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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.statsd;
configFile = pkgs.writeText "statsd.conf" ''
{
address: "${cfg.host}",
port: "${toString cfg.port}",
mgmt_address: "${cfg.mgmt_address}",
mgmt_port: "${toString cfg.mgmt_port}",
backends: [${concatMapStringsSep "," (el: if (nixType el) == "string" then ''"./backends/${el}"'' else ''"${head el.names}"'') cfg.backends}],
${optionalString (cfg.graphiteHost!=null) ''graphiteHost: "${cfg.graphiteHost}",''}
${optionalString (cfg.graphitePort!=null) ''graphitePort: "${toString cfg.graphitePort}",''}
console: {
prettyprint: false
},
log: {
backend: "syslog"
},
automaticConfigReload: false${optionalString (cfg.extraConfig != null) ","}
${cfg.extraConfig}
}
'';
in
{
###### interface
options.services.statsd = {
enable = mkOption {
description = "Whether to enable statsd stats aggregation service";
default = false;
type = types.uniq types.bool;
};
host = mkOption {
description = "Address that statsd listens on over UDP";
default = "127.0.0.1";
type = types.str;
};
port = mkOption {
description = "Port that stats listens for messages on over UDP";
default = 8125;
type = types.uniq types.int;
};
mgmt_address = mkOption {
description = "Address to run management TCP interface on";
default = "127.0.0.1";
type = types.str;
};
mgmt_port = mkOption {
description = "Port to run the management TCP interface on";
default = 8126;
type = types.uniq types.int;
};
backends = mkOption {
description = "List of backends statsd will use for data persistence";
default = ["graphite"];
example = ["graphite" pkgs.nodePackages."statsd-influxdb-backend"];
type = types.listOf (types.either types.str types.package);
};
graphiteHost = mkOption {
description = "Hostname or IP of Graphite server";
default = null;
type = types.nullOr types.str;
};
graphitePort = mkOption {
description = "Port of Graphite server (i.e. carbon-cache).";
default = null;
type = types.nullOr types.int;
};
extraConfig = mkOption {
description = "Extra configuration options for statsd";
default = "";
type = types.nullOr types.str;
};
};
###### implementation
config = mkIf cfg.enable {
users.extraUsers = singleton {
name = "statsd";
uid = config.ids.uids.statsd;
description = "Statsd daemon user";
};
systemd.services.statsd = {
description = "Statsd Server";
wantedBy = [ "multi-user.target" ];
environment = {
NODE_PATH=concatMapStringsSep ":" (el: "${el}/lib/node_modules") (filter (el: (nixType el) != "string") cfg.backends);
};
serviceConfig = {
ExecStart = "${pkgs.nodePackages.statsd}/bin/statsd ${configFile}";
User = "statsd";
};
};
environment.systemPackages = [pkgs.nodePackages.statsd];
};
}
|