428 lines
14 KiB
Nix
428 lines
14 KiB
Nix
{ config, lib, options, pkgs, ... }:
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with lib;
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let
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cfg = config.services.graphite;
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opt = options.services.graphite;
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writeTextOrNull = f: t: mapNullable (pkgs.writeTextDir f) t;
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dataDir = cfg.dataDir;
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staticDir = cfg.dataDir + "/static";
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graphiteLocalSettingsDir = pkgs.runCommand "graphite_local_settings" {
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inherit graphiteLocalSettings;
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preferLocalBuild = true;
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} ''
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mkdir -p $out
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ln -s $graphiteLocalSettings $out/graphite_local_settings.py
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'';
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graphiteLocalSettings = pkgs.writeText "graphite_local_settings.py" (
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"STATIC_ROOT = '${staticDir}'\n" +
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optionalString (config.time.timeZone != null) "TIME_ZONE = '${config.time.timeZone}'\n"
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+ cfg.web.extraConfig
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);
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seyrenConfig = {
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SEYREN_URL = cfg.seyren.seyrenUrl;
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MONGO_URL = cfg.seyren.mongoUrl;
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GRAPHITE_URL = cfg.seyren.graphiteUrl;
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} // cfg.seyren.extraConfig;
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configDir = pkgs.buildEnv {
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name = "graphite-config";
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paths = lists.filter (el: el != null) [
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(writeTextOrNull "carbon.conf" cfg.carbon.config)
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(writeTextOrNull "storage-aggregation.conf" cfg.carbon.storageAggregation)
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(writeTextOrNull "storage-schemas.conf" cfg.carbon.storageSchemas)
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(writeTextOrNull "blacklist.conf" cfg.carbon.blacklist)
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(writeTextOrNull "whitelist.conf" cfg.carbon.whitelist)
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(writeTextOrNull "rewrite-rules.conf" cfg.carbon.rewriteRules)
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(writeTextOrNull "relay-rules.conf" cfg.carbon.relayRules)
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(writeTextOrNull "aggregation-rules.conf" cfg.carbon.aggregationRules)
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];
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};
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carbonOpts = name: with config.ids; ''
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--nodaemon --syslog --prefix=${name} --pidfile /run/${name}/${name}.pid ${name}
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'';
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carbonEnv = {
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PYTHONPATH = let
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cenv = pkgs.python3.buildEnv.override {
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extraLibs = [ pkgs.python3Packages.carbon ];
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};
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in "${cenv}/${pkgs.python3.sitePackages}";
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GRAPHITE_ROOT = dataDir;
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GRAPHITE_CONF_DIR = configDir;
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GRAPHITE_STORAGE_DIR = dataDir;
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};
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in {
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imports = [
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(mkRemovedOptionModule ["services" "graphite" "api"] "")
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(mkRemovedOptionModule ["services" "graphite" "beacon"] "")
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(mkRemovedOptionModule ["services" "graphite" "pager"] "")
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];
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###### interface
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options.services.graphite = {
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dataDir = mkOption {
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type = types.path;
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default = "/var/db/graphite";
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description = lib.mdDoc ''
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Data directory for graphite.
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'';
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};
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web = {
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enable = mkOption {
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description = lib.mdDoc "Whether to enable graphite web frontend.";
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default = false;
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type = types.bool;
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};
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listenAddress = mkOption {
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description = lib.mdDoc "Graphite web frontend listen address.";
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default = "127.0.0.1";
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type = types.str;
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};
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port = mkOption {
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description = lib.mdDoc "Graphite web frontend port.";
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default = 8080;
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type = types.int;
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};
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extraConfig = mkOption {
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type = types.str;
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default = "";
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description = lib.mdDoc ''
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Graphite webapp settings. See:
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<http://graphite.readthedocs.io/en/latest/config-local-settings.html>
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'';
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};
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};
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carbon = {
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config = mkOption {
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description = lib.mdDoc "Content of carbon configuration file.";
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default = ''
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[cache]
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# Listen on localhost by default for security reasons
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UDP_RECEIVER_INTERFACE = 127.0.0.1
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PICKLE_RECEIVER_INTERFACE = 127.0.0.1
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LINE_RECEIVER_INTERFACE = 127.0.0.1
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CACHE_QUERY_INTERFACE = 127.0.0.1
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# Do not log every update
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LOG_UPDATES = False
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LOG_CACHE_HITS = False
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'';
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type = types.str;
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};
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enableCache = mkOption {
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description = lib.mdDoc "Whether to enable carbon cache, the graphite storage daemon.";
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default = false;
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type = types.bool;
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};
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storageAggregation = mkOption {
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description = lib.mdDoc "Defines how to aggregate data to lower-precision retentions.";
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default = null;
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type = types.nullOr types.str;
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example = ''
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[all_min]
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pattern = \.min$
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xFilesFactor = 0.1
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aggregationMethod = min
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'';
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};
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storageSchemas = mkOption {
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description = lib.mdDoc "Defines retention rates for storing metrics.";
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default = "";
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type = types.nullOr types.str;
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example = ''
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[apache_busyWorkers]
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pattern = ^servers\.www.*\.workers\.busyWorkers$
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retentions = 15s:7d,1m:21d,15m:5y
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'';
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};
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blacklist = mkOption {
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description = lib.mdDoc "Any metrics received which match one of the experssions will be dropped.";
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default = null;
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type = types.nullOr types.str;
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example = "^some\\.noisy\\.metric\\.prefix\\..*";
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};
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whitelist = mkOption {
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description = lib.mdDoc "Only metrics received which match one of the experssions will be persisted.";
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default = null;
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type = types.nullOr types.str;
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example = ".*";
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};
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rewriteRules = mkOption {
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description = lib.mdDoc ''
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Regular expression patterns that can be used to rewrite metric names
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in a search and replace fashion.
