{config, ...}: let
  inherit (config.services) loki;
in {
  services.loki = {
    enable = true;
    configuration = {
      auth_enabled = false;
      server.http_listen_port = 3100;
      schema_config.configs = [
        {
          from = "2024-10-12";
          object_store = "filesystem";
          store = "tsdb";
          schema = "v13";
          index = {
            prefix = "index_";
            period = "24h";
          };
        }
      ];
      storage_config."filesystem".directory = "/tmp/loki/chunks";
      common = {
        ring = {
          kvstore.store = "inmemory";
        };
        replication_factor = 1;
        path_prefix = "/tmp/loki";
      };
      # https://grafana.com/docs/loki/latest/configure/#limits_config
      limits_config = {
        ingestion_rate_strategy = "local";
        ingestion_rate_mb = 128;
        ingestion_burst_size_mb = 256;
        max_streams_per_user = 0;
        max_global_streams_per_user = 0;
      };
    };
  };
  services.prometheus.scrapeConfigs = [
    {
      job_name = "loki";
      static_configs = [
        {
          targets = ["localhost:3100"];
        }
      ];
    }
  ];
  services.alloy = {
    enable = true;
    extraFlags = [
      "--server.http.listen-addr=100.106.241.122:12345"
    ];
  };
  environment.etc."alloy/config.alloy" = {
    text = ''
      discovery.relabel "system" {
        targets = []

        rule {
          source_labels = ["__journal__systemd_unit", "__journal__systemd_user_unit"]
          regex         = "(.+)"
          target_label  = "systemd_unit"
        }

        rule {
          source_labels = ["__journal__priority_keyword"]
          regex         = "(.+)"
          target_label  = "severity"
        }
      }

      loki.source.journal "system" {
        max_age       = "1h0m0s"
        path          = "/var/log/journal/"
        relabel_rules = discovery.relabel.system.rules
        forward_to    = [loki.write.default.receiver]
        labels        = {}
      }

      loki.write "default" {
        endpoint {
          url = "http://localhost:3100/loki/api/v1/push"
        }
        max_streams = 64
      }

    '';
  };
  services.grafana.provision.datasources.settings.datasources = [
    {
      name = "Loki";
      type = "loki";
      url = "http://localhost:${toString loki.configuration.server.http_listen_port}";
    }
  ];
}