diff options
Diffstat (limited to 'nixos/modules/services/monitoring/prometheus/exporters.nix')
| -rw-r--r-- | nixos/modules/services/monitoring/prometheus/exporters.nix | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix new file mode 100644 index 00000000000..41302d6d3ce --- /dev/null +++ b/nixos/modules/services/monitoring/prometheus/exporters.nix @@ -0,0 +1,303 @@ +{ config, pkgs, lib, options, ... }: + +let + inherit (lib) concatStrings foldl foldl' genAttrs literalExpression maintainers + mapAttrsToList mkDefault mkEnableOption mkIf mkMerge mkOption + optional types mkOptionDefault flip attrNames; + + 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 = genAttrs [ + "apcupsd" + "artifactory" + "bind" + "bird" + "bitcoin" + "blackbox" + "buildkite-agent" + "collectd" + "dmarc" + "dnsmasq" + "domain" + "dovecot" + "fastly" + "fritzbox" + "influxdb" + "json" + "jitsi" + "kea" + "keylight" + "knot" + "lnd" + "mail" + "mikrotik" + "minio" + "modemmanager" + "nextcloud" + "nginx" + "nginxlog" + "node" + "openldap" + "openvpn" + "pihole" + "postfix" + "postgres" + "process" + "pve" + "py-air-control" + "redis" + "rspamd" + "rtl_433" + "script" + "snmp" + "smartctl" + "smokeping" + "sql" + "surfboard" + "systemd" + "tor" + "unbound" + "unifi" + "unifi-poller" + "varnish" + "wireguard" + "flow" + ] (name: + import (./. + "/exporters/${name}.nix") { inherit config lib pkgs options; } + ); + + mkExporterOpts = ({ name, port }: { + enable = mkEnableOption "the prometheus ${name} exporter"; + port = mkOption { + type = types.port; + 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.nullOr types.str; + default = null; + example = literalExpression '' + "-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 = "${name}-exporter"; + description = '' + User name under which the ${name} exporter shall be run. + ''; + }; + group = mkOption { + type = types.str; + default = "${name}-exporter"; + description = '' + Group under which the ${name} exporter shall be run. + ''; + }; + }); + + mkSubModule = { name, port, extraOpts, imports }: { + ${name} = mkOption { + type = types.submodule [{ + inherit imports; + options = (mkExporterOpts { + inherit name port; + } // extraOpts); + } ({ config, ... }: mkIf config.openFirewall { + firewallFilter = mkDefault "-p tcp -m tcp --dport ${toString config.port}"; + })]; + internal = true; + default = {}; + }; + }; + + mkSubModules = (foldl' (a: b: a//b) {} + (mapAttrsToList (name: opts: mkSubModule { + inherit name; + inherit (opts) port; + extraOpts = opts.extraOpts or {}; + imports = opts.imports or []; + }) exporterOpts) + ); + + mkExporterConf = { name, conf, serviceOpts }: + let + enableDynamicUser = serviceOpts.serviceConfig.DynamicUser or true; + in + mkIf conf.enable { + warnings = conf.warnings or []; + users.users."${name}-exporter" = (mkIf (conf.user == "${name}-exporter" && !enableDynamicUser) { + description = "Prometheus ${name} exporter service user"; + isSystemUser = true; + inherit (conf) group; + }); + users.groups = (mkIf (conf.group == "${name}-exporter" && !enableDynamicUser) { + "${name}-exporter" = {}; + }); + 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; + serviceConfig.DynamicUser = mkDefault enableDynamicUser; + serviceConfig.User = mkDefault conf.user; + serviceConfig.Group = conf.group; + # Hardening + serviceConfig.CapabilityBoundingSet = mkDefault [ "" ]; + serviceConfig.DeviceAllow = [ "" ]; + serviceConfig.LockPersonality = true; + serviceConfig.MemoryDenyWriteExecute = true; + serviceConfig.NoNewPrivileges = true; + serviceConfig.PrivateDevices = true; + serviceConfig.ProtectClock = mkDefault