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{ config, lib, pkgs, options, ... }:
with lib;
let
cfg = config.services.prometheus.exporters.wireguard;
in {
port = 9586;
imports = [
(mkRenamedOptionModule [ "addr" ] [ "listenAddress" ])
({ options.warnings = options.warnings; options.assertions = options.assertions; })
];
extraOpts = {
verbose = mkEnableOption (lib.mdDoc "verbose logging mode for prometheus-wireguard-exporter");
wireguardConfig = mkOption {
type = with types; nullOr (either path str);
default = null;
description = lib.mdDoc ''
Path to the Wireguard Config to
[add the peer's name to the stats of a peer](https://github.com/MindFlavor/prometheus_wireguard_exporter/tree/2.0.0#usage).
Please note that `networking.wg-quick` is required for this feature
as `networking.wireguard` uses
{manpage}`wg(8)`
to set the peers up.
'';
};
singleSubnetPerField = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
By default, all allowed IPs and subnets are comma-separated in the
`allowed_ips` field. With this option enabled,
a single IP and subnet will be listed in fields like `allowed_ip_0`,
`allowed_ip_1` and so on.
'';
};
withRemoteIp = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Whether or not the remote IP of a WireGuard peer should be exposed via prometheus.
'';
};
};
serviceOpts = {
path = [ pkgs.wireguard-tools ];
serviceConfig = {
AmbientCapabilities = [ "CAP_NET_ADMIN" ];
CapabilityBoundingSet = [ "CAP_NET_ADMIN" ];
ExecStart = ''
${pkgs.prometheus-wireguard-exporter}/bin/prometheus_wireguard_exporter \
-p ${toString cfg.port} \
-l ${cfg.listenAddress} \
${optionalString cfg.verbose "-v true"} \
${optionalString cfg.singleSubnetPerField "-s true"} \
${optionalString cfg.withRemoteIp "-r true"} \
${optionalString (cfg.wireguardConfig != null) "-n ${escapeShellArg cfg.wireguardConfig}"}
'';
RestrictAddressFamilies = [
# Need AF_NETLINK to collect data
"AF_NETLINK"
];
};
};
}
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