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'';
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default = null;
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type = types.nullOr types.str;
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example = ''
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[post]
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_sum$ =
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_avg$ =
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'';
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};
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enableRelay = mkOption {
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description = lib.mdDoc "Whether to enable carbon relay, the carbon replication and sharding service.";
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default = false;
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type = types.bool;
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};
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relayRules = mkOption {
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description = lib.mdDoc "Relay rules are used to send certain metrics to a certain backend.";
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default = null;
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type = types.nullOr types.str;
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example = ''
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[example]
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pattern = ^mydata\.foo\..+
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servers = 10.1.2.3, 10.1.2.4:2004, myserver.mydomain.com
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'';
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};
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enableAggregator = mkOption {
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description = lib.mdDoc "Whether to enable carbon aggregator, the carbon buffering service.";
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default = false;
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type = types.bool;
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};
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aggregationRules = mkOption {
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description = lib.mdDoc "Defines if and how received metrics will be aggregated.";
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default = null;
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type = types.nullOr types.str;
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example = ''
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<env>.applications.<app>.all.requests (60) = sum <env>.applications.<app>.*.requests
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<env>.applications.<app>.all.latency (60) = avg <env>.applications.<app>.*.latency
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'';
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};
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};
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seyren = {
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enable = mkOption {
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description = lib.mdDoc "Whether to enable seyren service.";
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default = false;
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type = types.bool;
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};
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port = mkOption {
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description = lib.mdDoc "Seyren listening port.";
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default = 8081;
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type = types.int;
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};
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seyrenUrl = mkOption {
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default = "http://localhost:${toString cfg.seyren.port}/";
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defaultText = literalExpression ''"http://localhost:''${toString config.${opt.seyren.port}}/"'';
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description = lib.mdDoc "Host where seyren is accessible.";
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type = types.str;
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};
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graphiteUrl = mkOption {
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default = "http://${cfg.web.listenAddress}:${toString cfg.web.port}";
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defaultText = literalExpression ''"http://''${config.${opt.web.listenAddress}}:''${toString config.${opt.web.port}}"'';
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description = lib.mdDoc "Host where graphite service runs.";
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type = types.str;
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};
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mongoUrl = mkOption {
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default = "mongodb://${config.services.mongodb.bind_ip}:27017/seyren";
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defaultText = literalExpression ''"mongodb://''${config.services.mongodb.bind_ip}:27017/seyren"'';
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description = lib.mdDoc "Mongodb connection string.";
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type = types.str;
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};
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extraConfig = mkOption {
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default = {};
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description = lib.mdDoc ''
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Extra seyren configuration. See
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<https://github.com/scobal/seyren#config>
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'';
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type = types.attrsOf types.str;
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example = literalExpression ''
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{
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GRAPHITE_USERNAME = "user";
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GRAPHITE_PASSWORD = "pass";
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}
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'';
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};
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};
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};
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###### implementation
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config = mkMerge [
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(mkIf cfg.carbon.enableCache {
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systemd.services.carbonCache = let name = "carbon-cache"; in {
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description = "Graphite Data Storage Backend";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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environment = carbonEnv;
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serviceConfig = {
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RuntimeDirectory = name;
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ExecStart = "${pkgs.python3Packages.twisted}/bin/twistd ${carbonOpts name}";
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User = "graphite";
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Group = "graphite";
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PermissionsStartOnly = true;
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PIDFile="/run/${name}/${name}.pid";
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};
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preStart = ''
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install -dm0700 -o graphite -g graphite ${cfg.dataDir}
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install -dm0700 -o graphite -g graphite ${cfg.dataDir}/whisper
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'';
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};
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})
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(mkIf cfg.carbon.enableAggregator {
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systemd.services.carbonAggregator = let name = "carbon-aggregator"; in {
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enable = cfg.carbon.enableAggregator;
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description = "Carbon Data Aggregator";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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environment = carbonEnv;
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serviceConfig = {
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RuntimeDirectory = name;
