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|
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.prometheus.exporters;
# each attribute in `exporterOpts` is expected to have specified:
# - port (types.int): port on which the exporter listens
# - serviceOpts (types.attrs): config that is merged with the
# default definition of the exporter's
# systemd service
# - extraOpts (types.attrs): extra configuration options to
# configure the exporter with, which
# are appended to the default options
#
# Note that `extraOpts` is optional, but a script for the exporter's
# systemd service must be provided by specifying either
# `serviceOpts.script` or `serviceOpts.serviceConfig.ExecStart`
exporterOpts = {
blackbox = import ./exporters/blackbox.nix { inherit config lib pkgs; };
collectd = import ./exporters/collectd.nix { inherit config lib pkgs; };
dnsmasq = import ./exporters/dnsmasq.nix { inherit config lib pkgs; };
dovecot = import ./exporters/dovecot.nix { inherit config lib pkgs; };
fritzbox = import ./exporters/fritzbox.nix { inherit config lib pkgs; };
json = import ./exporters/json.nix { inherit config lib pkgs; };
minio = import ./exporters/minio.nix { inherit config lib pkgs; };
nginx = import ./exporters/nginx.nix { inherit config lib pkgs; };
node = import ./exporters/node.nix { inherit config lib pkgs; };
postfix = import ./exporters/postfix.nix { inherit config lib pkgs; };
snmp = import ./exporters/snmp.nix { inherit config lib pkgs; };
surfboard = import ./exporters/surfboard.nix { inherit config lib pkgs; };
tor = import ./exporters/tor.nix { inherit config lib pkgs; };
unifi = import ./exporters/unifi.nix { inherit config lib pkgs; };
varnish = import ./exporters/varnish.nix { inherit config lib pkgs; };
bind = import ./exporters/bind.nix { inherit config lib pkgs; };
wireguard = import ./exporters/wireguard.nix { inherit config lib pkgs; };
};
mkExporterOpts = ({ name, port }: {
enable = mkEnableOption "the prometheus ${name} exporter";
port = mkOption {
type = types.int;
default = port;
description = ''
Port to listen on.
'';
};
listenAddress = mkOption {
type = types.str;
default = "0.0.0.0";
description = ''
Address to listen on.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [];
description = ''
Extra commandline options to pass to the ${name} exporter.
'';
};
openFirewall = mkOption {
type = types.bool;
default = false;
description = ''
Open port in firewall for incoming connections.
'';
};
firewallFilter = mkOption {
type = types.str;
default = "-p tcp -m tcp --dport ${toString port}";
example = literalExample ''
"-i eth0 -p tcp -m tcp --dport ${toString port}"
'';
description = ''
Specify a filter for iptables to use when
<option>services.prometheus.exporters.${name}.openFirewall</option>
is true. It is used as `ip46tables -I nixos-fw <option>firewallFilter</option> -j nixos-fw-accept`.
'';
};
user = mkOption {
type = types.str;
default = "nobody";
description = ''
User name under which the ${name} exporter shall be run.
Has no effect when <option>systemd.services.prometheus-${name}-exporter.serviceConfig.DynamicUser</option> is true.
'';
};
group = mkOption {
type = types.str;
default = "nobody";
description = ''
Group under which the ${name} exporter shall be run.
Has no effect when <option>systemd.services.prometheus-${name}-exporter.serviceConfig.DynamicUser</option> is true.
'';
};
});
mkSubModule = { name, port, extraOpts, ... }: {
${name} = mkOption {
type = types.submodule {
options = (mkExporterOpts {
inherit name port;
} // extraOpts);
};
internal = true;
default = {};
};
};
mkSubModules = (foldl' (a: b: a//b) {}
(mapAttrsToList (name: opts: mkSubModule {
inherit name;
inherit (opts) port serviceOpts;
extraOpts = opts.extraOpts or {};
}) exporterOpts)
);
mkExporterConf = { name, conf, serviceOpts }:
mkIf conf.enable {
networking.firewall.extraCommands = mkIf conf.openFirewall (concatStrings [
"ip46tables -A nixos-fw ${conf.firewallFilter} "
"-m comment --comment ${name}-exporter -j nixos-fw-accept"
]);
systemd.services."prometheus-${name}-exporter" = mkMerge ([{
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig.Restart = mkDefault "always";
serviceConfig.PrivateTmp = mkDefault true;
serviceConfig.WorkingDirectory = mkDefault /tmp;
} serviceOpts ] ++ optional (!(serviceOpts.serviceConfig.DynamicUser or false)) {
serviceConfig.User = conf.user;
serviceConfig.Group = conf.group;
});
};
in
{
options.services.prometheus.exporters = mkOption {
type = types.submodule {
options = (mkSubModules);
};
description = "Prometheus exporter configuration";
default = {};
example = literalExample ''
{
node = {
enable = true;
enabledCollectors = [ "systemd" ];
};
varnish.enable = true;
}
'';
};
config = mkMerge ([{
assertions = [{
assertion = (cfg.snmp.configurationPath == null) != (cfg.snmp.configuration == null);
message = ''
Please ensure you have either `services.prometheus.exporters.snmp.configuration'
or `services.prometheus.exporters.snmp.configurationPath' set!
'';
}];
}] ++ [(mkIf config.services.minio.enable {
services.prometheus.exporters.minio.minioAddress = mkDefault "http://localhost:9000";
services.prometheus.exporters.minio.minioAccessKey = mkDefault config.services.minio.accessKey;
services.prometheus.exporters.minio.minioAccessSecret = mkDefault config.services.minio.secretKey;
})] ++ (mapAttrsToList (name: conf:
mkExporterConf {
inherit name;
inherit (conf) serviceOpts;
conf = cfg.${name};
}) exporterOpts)
);
meta = {
doc = ./exporters.xml;
maintainers = [ maintainers.willibutz ];
};
}
|