pyrox.dev
1{ config, lib, pkgs, options }:
2
3with lib;
4
5let
6 cfg = config.services.prometheus.exporters.varnish;
7in
8{
9 port = 9131;
10 extraOpts = {
11 noExit = mkOption {
12 type = types.bool;
13 default = false;
14 description = ''
15 Do not exit server on Varnish scrape errors.
16 '';
17 };
18 withGoMetrics = mkOption {
19 type = types.bool;
20 default = false;
21 description = ''
22 Export go runtime and http handler metrics.
23 '';
24 };
25 verbose = mkOption {
26 type = types.bool;
27 default = false;
28 description = ''
29 Enable verbose logging.
30 '';
31 };
32 raw = mkOption {
33 type = types.bool;
34 default = false;
35 description = ''
36 Enable raw stdout logging without timestamps.
37 '';
38 };
39 varnishStatPath = mkOption {
40 type = types.str;
41 default = "varnishstat";
42 description = ''
43 Path to varnishstat.
44 '';
45 };
46 instance = mkOption {
47 type = types.nullOr types.str;
48 default = null;
49 description = ''
50 varnishstat -n value.
51 '';
52 };
53 healthPath = mkOption {
54 type = types.nullOr types.str;
55 default = null;
56 description = ''
57 Path under which to expose healthcheck. Disabled unless configured.
58 '';
59 };
60 telemetryPath = mkOption {
61 type = types.str;
62 default = "/metrics";
63 description = ''
64 Path under which to expose metrics.
65 '';
66 };
67 };
68 serviceOpts = {
69 path = [ pkgs.varnish ];
70 serviceConfig = {
71 RestartSec = mkDefault 1;
72 DynamicUser = false;
73 ExecStart = ''
74 ${pkgs.prometheus-varnish-exporter}/bin/prometheus_varnish_exporter \
75 --web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
76 --web.telemetry-path ${cfg.telemetryPath} \
77 --varnishstat-path ${escapeShellArg cfg.varnishStatPath} \
78 ${concatStringsSep " \\\n " (cfg.extraFlags
79 ++ optional (cfg.healthPath != null) "--web.health-path ${cfg.healthPath}"
80 ++ optional (cfg.instance != null) "-n ${escapeShellArg cfg.instance}"
81 ++ optional cfg.noExit "--no-exit"
82 ++ optional cfg.withGoMetrics "--with-go-metrics"
83 ++ optional cfg.verbose "--verbose"
84 ++ optional cfg.raw "--raw")}
85 '';
86 };
87 };
88}