true; + serviceConfig.ProtectControlGroups = true; + serviceConfig.ProtectHome = true; + serviceConfig.ProtectHostname = true; + serviceConfig.ProtectKernelLogs = true; + serviceConfig.ProtectKernelModules = true; + serviceConfig.ProtectKernelTunables = true; + serviceConfig.ProtectSystem = mkDefault "strict"; + serviceConfig.RemoveIPC = true; + serviceConfig.RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ]; + serviceConfig.RestrictNamespaces = true; + serviceConfig.RestrictRealtime = true; + serviceConfig.RestrictSUIDSGID = true; + serviceConfig.SystemCallArchitectures = "native"; + serviceConfig.UMask = "0077"; + } serviceOpts ]); + }; +in +{ + + imports = (lib.forEach [ "blackboxExporter" "collectdExporter" "fritzboxExporter" + "jsonExporter" "minioExporter" "nginxExporter" "nodeExporter" + "snmpExporter" "unifiExporter" "varnishExporter" ] + (opt: lib.mkRemovedOptionModule [ "services" "prometheus" "${opt}" ] '' + The prometheus exporters are now configured using `services.prometheus.exporters'. + See the 18.03 release notes for more information. + '' )); + + options.services.prometheus.exporters = mkOption { + type = types.submodule { + options = (mkSubModules); + }; + description = "Prometheus exporter configuration"; + default = {}; + example = literalExpression '' + { + node = { + enable = true; + enabledCollectors = [ "systemd" ]; + }; + varnish.enable = true; + } + ''; + }; + + config = mkMerge ([{ + assertions = [ { + assertion = cfg.snmp.enable -> ( + (cfg.snmp.configurationPath == null) != (cfg.snmp.configuration == null) + ); + message = '' + Please ensure you have either `services.prometheus.exporters.snmp.configuration' + or `services.prometheus.exporters.snmp.configurationPath' set! + ''; + } { + assertion = cfg.mikrotik.enable -> ( + (cfg.mikrotik.configFile == null) != (cfg.mikrotik.configuration == null) + ); + message = '' + Please specify either `services.prometheus.exporters.mikrotik.configuration' + or `services.prometheus.exporters.mikrotik.configFile'. + ''; + } { + assertion = cfg.mail.enable -> ( + (cfg.mail.configFile == null) != (cfg.mail.configuration == null) + ); + message = '' + Please specify either 'services.prometheus.exporters.mail.configuration' + or 'services.prometheus.exporters.mail.configFile'. + ''; + } { + assertion = cfg.sql.enable -> ( + (cfg.sql.configFile == null) != (cfg.sql.configuration == null) + ); + message = '' + Please specify either 'services.prometheus.exporters.sql.configuration' or + 'services.prometheus.exporters.sql.configFile' + ''; + } ] ++ (flip map (attrNames cfg) (exporter: { + assertion = cfg.${exporter}.firewallFilter != null -> cfg.${exporter}.openFirewall; + message = '' + The `firewallFilter'-option of exporter ${exporter} doesn't have any effect unless + `openFirewall' is set to `true'! + ''; + })); + }] ++ [(mkIf config.services.minio.enable { + services.prometheus.exporters.minio.minioAddress = mkDefault "http://localhost:9000"; + services.prometheus.exporters.minio.minioAccessKey = mkDefault config.services.minio.accessKey; + services.prometheus.exporters.minio.minioAccessSecret = mkDefault config.services.minio.secretKey; + })] ++ [(mkIf config.services.prometheus.exporters.rtl_433.enable { + hardware.rtl-sdr.enable = mkDefault true; + })] ++ [(mkIf config.services.postfix.enable { + services.prometheus.exporters.postfix.group = mkDefault config.services.postfix.setgidGroup; + })] ++ (mapAttrsToList (name: conf: + mkExporterConf { + inherit name; + inherit (conf) serviceOpts; + conf = cfg.${name}; + }) exporterOpts) + ); + + meta = { + doc = ./exporters.xml; + maintainers = [ maintainers.willibutz ]; + }; +} |