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