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{ config, lib, pkgs, options, ... }:
with lib;
let
cfg = config.services.prometheus.exporters.node;
collectorIsEnabled = final: any (collector: (final == collector)) cfg.enabledCollectors;
collectorIsDisabled = final: any (collector: (final == collector)) cfg.disabledCollectors;
in
{
port = 9100;
extraOpts = {
enabledCollectors = mkOption {
type = types.listOf types.str;
default = [];
example = [ "systemd" ];
description = lib.mdDoc ''
Collectors to enable. The collectors listed here are enabled in addition to the default ones.
'';
};
disabledCollectors = mkOption {
type = types.listOf types.str;
default = [];
example = [ "timex" ];
description = lib.mdDoc ''
Collectors to disable which are enabled by default.
'';
};
};
serviceOpts = {
serviceConfig = {
DynamicUser = false;
RuntimeDirectory = "prometheus-node-exporter";
ExecStart = ''
${pkgs.prometheus-node-exporter}/bin/node_exporter \
${concatMapStringsSep " " (x: "--collector." + x) cfg.enabledCollectors} \
${concatMapStringsSep " " (x: "--no-collector." + x) cfg.disabledCollectors} \
--web.listen-address ${cfg.listenAddress}:${toString cfg.port} ${concatStringsSep " " cfg.extraFlags}
'';
RestrictAddressFamilies = optionals (collectorIsEnabled "logind" || collectorIsEnabled "systemd") [
# needs access to dbus via unix sockets (logind/systemd)
"AF_UNIX"
] ++ optionals (collectorIsEnabled "network_route" || collectorIsEnabled "wifi" || ! collectorIsDisabled "netdev") [
# needs netlink sockets for wireless collector
"AF_NETLINK"
];
# The timex collector needs to access clock APIs
ProtectClock = collectorIsDisabled "timex";
# Allow space monitoring under /home
ProtectHome = true;
};
};
}
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