nixos/datadog-agent: add module
This is the new v6 version of datadog-agent. The old v5 module is kept as dd-agent.
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2 changed files with 202 additions and 0 deletions
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@ -407,6 +407,7 @@
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./services/monitoring/cadvisor.nix
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./services/monitoring/collectd.nix
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./services/monitoring/das_watchdog.nix
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./services/monitoring/datadog-agent.nix
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./services/monitoring/dd-agent/dd-agent.nix
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./services/monitoring/fusion-inventory.nix
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./services/monitoring/grafana.nix
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201
nixos/modules/services/monitoring/datadog-agent.nix
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201
nixos/modules/services/monitoring/datadog-agent.nix
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@ -0,0 +1,201 @@
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.datadog-agent;
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ddConf = {
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dd_url = "https://app.datadoghq.com";
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skip_ssl_validation = "no";
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api_key = "";
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confd_path = "/etc/datadog-agent/conf.d";
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additional_checksd = "/etc/datadog-agent/checks.d";
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use_dogstatsd = "yes";
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}
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// optionalAttrs (cfg.logLevel != null) { log_level = cfg.logLevel; }
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// optionalAttrs (cfg.hostname != null) { inherit (cfg) hostname; }
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// optionalAttrs (cfg.tags != null ) { tags = concatStringsSep ", " cfg.tags; }
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// cfg.extraConfig;
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makeConfigDir = entries: mapAttrsToList (name: conf: {
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source = pkgs.writeText (baseNameOf name) (builtins.toJSON conf);
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target = "datadog-agent/" + name;
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}) (filterAttrs (name: conf: conf != null) entries);
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etcfiles = makeConfigDir
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{ "datadog.yaml" = ddConf;
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"conf.d/disk.yaml" = cfg.diskConfig;
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"conf.d/network.yaml" = cfg.networkConfig;
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"conf.d/postgres.d/conf.yaml" = cfg.postgresqlConfig;
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"conf.d/nginx.d/conf.yaml" = cfg.nginxConfig;
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"conf.d/mongo.d/conf.yaml" = cfg.mongoConfig;
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"conf.d/process.yaml" = cfg.processConfig;
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"conf.d/jmx.yaml" = cfg.jmxConfig;
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};
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in {
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options.services.datadog-agent = {
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enable = mkOption {
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description = ''
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Whether to enable the datadog-agent v6 monitoring service
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'';
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default = false;
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type = types.bool;
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};
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package = mkOption {
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default = pkgs.datadog-agent;
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defaultText = "pkgs.datadog-agent";
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description = ''
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Which DataDog v6 agent package to use.
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Override the <literal>pythonPackages</literal> argument
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of this derivation to include more checks.
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'';
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type = types.package;
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};
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apiKeyFile = mkOption {
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description = ''
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Path to a file containing the Datadog API key to associate the
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agent with your account.
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'';
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example = "/run/keys/datadog_api_key";
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type = types.path;
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};
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tags = mkOption {
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description = "The tags to mark this Datadog agent";
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example = [ "test" "service" ];
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default = null;
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type = types.nullOr (types.listOf types.str);
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};
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hostname = mkOption {
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description = "The hostname to show in the Datadog dashboard (optional)";
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default = null;
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example = "mymachine.mydomain";
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type = types.uniq (types.nullOr types.string);
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};
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logLevel = mkOption {
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description = "Logging verbosity.";
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default = null;
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type = types.nullOr (types.enum ["DEBUG" "INFO" "WARN" "ERROR"]);
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};
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extraConfig = mkOption {
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default = {};
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type = types.attrs;
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description = ''
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Extra configuration options that will be merged into the
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main config file <filename>datadog.yaml</filename>.
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'';
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};
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diskConfig = mkOption {
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description = "Disk check config";
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type = types.attrs;
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default = {
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init_config = {};
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instances = [ { use-mount = "no"; } ];
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};
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};
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networkConfig = mkOption {
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description = "Network check config";
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type = types.attrs;
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default = {
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init_config = {};
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# Network check only supports one configured instance
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instances = [ { collect_connection_state = false;
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excluded_interfaces = [ "lo" "lo0" ]; } ];
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};
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};
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postgresqlConfig = mkOption {
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description = "Datadog PostgreSQL integration configuration";
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default = null;
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type = types.nullOr types.attrs;
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};
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nginxConfig = mkOption {
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description = "Datadog nginx integration configuration";
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default = null;
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type = types.nullOr types.attrs;
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};
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mongoConfig = mkOption {
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description = "MongoDB integration configuration";
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default = null;
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type = types.nullOr types.attrs;
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};
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jmxConfig = mkOption {
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description = "JMX integration configuration";
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default = null;
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type = types.nullOr types.attrs;
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};
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processConfig = mkOption {
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description = ''
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Process integration configuration
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See http://docs.datadoghq.com/integrations/process/
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'';
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default = null;
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type = types.nullOr types.attrs;
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [ cfg.package pkgs.sysstat pkgs.procps ];
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users.extraUsers.datadog = {
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description = "Datadog Agent User";
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uid = config.ids.uids.datadog;
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group = "datadog";
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home = "/var/log/datadog/";
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createHome = true;
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};
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users.extraGroups.datadog.gid = config.ids.gids.datadog;
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systemd.services = let
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makeService = attrs: recursiveUpdate {
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path = [ cfg.package pkgs.python pkgs.sysstat pkgs.procps ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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User = "datadog";
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Group = "datadog";
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Restart = "always";
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RestartSec = 2;
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PrivateTmp = true;
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};
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restartTriggers = [ cfg.package ] ++ map (etc: etc.source) etcfiles;
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} attrs;
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in {
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datadog-agent = makeService {
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description = "Datadog agent monitor";
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preStart = ''
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chown -R datadog: /etc/datadog-agent
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rm -f /etc/datadog-agent/auth_token
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'';
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script = ''
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export DD_API_KEY=$(head -n1 ${cfg.apiKeyFile})
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exec ${cfg.package}/bin/agent start -c /etc/datadog-agent/datadog.yaml
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'';
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serviceConfig.PermissionsStartOnly = true;
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};
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dd-jmxfetch = lib.mkIf (cfg.jmxConfig != null) (makeService {
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description = "Datadog JMX Fetcher";
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path = [ cfg.package pkgs.python pkgs.sysstat pkgs.procps pkgs.jdk ];
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serviceConfig.ExecStart = "${cfg.package}/bin/dd-jmxfetch";
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});
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};
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environment.etc = etcfiles;
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};
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}
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