blob: 0472fb4ba1e752ae5da60c524aeb690b6505348d (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.sanoid;
datasetSettingsType = with types;
(attrsOf (nullOr (oneOf [ str int bool (listOf str) ]))) // {
description = "dataset/template options";
};
# Default values from https://github.com/jimsalterjrs/sanoid/blob/master/sanoid.defaults.conf
commonOptions = {
hourly = mkOption {
description = "Number of hourly snapshots.";
type = types.ints.unsigned;
default = 48;
};
daily = mkOption {
description = "Number of daily snapshots.";
type = types.ints.unsigned;
default = 90;
};
monthly = mkOption {
description = "Number of monthly snapshots.";
type = types.ints.unsigned;
default = 6;
};
yearly = mkOption {
description = "Number of yearly snapshots.";
type = types.ints.unsigned;
default = 0;
};
autoprune = mkOption {
description = "Whether to automatically prune old snapshots.";
type = types.bool;
default = true;
};
autosnap = mkOption {
description = "Whether to automatically take snapshots.";
type = types.bool;
default = true;
};
settings = mkOption {
description = ''
Free-form settings for this template/dataset. See
<link xlink:href="https://github.com/jimsalterjrs/sanoid/blob/master/sanoid.defaults.conf"/>
for allowed values.
'';
type = datasetSettingsType;
};
};
commonConfig = config: {
settings = {
hourly = mkDefault config.hourly;
daily = mkDefault config.daily;
monthly = mkDefault config.monthly;
yearly = mkDefault config.yearly;
autoprune = mkDefault config.autoprune;
autosnap = mkDefault config.autosnap;
};
};
datasetOptions = {
useTemplate = mkOption {
description = "Names of the templates to use for this dataset.";
type = (types.listOf (types.enum (attrNames cfg.templates))) // {
description = "list of template names";
};
default = [];
};
recursive = mkOption {
description = "Whether to recursively snapshot dataset children.";
type = types.bool;
default = false;
};
processChildrenOnly = mkOption {
description = "Whether to only snapshot child datasets if recursing.";
type = types.bool;
default = false;
};
};
datasetConfig = config: {
settings = {
use_template = mkDefault config.useTemplate;
recursive = mkDefault config.recursive;
process_children_only = mkDefault config.processChildrenOnly;
};
};
# Extract pool names from configured datasets
pools = unique (map (d: head (builtins.match "([^/]+).*" d)) (attrNames cfg.datasets));
configFile = let
mkValueString = v:
if builtins.isList v then concatStringsSep "," v
else generators.mkValueStringDefault {} v;
mkKeyValue = k: v: if v == null then ""
else generators.mkKeyValueDefault { inherit mkValueString; } "=" k v;
in generators.toINI { inherit mkKeyValue; } cfg.settings;
configDir = pkgs.writeTextDir "sanoid.conf" configFile;
in {
# Interface
options.services.sanoid = {
enable = mkEnableOption "Sanoid ZFS snapshotting service";
interval = mkOption {
type = types.str;
default = "hourly";
example = "daily";
description = ''
Run sanoid at this interval. The default is to run hourly.
The format is described in
<citerefentry><refentrytitle>systemd.time</refentrytitle>
<manvolnum>7</manvolnum></citerefentry>.
'';
};
datasets = mkOption {
type = types.attrsOf (types.submodule ({ config, ... }: {
options = commonOptions // datasetOptions;
config = mkMerge [ (commonConfig config) (datasetConfig config) ];
}));
default = {};
description = "Datasets to snapshot.";
};
templates = mkOption {
type = types.attrsOf (types.submodule ({ config, ... }: {
options = commonOptions;
config = commonConfig config;
}));
default = {};
description = "Templates for datasets.";
};
settings = mkOption {
type = types.attrsOf datasetSettingsType;
description = ''
Free-form settings written directly to the config file. See
<link xlink:href="https://github.com/jimsalterjrs/sanoid/blob/master/sanoid.defaults.conf"/>
for allowed values.
'';
};
extraArgs = mkOption {
type = types.listOf types.str;
default = [];
example = [ "--verbose" "--readonly" "--debug" ];
description = ''
Extra arguments to pass to sanoid. See
<link xlink:href="https://github.com/jimsalterjrs/sanoid/#sanoid-command-line-options"/>
for allowed options.
'';
};
};
# Implementation
config = mkIf cfg.enable {
services.sanoid.settings = mkMerge [
(mapAttrs' (d: v: nameValuePair ("template_" + d) v.settings) cfg.templates)
(mapAttrs (d: v: v.settings) cfg.datasets)
];
systemd.services.sanoid = {
description = "Sanoid snapshot service";
serviceConfig = {
ExecStartPre = map (pool: lib.escapeShellArgs [
"+/run/booted-system/sw/bin/zfs" "allow"
"sanoid" "snapshot,mount,destroy" pool
]) pools;
ExecStart = lib.escapeShellArgs ([
"${pkgs.sanoid}/bin/sanoid"
"--cron"
"--configdir" configDir
] ++ cfg.extraArgs);
ExecStopPost = map (pool: lib.escapeShellArgs [
"+/run/booted-system/sw/bin/zfs" "unallow" "sanoid" pool
]) pools;
User = "sanoid";
Group = "sanoid";
DynamicUser = true;
RuntimeDirectory = "sanoid";
CacheDirectory = "sanoid";
};
# Prevents missing snapshots during DST changes
environment.TZ = "UTC";
after = [ "zfs.target" ];
startAt = cfg.interval;
};
};
meta.maintainers = with maintainers; [ lopsided98 ];
}
|