nixpkgs/nixos/modules/services/monitoring/prometheus/nginx-exporter.nix

79 lines
2.1 KiB
Nix

{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.prometheus.nginxExporter;
in {
options = {
services.prometheus.nginxExporter = {
enable = mkEnableOption "prometheus nginx exporter";
port = mkOption {
type = types.int;
default = 9113;
description = ''
Port to listen on.
'';
};
listenAddress = mkOption {
type = types.string;
default = "0.0.0.0";
description = ''
Address to listen on.
'';
};
scrapeUri = mkOption {
type = types.string;
default = "http://localhost/nginx_status";
description = ''
Address to access the nginx status page.
Can be enabled with services.nginx.statusPage = true.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [];
description = ''
Extra commandline options when launching the nginx 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-nginx-exporter = {
after = [ "network.target" "nginx.service" ];
description = "Prometheus exporter for nginx metrics";
unitConfig.Documentation = "https://github.com/discordianfish/nginx_exporter";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
User = "nobody";
Restart = "always";
PrivateTmp = true;
WorkingDirectory = /tmp;
ExecStart = ''
${pkgs.prometheus-nginx-exporter}/bin/nginx_exporter \
-nginx.scrape_uri '${cfg.scrapeUri}' \
-telemetry.address ${cfg.listenAddress}:${toString cfg.port} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
};
};
};
}