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

62 lines
1.6 KiB
Nix

{ config, pkgs, lib, ... }:
# Shamelessly cribbed from nginx-exporter.nix. ~ C.
with lib;
let
cfg = config.services.prometheus.varnishExporter;
in {
options = {
services.prometheus.varnishExporter = {
enable = mkEnableOption "prometheus Varnish exporter";
port = mkOption {
type = types.int;
default = 9131;
description = ''
Port to listen on.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [];
description = ''
Extra commandline options when launching the Varnish 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-varnish-exporter = {
description = "Prometheus exporter for Varnish metrics";
unitConfig.Documentation = "https://github.com/jonnenauha/prometheus_varnish_exporter";
wantedBy = [ "multi-user.target" ];
path = [ pkgs.varnish ];
script = ''
exec ${pkgs.prometheus-varnish-exporter}/bin/prometheus_varnish_exporter \
-web.listen-address :${toString cfg.port} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
serviceConfig = {
User = "nobody";
Restart = "always";
PrivateTmp = true;
WorkingDirectory = /tmp;
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
};
};
};
}