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{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.prometheus.jsonExporter;
in {
options = {
services.prometheus.jsonExporter = {
enable = mkEnableOption "prometheus JSON exporter";
url = mkOption {
type = types.str;
description = ''
URL to scrape JSON from.
'';
};
configFile = mkOption {
type = types.path;
description = ''
Path to configuration file.
'';
};
port = mkOption {
type = types.int;
default = 7979;
description = ''
Port to listen on.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [];
description = ''
Extra commandline options when launching the JSON exporter.
'';
};
openFirewall = mkOption {
type = types.bool;
default = false;
description = ''
Open port in firewall for incoming connections.
'';
};
};
};
config = mkIf cfg.enable {
networking.firewall.allowedTCPPorts = optional cfg.openFirewall cfg.port;
systemd.services.prometheus-json-exporter = {
description = "Prometheus exporter for JSON over HTTP";
unitConfig.Documentation = "https://github.com/kawamuray/prometheus-json-exporter";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
User = "nobody";
Restart = "always";
PrivateTmp = true;
WorkingDirectory = /tmp;
ExecStart = ''
${pkgs.prometheus-json-exporter}/bin/prometheus-json-exporter \
--port ${toString cfg.port} \
${cfg.url} ${cfg.configFile} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
};
};
};
}
|