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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
'';
postgresqlConfig = pkgs.writeText "postgres.yaml" cfg.postgresqlConfig;
nginxConfig = pkgs.writeText "nginx.yaml" cfg.nginxConfig;
etcfiles =
[ { source = ddConf;
target = "dd-agent/datadog.conf";
} ] ++
(optional (cfg.postgresqlConfig != null)
{ source = postgresqlConfig;
target = "dd-agent/conf.d/postgres.yaml";
}) ++
(optional (cfg.nginxConfig != null)
{ source = nginxConfig;
target = "dd-agent/conf.d/nginx.yaml";
});
in {
options.services.dd-agent = {
enable = mkOption {
description = "Whether to enable the dd-agent montioring service";
default = false;
type = types.bool;
};
api_key = mkOption {
description = "The Datadog API key to associate the agent with your account";
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.uniq (types.nullOr types.string);
};
postgresqlConfig = mkOption {
description = "Datadog PostgreSQL integration configuration";
default = null;
type = types.uniq (types.nullOr types.string);
};
nginxConfig = mkOption {
description = "Datadog nginx integration configuration";
default = null;
type = types.uniq (types.nullOr types.string);
};
};
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs."dd-agent" pkgs.sysstat pkgs.procps ];
users.extraUsers.datadog = {
description = "Datadog Agent User";
uid = config.ids.uids.datadog;
group = "datadog";
home = "/var/log/datadog/";
createHome = true;
};
users.extraGroups.datadog.gid = config.ids.gids.datadog;
systemd.services.dd-agent = {
description = "Datadog agent monitor";
path = [ pkgs."dd-agent" pkgs.python pkgs.sysstat pkgs.procps];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = "${pkgs.dd-agent}/bin/dd-agent foreground";
User = "datadog";
Group = "datadog";
Restart = "always";
RestartSec = 2;
};
restartTriggers = [ pkgs.dd-agent ddConf postgresqlConfig nginxConfig ];
};
systemd.services.dogstatsd = {
description = "Datadog statsd";
path = [ pkgs."dd-agent" pkgs.python pkgs.procps ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = "${pkgs.dd-agent}/bin/dogstatsd start";
User = "datadog";
Group = "datadog";
Type = "forking";
PIDFile = "/tmp/dogstatsd.pid";
Restart = "always";
RestartSec = 2;
};
environment.SSL_CERT_FILE = "/etc/ssl/certs/ca-bundle.crt";
restartTriggers = [ pkgs.dd-agent ddConf postgresqlConfig nginxConfig ];
};
environment.etc = etcfiles;
};
}
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