blob: c6a001d30eeb3387f5ca859c803ad2e023cf5b10 (
plain)
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
|
{ config, lib, pkgs, ... }:
with lib;
let
ecfg = config.services.earlyoom;
in
{
options = {
services.earlyoom = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Enable early out of memory killing.
'';
};
freeMemThreshold = mkOption {
type = types.int;
default = 10;
description = ''
Minimum of availabe memory (in percent).
If the free memory falls below this threshold and the analog is true for
<option>services.earlyoom.freeSwapThreshold</option>
the killing begins.
'';
};
freeSwapThreshold = mkOption {
type = types.int;
default = 10;
description = ''
Minimum of availabe swap space (in percent).
If the available swap space falls below this threshold and the analog
is true for <option>services.earlyoom.freeMemThreshold</option>
the killing begins.
'';
};
useKernelOOMKiller= mkOption {
type = types.bool;
default = false;
description = ''
Use kernel OOM killer instead of own user-space implementation.
'';
};
ignoreOOMScoreAdjust = mkOption {
type = types.bool;
default = false;
description = ''
Ignore oom_score_adjust values of processes.
User-space implementation only.
'';
};
enableDebugInfo = mkOption {
type = types.bool;
default = false;
description = ''
Enable debugging messages.
'';
};
notificationsCommand = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
This option is deprecated and ignored by earlyoom since 1.6.
Use <option>services.earlyoom.enableNotifications</option> instead.
'';
};
enableNotifications = mkOption {
type = types.bool;
default = false;
description = ''
Send notifications about killed processes via the system d-bus.
To actually see the notifications in your GUI session, you need to have
<literal>systembus-notify</literal> running as your user.
See <link xlink:href="https://github.com/rfjakob/earlyoom#notifications">README</link> for details.
'';
};
};
};
config = mkIf ecfg.enable {
assertions = [
{ assertion = ecfg.freeMemThreshold > 0 && ecfg.freeMemThreshold <= 100;
message = "Needs to be a positive percentage"; }
{ assertion = ecfg.freeSwapThreshold > 0 && ecfg.freeSwapThreshold <= 100;
message = "Needs to be a positive percentage"; }
{ assertion = !ecfg.useKernelOOMKiller || !ecfg.ignoreOOMScoreAdjust;
message = "Both options in conjunction do not make sense"; }
];
warnings = optional (ecfg.notificationsCommand != null)
"`services.earlyoom.notificationsCommand` is deprecated and ignored by earlyoom since 1.6.";
systemd.services.earlyoom = {
description = "Early OOM Daemon for Linux";
wantedBy = [ "multi-user.target" ];
path = optional ecfg.enableNotifications pkgs.dbus;
serviceConfig = {
StandardOutput = "null";
StandardError = "syslog";
ExecStart = ''
${pkgs.earlyoom}/bin/earlyoom \
-m ${toString ecfg.freeMemThreshold} \
-s ${toString ecfg.freeSwapThreshold} \
${optionalString ecfg.useKernelOOMKiller "-k"} \
${optionalString ecfg.ignoreOOMScoreAdjust "-i"} \
${optionalString ecfg.enableDebugInfo "-d"} \
${optionalString ecfg.enableNotifications "-n"}
'';
};
};
environment.systemPackages = optional ecfg.enableNotifications pkgs.systembus-notify;
};
}
|
