { | ||
36 | enable = true; | ||
37 | |||
38 | unitConfig = { | ||
39 | StopWhenUnneeded = !cfg.persist; | ||
40 | }; | ||
41 | |||
42 | serviceConfig = with pkgs; { | ||
43 | Type = "oneshot"; | ||
44 | ExecStartPre = "-${btrfs-progs}/bin/btrfs subvolume delete -c ${snapshotMount "%f"}"; | ||
45 | ExecStart = "${btrfs-progs}/bin/btrfs subvolume snapshot ${optionalString cfg.readOnly "-r"} %f ${snapshotMount "%f"}"; | ||
46 | RemainAfterExit = true; | ||
47 | ExecStop = "${btrfs-progs}/bin/btrfs subvolume delete -c ${snapshotMount "%f"}"; | ||
48 | }; | ||
49 | }; | ||
50 | |||
51 | }; | ||
52 | } | ||