154 lines
3.9 KiB
Nix
154 lines
3.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.elasticsearch;
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esConfig = ''
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network.host: ${cfg.host}
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network.port: ${toString cfg.port}
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network.tcp.port: ${toString cfg.tcp_port}
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cluster.name: ${cfg.cluster_name}
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${cfg.extraConf}
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'';
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configDir = pkgs.buildEnv {
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name = "elasticsearch-config";
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paths = [
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(pkgs.writeTextDir "elasticsearch.yml" esConfig)
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(pkgs.writeTextDir "logging.yml" cfg.logging)
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];
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};
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esPlugins = pkgs.buildEnv {
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name = "elasticsearch-plugins";
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paths = cfg.plugins;
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};
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in {
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###### interface
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options.services.elasticsearch = {
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enable = mkOption {
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description = "Whether to enable elasticsearch.";
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default = false;
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type = types.uniq types.bool;
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};
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host = mkOption {
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description = "Elasticsearch 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 = "Elasticsearch port to listen for HTTP traffic.";
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default = 9200;
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type = types.int;
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};
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tcp_port = mkOption {
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description = "Elasticsearch port for the node to node communication.";
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default = 9300;
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type = types.int;
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};
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cluster_name = mkOption {
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description = "Elasticsearch name that identifies your cluster for auto-discovery.";
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default = "elasticsearch";
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type = types.str;
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};
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extraConf = mkOption {
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description = "Extra configuration for elasticsearch.";
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default = "";
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type = types.str;
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example = ''
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node.name: "elasticsearch"
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node.master: true
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node.data: false
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index.number_of_shards: 5
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index.number_of_replicas: 1
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'';
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};
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logging = mkOption {
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description = "Elasticsearch logging configuration.";
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default = ''
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rootLogger: INFO, console
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logger:
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action: INFO
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com.amazonaws: WARN
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appender:
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console:
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type: console
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layout:
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type: consolePattern
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conversionPattern: "[%d{ISO8601}][%-5p][%-25c] %m%n"
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'';
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type = types.str;
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};
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dataDir = mkOption {
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type = types.path;
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default = "/var/lib/elasticsearch";
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description = ''
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Data directory for elasticsearch.
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'';
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};
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extraCmdLineOptions = mkOption {
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description = "Extra command line options for the elasticsearch launcher.";
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default = [];
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type = types.listOf types.string;
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example = [ "-Djava.net.preferIPv4Stack=true" ];
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};
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plugins = mkOption {
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description = "Extra elasticsearch plugins";
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default = [];
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type = types.listOf types.package;
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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systemd.services.elasticsearch = {
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description = "Elasticsearch Daemon";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-interfaces.target" ];
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environment = { ES_HOME = cfg.dataDir; };
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serviceConfig = {
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ExecStart = "${pkgs.elasticsearch}/bin/elasticsearch -Des.path.conf=${configDir} ${toString cfg.extraCmdLineOptions}";
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User = "elasticsearch";
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PermissionsStartOnly = true;
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};
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preStart = ''
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mkdir -m 0700 -p ${cfg.dataDir}
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if [ "$(id -u)" = 0 ]; then chown -R elasticsearch ${cfg.dataDir}; fi
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# Install plugins
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rm ${cfg.dataDir}/plugins || true
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ln -s ${esPlugins}/plugins ${cfg.dataDir}/plugins
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'';
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postStart = mkBefore ''
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until ${pkgs.curl}/bin/curl -s -o /dev/null ${cfg.host}:${toString cfg.port}; do
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sleep 1
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done
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'';
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};
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environment.systemPackages = [ pkgs.elasticsearch ];
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users.extraUsers = singleton {
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name = "elasticsearch";
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uid = config.ids.uids.elasticsearch;
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description = "Elasticsearch daemon user";
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home = cfg.dataDir;
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};
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};
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}
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