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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.dd-agent;
ddConf = pkgs.writeText "datadog.conf" ''
[Main]
dd_url: https://app.datadoghq.com
skip_ssl_validation: no
api_key: ${cfg.api_key}
${optionalString (cfg.hostname != null) "hostname: ${cfg.hostname}"}
collector_log_file: /var/log/datadog/collector.log
forwarder_log_file: /var/log/datadog/forwarder.log
dogstatsd_log_file: /var/log/datadog/dogstatsd.log
pup_log_file: /var/log/datadog/pup.log
# proxy_host: my-proxy.com
# proxy_port: 3128
# proxy_user: user
# proxy_password: password
# tags: mytag0, mytag1
${optionalString (cfg.tags != null ) "tags: ${concatStringsSep ", " cfg.tags }"}
# collect_ec2_tags: no
# recent_point_threshold: 30
# use_mount: no
# listen_port: 17123
# graphite_listen_port: 17124
# non_local_traffic: no
# use_curl_http_client: False
# bind_host: localhost
# use_pup: no
# pup_port: 17125
# pup_interface: localhost
# pup_url: http://localhost:17125
# dogstatsd_port : 8125
# dogstatsd_interval : 10
# dogstatsd_normalize : yes
# statsd_forward_host: address_of_own_statsd_server
# statsd_forward_port: 8125
# device_blacklist_re: .*\/dev\/mapper\/lxc-box.*
# ganglia_host: localhost
# ganglia_port: 8651
'';
diskConfig = pkgs.writeText "disk.yaml" ''
init_config:
instances:
- use_mount: no
'';
networkConfig = pkgs.writeText "network.yaml" ''
init_config:
instances:
# Network check only supports one configured instance
- collect_connection_state: false
excluded_interfaces:
- lo
- lo0
'';
postgresqlConfig = pkgs.writeText "postgres.yaml" cfg.postgresqlConfig;
nginxConfig = pkgs.writeText "nginx.yaml" cfg.nginxConfig;
mongoConfig = pkgs.writeText "mongo.yaml" cfg.mongoConfig;
jmxConfig = pkgs.writeText "jmx.yaml" cfg.jmxConfig;
processConfig = pkgs.writeText "process.yaml" cfg.processConfig;
etcfiles =
let
defaultConfd = import ./dd-agent-defaults.nix;
in
listToAttrs (map (f: {
name = "dd-agent/conf.d/${f}";
value.source = "${pkgs.dd-agent}/agent/conf.d-system/${f}";
}) defaultConfd) //
{
"dd-agent/datadog.conf".source = ddConf;
"dd-agent/conf.d/disk.yaml".source = diskConfig;
"dd-agent/conf.d/network.yaml".source = networkConfig;
} //
(optionalAttrs (cfg.postgresqlConfig != null)
{
"dd-agent/conf.d/postgres.yaml".source = postgresqlConfig;
}) //
(optionalAttrs (cfg.nginxConfig != null)
{
"dd-agent/conf.d/nginx.yaml".source = nginxConfig;
}) //
(optionalAttrs (cfg.mongoConfig != null)
{
"dd-agent/conf.d/mongo.yaml".source = mongoConfig;
}) //
(optionalAttrs (cfg.processConfig != null)
{
"dd-agent/conf.d/process.yaml".source = processConfig;
}) //
(optionalAttrs (cfg.jmxConfig != null)
{
"dd-agent/conf.d/jmx.yaml".source = jmxConfig;
});
in {
options.services.dd-agent = {
enable = mkOption {
description = ''
Whether to enable the dd-agent v5 monitoring service.
For datadog-agent v6, see <option>services.datadog-agent.enable</option>.
'';
default = false;
type = types.bool;
};
api_key = mkOption {
description = ''
The Datadog API key to associate the agent with your account.
Warning: this key is stored in cleartext within the world-readable
Nix store! Consider using the new v6
<option>services.datadog-agent</option> module instead.
'';
example = "ae0aa6a8f08efa988ba0a17578f009ab";
type = types.str;
};
tags = mkOption {
description = "The tags to mark this Datadog agent";
example = [ "test" "service" ];
default = null;
type = types.nullOr (types.listOf types.str);
};
hostname = mkOption {
description = "The hostname to show in the Datadog dashboard (optional)";
default = null;
example = "mymachine.mydomain";
type = types.nullOr types.str;
};
postgresqlConfig = mkOption {
description = "Datadog PostgreSQL integration configuration";
default = null;
type = types.nullOr types.lines;
};
nginxConfig = mkOption {
description = "Datadog nginx integration configuration";
default = null;
type = types.nullOr types.lines;
};
mongoConfig = mkOption {
description = "MongoDB integration configuration";
default = null;
type = types.nullOr types.lines;
};
jmxConfig = mkOption {
description = "JMX integration configuration";
default = null;
type = types.nullOr types.lines;
};
processConfig = mkOption {
description = ''
Process integration configuration
See <link xlink:href="https://docs.datadoghq.com/integrations/process/"/>
'';
default = null;
type = types.nullOr types.lines;
};
};
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.dd-agent pkgs.sysstat pkgs.procps ];
users.users.datadog = {
description = "Datadog Agent User";
uid = config.ids.uids.datadog;
group = "datadog";
home = "/var/log/datadog/";
createHome = true;
};
users.groups.datadog.gid = config.ids.gids.datadog;
systemd.services = let
makeService = attrs: recursiveUpdate {
path = [ pkgs.dd-agent pkgs.python pkgs.sysstat pkgs.procps pkgs.gohai ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
User = "datadog";
Group = "datadog";
Restart = "always";
RestartSec = 2;
PrivateTmp = true;
};
restartTriggers = [ pkgs.dd-agent ddConf diskConfig networkConfig postgresqlConfig nginxConfig mongoConfig jmxConfig processConfig ];
} attrs;
in {
dd-agent = makeService {
description = "Datadog agent monitor";
serviceConfig.ExecStart = "${pkgs.dd-agent}/bin/dd-agent foreground";
};
dogstatsd = makeService {
description = "Datadog statsd";
environment.TMPDIR = "/run/dogstatsd";
serviceConfig = {
ExecStart = "${pkgs.dd-agent}/bin/dogstatsd start";
Type = "forking";
PIDFile = "/run/dogstatsd/dogstatsd.pid";
RuntimeDirectory = "dogstatsd";
};
};
dd-jmxfetch = lib.mkIf (cfg.jmxConfig != null) {
description = "Datadog JMX Fetcher";
path = [ pkgs.dd-agent pkgs.python pkgs.sysstat pkgs.procps pkgs.jdk ];
serviceConfig.ExecStart = "${pkgs.dd-agent}/bin/dd-jmxfetch";
};
};
environment.etc = etcfiles;
};
}
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