128 lines
3.8 KiB
Nix
128 lines
3.8 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib)
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maintainers types literalExpression
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escapeShellArg escapeShellArgs
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mkEnableOption mkOption mkRemovedOptionModule mkIf
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mkPackageOption optionalString concatMapStrings concatStringsSep;
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cfg = config.services.mtr-exporter;
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jobsConfig = pkgs.writeText "mtr-exporter.conf" (concatMapStrings (job: ''
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${job.name} -- ${job.schedule} -- ${concatStringsSep " " job.flags} ${job.address}
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'') cfg.jobs);
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in {
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imports = [
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(mkRemovedOptionModule [ "services" "mtr-exporter" "target" ] "Use services.mtr-exporter.jobs instead.")
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(mkRemovedOptionModule [ "services" "mtr-exporter" "mtrFlags" ] "Use services.mtr-exporter.jobs.<job>.flags instead.")
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];
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options = {
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services = {
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mtr-exporter = {
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enable = mkEnableOption "a Prometheus exporter for MTR";
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address = mkOption {
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type = types.str;
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default = "127.0.0.1";
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description = "Listen address for MTR exporter.";
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};
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port = mkOption {
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type = types.port;
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default = 8080;
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description = "Listen port for MTR exporter.";
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};
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extraFlags = mkOption {
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type = types.listOf types.str;
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default = [];
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example = ["-flag.deprecatedMetrics"];
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description = ''
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Extra command line options to pass to MTR exporter.
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'';
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};
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package = mkPackageOption pkgs "mtr-exporter" { };
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mtrPackage = mkPackageOption pkgs "mtr" { };
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jobs = mkOption {
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description = "List of MTR jobs. Will be added to /etc/mtr-exporter.conf";
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type = types.nonEmptyListOf (types.submodule {
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options = {
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name = mkOption {
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type = types.str;
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description = "Name of ICMP pinging job.";
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};
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address = mkOption {
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type = types.str;
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example = "host.example.org:1234";
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description = "Target address for MTR client.";
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};
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schedule = mkOption {
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type = types.str;
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default = "@every 60s";
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example = "@hourly";
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description = "Schedule of MTR checks. Also accepts Cron format.";
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};
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flags = mkOption {
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type = with types; listOf str;
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default = [];
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example = ["-G1"];
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description = "Additional flags to pass to MTR.";
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};
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};
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});
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};
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};
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};
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};
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config = mkIf cfg.enable {
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environment.etc."mtr-exporter.conf" = {
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source = jobsConfig;
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};
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systemd.services.mtr-exporter = {
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wantedBy = [ "multi-user.target" ];
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requires = [ "network.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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ExecStart = ''
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${cfg.package}/bin/mtr-exporter \
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-mtr '${cfg.mtrPackage}/bin/mtr' \
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-bind ${escapeShellArg "${cfg.address}:${toString cfg.port}"} \
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-jobs '${jobsConfig}' \
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${escapeShellArgs cfg.extraFlags}
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'';
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Restart = "on-failure";
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# Hardening
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CapabilityBoundingSet = [ "" ];
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DynamicUser = true;
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LockPersonality = true;
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ProcSubset = "pid";
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PrivateDevices = true;
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PrivateUsers = true;
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PrivateTmp = true;
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ProtectClock = true;
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ProtectControlGroups = true;
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ProtectHome = true;
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ProtectHostname = true;
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ProtectKernelLogs = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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ProtectProc = "invisible";
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ProtectSystem = "strict";
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RestrictNamespaces = true;
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RestrictRealtime = true;
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};
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};
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};
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meta.maintainers = with maintainers; [ jakubgs ];
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}
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