{ config, lib, libNginx, ... }: with lib; let cfg = config.nixfiles.modules.loki; in { options.nixfiles.modules.loki = { enable = mkEnableOption "Loki"; port = mkOption { description = "Port."; type = with types; port; default = 30171; }; domain = mkOption { description = "Domain name sans protocol scheme."; type = with types; str; default = "loki.${config.networking.domain}"; }; }; config = mkIf cfg.enable { ark.directories = [ config.services.loki.configuration.common.path_prefix ]; nixfiles.modules.nginx = with cfg; { enable = true; upstreams.loki.servers."127.0.0.1:${toString cfg.port}" = { }; virtualHosts.${domain} = { locations."/".proxyPass = "http://loki"; extraConfig = libNginx.config.internalOnly; }; }; services.loki = { enable = true; configuration = rec { auth_enabled = false; server = { http_listen_address = "127.0.0.1"; http_listen_port = cfg.port; grpc_listen_address = "127.0.0.1"; grpc_listen_port = server.http_listen_port + 1; log_level = "warn"; }; common = { path_prefix = config.services.loki.dataDir; storage.filesystem = { chunks_directory = "${common.path_prefix}/chunks"; rules_directory = "${common.path_prefix}/rules"; }; replication_factor = 1; ring = { instance_addr = "127.0.0.1"; kvstore.store = "inmemory"; }; }; ingester = { chunk_idle_period = "15m"; max_chunk_age = "15m"; }; compactor = { working_directory = "${common.path_prefix}/compactor"; retention_enabled = true; retention_delete_delay = "1h"; retention_delete_worker_count = 64; }; ruler = { enable_api = true; storage = { type = "local"; local.directory = common.storage.filesystem.rules_directory; }; }; limits_config = { max_streams_per_user = 0; max_global_streams_per_user = 0; max_query_series = 4096; retention_period = "720h"; deletion_mode = "filter-and-delete"; }; schema_config.configs = [ { from = "2024-01-01"; store = "tsdb"; object_store = "filesystem"; schema = "v12"; index = { prefix = "index_"; period = "24h"; }; chunks = { prefix = "chunks_"; period = "24h"; }; } ]; analytics.reporting_enabled = false; }; }; systemd.tmpfiles.rules = with config.services.loki.configuration.common; [ "d ${path_prefix} 0700 loki loki - -" "d ${storage.filesystem.chunks_directory} 0700 loki loki - -" "d ${storage.filesystem.rules_directory} 0700 loki loki - -" ]; }; }