pyrox.dev
1{
2 config,
3 lib,
4 pkgs,
5 options,
6 ...
7}:
8
9let
10 cfg = config.services.prometheus.exporters.junos-czerwonk;
11 inherit (lib)
12 mkOption
13 types
14 escapeShellArg
15 mkIf
16 concatStringsSep
17 ;
18
19 configFile =
20 if cfg.configuration != null then configurationFile else (escapeShellArg cfg.configurationFile);
21
22 configurationFile = pkgs.writeText "prometheus-junos-czerwonk-exporter.conf" (
23 builtins.toJSON (cfg.configuration)
24 );
25in
26{
27 port = 9326;
28 extraOpts = {
29 environmentFile = mkOption {
30 type = types.nullOr types.str;
31 default = null;
32 description = ''
33 File containing env-vars to be substituted into the exporter's config.
34 '';
35 };
36 configurationFile = mkOption {
37 type = types.nullOr types.path;
38 default = null;
39 description = ''
40 Specify the JunOS exporter configuration file to use.
41 '';
42 };
43 configuration = mkOption {
44 type = types.nullOr types.attrs;
45 default = null;
46 description = ''
47 JunOS exporter configuration as nix attribute set. Mutually exclusive with the `configurationFile` option.
48 '';
49 example = {
50 devices = [
51 {
52 host = "router1";
53 key_file = "/path/to/key";
54 }
55 ];
56 };
57 };
58 telemetryPath = mkOption {
59 type = types.str;
60 default = "/metrics";
61 description = ''
62 Path under which to expose metrics.
63 '';
64 };
65 };
66 serviceOpts = {
67 serviceConfig = {
68 DynamicUser = false;
69 EnvironmentFile = mkIf (cfg.environmentFile != null) [ cfg.environmentFile ];
70 RuntimeDirectory = "prometheus-junos-czerwonk-exporter";
71 ExecStartPre = [
72 "${pkgs.writeShellScript "subst-secrets-junos-czerwonk-exporter" ''
73 umask 0077
74 ${pkgs.envsubst}/bin/envsubst -i ${configFile} -o ''${RUNTIME_DIRECTORY}/junos-exporter.json
75 ''}"
76 ];
77 ExecStart = ''
78 ${pkgs.prometheus-junos-czerwonk-exporter}/bin/junos_exporter \
79 -web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
80 -web.telemetry-path ${cfg.telemetryPath} \
81 -config.file ''${RUNTIME_DIRECTORY}/junos-exporter.json \
82 ${concatStringsSep " \\\n " cfg.extraFlags}
83 '';
84 };
85 };
86}