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ExecStart = "${pkgs.python3Packages.twisted}/bin/twistd ${carbonOpts name}";
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User = "graphite";
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Group = "graphite";
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PIDFile="/run/${name}/${name}.pid";
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};
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};
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})
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(mkIf cfg.carbon.enableRelay {
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systemd.services.carbonRelay = let name = "carbon-relay"; in {
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description = "Carbon Data Relay";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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environment = carbonEnv;
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serviceConfig = {
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RuntimeDirectory = name;
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ExecStart = "${pkgs.python3Packages.twisted}/bin/twistd ${carbonOpts name}";
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User = "graphite";
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Group = "graphite";
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PIDFile="/run/${name}/${name}.pid";
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};
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};
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})
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(mkIf (cfg.carbon.enableCache || cfg.carbon.enableAggregator || cfg.carbon.enableRelay) {
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environment.systemPackages = [
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pkgs.python3Packages.carbon
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];
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})
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(mkIf cfg.web.enable ({
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systemd.services.graphiteWeb = {
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description = "Graphite Web Interface";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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path = [ pkgs.perl ];
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environment = {
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PYTHONPATH = let
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penv = pkgs.python3.buildEnv.override {
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extraLibs = [
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pkgs.python3Packages.graphite-web
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];
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};
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penvPack = "${penv}/${pkgs.python3.sitePackages}";
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in concatStringsSep ":" [
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"${graphiteLocalSettingsDir}"
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"${penvPack}"
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# explicitly adding pycairo in path because it cannot be imported via buildEnv
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"${pkgs.python3Packages.pycairo}/${pkgs.python3.sitePackages}"
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];
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DJANGO_SETTINGS_MODULE = "graphite.settings";
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GRAPHITE_SETTINGS_MODULE = "graphite_local_settings";
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GRAPHITE_CONF_DIR = configDir;
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GRAPHITE_STORAGE_DIR = dataDir;
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LD_LIBRARY_PATH = "${pkgs.cairo.out}/lib";
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};
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serviceConfig = {
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ExecStart = ''
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${pkgs.python3Packages.waitress-django}/bin/waitress-serve-django \
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--host=${cfg.web.listenAddress} --port=${toString cfg.web.port}
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'';
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User = "graphite";
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Group = "graphite";
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PermissionsStartOnly = true;
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};
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preStart = ''
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if ! test -e ${dataDir}/db-created; then
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mkdir -p ${dataDir}/{whisper/,log/webapp/}
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chmod 0700 ${dataDir}/{whisper/,log/webapp/}
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${pkgs.python3Packages.django}/bin/django-admin.py migrate --noinput
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chown -R graphite:graphite ${dataDir}
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touch ${dataDir}/db-created
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fi
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# Only collect static files when graphite_web changes.
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if ! [ "${dataDir}/current_graphite_web" -ef "${pkgs.python3Packages.graphite-web}" ]; then
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mkdir -p ${staticDir}
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${pkgs.python3Packages.django}/bin/django-admin.py collectstatic --noinput --clear
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chown -R graphite:graphite ${staticDir}
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ln -sfT "${pkgs.python3Packages.graphite-web}" "${dataDir}/current_graphite_web"
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fi
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'';
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};
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environment.systemPackages = [ pkgs.python3Packages.graphite-web ];
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}))
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(mkIf cfg.seyren.enable {
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systemd.services.seyren = {
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description = "Graphite Alerting Dashboard";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" "mongodb.service" ];
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environment = seyrenConfig;
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serviceConfig = {
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ExecStart = "${pkgs.seyren}/bin/seyren -httpPort ${toString cfg.seyren.port}";
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WorkingDirectory = dataDir;
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User = "graphite";
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Group = "graphite";
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};
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preStart = ''
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if ! test -e ${dataDir}/db-created; then
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mkdir -p ${dataDir}
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chown graphite:graphite ${dataDir}
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fi
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'';
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};
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services.mongodb.enable = mkDefault true;
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})
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(mkIf (
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cfg.carbon.enableCache || cfg.carbon.enableAggregator || cfg.carbon.enableRelay ||
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cfg.web.enable || cfg.seyren.enable
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) {
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users.users.graphite = {
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uid = config.ids.uids.graphite;
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group = "graphite";
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description = "Graphite daemon user";
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home = dataDir;
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};
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users.groups.graphite.gid = config.ids.gids.graphite;
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})
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];
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}
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