nixos/prometheus-node-exporter: fix netdev collect

Netdev collector needs AF_NETLINK permissions to work. It will fail with
the message "couldn't get netstats: socket: address family is not
supported by protocol" otherwise.

KFears b3782f29 593929c7

Changed files
+5 -3
nixos
modules
services
monitoring
prometheus
exporters
+5 -3
nixos/modules/services/monitoring/prometheus/exporters/node.nix
···
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;
···
${concatMapStringsSep " " (x: "--no-collector." + x) cfg.disabledCollectors} \
--web.listen-address ${cfg.listenAddress}:${toString cfg.port} ${concatStringsSep " " cfg.extraFlags}
'';
-
RestrictAddressFamilies = optionals (any (collector: (collector == "logind" || collector == "systemd")) cfg.enabledCollectors) [
+
RestrictAddressFamilies = optionals (collectorIsEnabled "logind" || collectorIsEnabled "systemd") [
# needs access to dbus via unix sockets (logind/systemd)
"AF_UNIX"
-
] ++ optionals (any (collector: (collector == "network_route" || collector == "wifi")) cfg.enabledCollectors) [
+
] ++ 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 = any (collector: collector == "timex") cfg.disabledCollectors;
+
ProtectClock = collectorIsDisabled "timex";
# Allow space monitoring under /home
ProtectHome = true;
};