368a677c97
This overhauls the Datadog module a bit to be much more useful. In particular, it adds support for nginx and postgresql monitoring integrations to dd-agent. These have to exist in separate files under /etc/dd-agent, so the module just exposes then as separate options. In the future, more integrations could be added this way. In the process of doing this, I also had to rename the dd-agent user to datadog. Note the UIDs did not change, so this is strictly backwards compatible. The reason for this is to make it easier to create a 'datadog' postgres user with access to pg_stats, as 'dd-agent' typically isn't a valid username. This allows the out of the box configurations to be used. Signed-off-by: Austin Seipp <aseipp@pobox.com>
149 lines
4.1 KiB
Nix
149 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.dd-agent;
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ddConf = pkgs.writeText "datadog.conf" ''
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[Main]
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dd_url: https://app.datadoghq.com
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skip_ssl_validation: no
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api_key: ${cfg.api_key}
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${optionalString (cfg.hostname != null) "hostname: ${cfg.hostname}"}
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collector_log_file: /var/log/datadog/collector.log
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forwarder_log_file: /var/log/datadog/forwarder.log
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dogstatsd_log_file: /var/log/datadog/dogstatsd.log
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pup_log_file: /var/log/datadog/pup.log
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# proxy_host: my-proxy.com
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# proxy_port: 3128
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# proxy_user: user
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# proxy_password: password
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# tags: mytag0, mytag1
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# collect_ec2_tags: no
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# recent_point_threshold: 30
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# use_mount: no
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# listen_port: 17123
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# graphite_listen_port: 17124
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# non_local_traffic: no
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# use_curl_http_client: False
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# bind_host: localhost
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# use_pup: no
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# pup_port: 17125
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# pup_interface: localhost
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# pup_url: http://localhost:17125
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# dogstatsd_port : 8125
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# dogstatsd_interval : 10
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# dogstatsd_normalize : yes
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# statsd_forward_host: address_of_own_statsd_server
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# statsd_forward_port: 8125
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# device_blacklist_re: .*\/dev\/mapper\/lxc-box.*
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# ganglia_host: localhost
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# ganglia_port: 8651
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'';
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postgresqlConfig = pkgs.writeText "postgres.yaml" cfg.postgresqlConfig;
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nginxConfig = pkgs.writeText "nginx.yaml" cfg.nginxConfig;
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etcfiles =
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[ { source = ddConf;
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target = "dd-agent/datadog.conf";
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} ] ++
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(optional (cfg.postgresqlConfig != null)
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{ source = postgresqlConfig;
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target = "dd-agent/conf.d/postgres.yaml";
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}) ++
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(optional (cfg.nginxConfig != null)
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{ source = nginxConfig;
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target = "dd-agent/conf.d/nginx.yaml";
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});
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in {
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options.services.dd-agent = {
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enable = mkOption {
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description = "Whether to enable the dd-agent montioring service";
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default = false;
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type = types.bool;
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};
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api_key = mkOption {
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description = "The Datadog API key to associate the agent with your account";
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example = "ae0aa6a8f08efa988ba0a17578f009ab";
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type = 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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postgresqlConfig = mkOption {
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description = "Datadog PostgreSQL integration configuration";
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default = null;
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type = types.uniq (types.nullOr types.string);
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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.uniq (types.nullOr types.string);
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkgs."dd-agent" 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.dd-agent = {
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description = "Datadog agent monitor";
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path = [ pkgs."dd-agent" pkgs.python pkgs.sysstat pkgs.procps];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${pkgs.dd-agent}/bin/dd-agent foreground";
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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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};
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restartTriggers = [ pkgs.dd-agent ddConf postgresqlConfig nginxConfig ];
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};
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systemd.services.dogstatsd = {
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description = "Datadog statsd";
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path = [ pkgs."dd-agent" pkgs.python ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${pkgs.dd-agent}/bin/dogstatsd start";
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User = "datadog";
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Group = "datadog";
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Type = "forking";
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PIDFile = "/tmp/dogstatsd.pid";
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Restart = "always";
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RestartSec = 2;
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};
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restartTriggers = [ pkgs.dd-agent ddConf postgresqlConfig nginxConfig ];
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};
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environment.etc = etcfiles;
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};
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}
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