96 lines
2.5 KiB
Nix
96 lines
2.5 KiB
Nix
{ config, lib, pkgs, options, ... }:
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let
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cfg = config.services.prometheus.exporters.varnish;
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inherit (lib)
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mkOption
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types
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mkDefault
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optional
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escapeShellArg
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concatStringsSep
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;
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in
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{
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port = 9131;
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extraOpts = {
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noExit = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Do not exit server on Varnish scrape errors.
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'';
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};
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withGoMetrics = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Export go runtime and http handler metrics.
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'';
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};
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verbose = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable verbose logging.
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'';
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};
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raw = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable raw stdout logging without timestamps.
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'';
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};
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varnishStatPath = mkOption {
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type = types.str;
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default = "varnishstat";
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description = ''
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Path to varnishstat.
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'';
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};
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instance = mkOption {
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type = types.nullOr types.str;
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default = config.services.varnish.stateDir;
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defaultText = lib.literalExpression "config.services.varnish.stateDir";
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description = ''
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varnishstat -n value.
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'';
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};
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healthPath = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Path under which to expose healthcheck. Disabled unless configured.
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'';
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};
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telemetryPath = mkOption {
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type = types.str;
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default = "/metrics";
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description = ''
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Path under which to expose metrics.
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'';
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};
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};
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serviceOpts = {
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path = [ config.services.varnish.package ];
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serviceConfig = {
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RestartSec = mkDefault 1;
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DynamicUser = false;
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ExecStart = ''
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${pkgs.prometheus-varnish-exporter}/bin/prometheus_varnish_exporter \
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--web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
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--web.telemetry-path ${cfg.telemetryPath} \
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--varnishstat-path ${escapeShellArg cfg.varnishStatPath} \
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${concatStringsSep " \\\n " (cfg.extraFlags
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++ optional (cfg.healthPath != null) "--web.health-path ${cfg.healthPath}"
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++ optional (cfg.instance != null) "-n ${escapeShellArg cfg.instance}"
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++ optional cfg.noExit "--no-exit"
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++ optional cfg.withGoMetrics "--with-go-metrics"
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++ optional cfg.verbose "--verbose"
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++ optional cfg.raw "--raw")}
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'';
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};
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};
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}
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