2 files changed, 173 insertions(+), 1 deletions(-)

M configuration.nix
A prometheus.nix

@@ 6,8 6,11 @@
 
 {
 	imports =
-		[ # Include the results of the hardware scan.
+		[
+			# Include the results of the hardware scan.
 			./hardware-configuration.nix
+			# Prometheus/grafana snippet.
+			./prometheus.nix
 		];
 
 	boot = {


@@ 50,9 53,17 @@
 			enp0s20f3.useDHCP = true;
 
 			bond0.useDHCP = true;
+			# br0.useDHCP = false;
+			# br0.ipv4.addresses = [
+			# 	{
+			# 		address = "10.11.11.2";
+			# 		prefixLength = 24;
+			# 	}
+			# ];
 		};
 
 		bonds.bond0.interfaces = ["enp0s20f0" "enp0s20f1" "enp0s20f2" "enp0s20f3"];
+		# bridges.br0.interfaces = ["bond0"];
 
 		# Open ports in the firewall.
 		firewall = {

@@ 0,0 1,161 @@
+# https://xeiaso.net/blog/prometheus-grafana-loki-nixos-2020-11-20
+
+{ config, pkgs, ... }:
+
+{
+	services.grafana = {
+		enable = true;
+
+		settings = {
+			analytics.reporting_enabled = false;
+			server = {
+				domain = "grafana.local";
+				http_addr = "127.0.0.1";
+			};
+		};
+	};
+
+	services.prometheus = {
+		enable = true;
+
+		exporters = {
+			node = {
+				enable = true;
+				enabledCollectors = ["systemd"];
+			};
+
+			zfs.enable = true;
+		};
+
+		scrapeConfigs = [
+			{
+				job_name = "nodes";
+				static_configs = [{
+					targets = [
+						"127.0.0.1:${toString config.services.prometheus.exporters.node.port}"
+						"127.0.0.1:${toString config.services.prometheus.exporters.zfs.port}"
+					];
+				}];
+			}
+		];
+	};
+
+	services.loki = {
+		enable = true;
+		configuration = {
+			server.http_listen_port = 3030;
+			auth_enabled = false;
+
+			ingester = {
+				lifecycler = {
+					address = "127.0.0.1";
+					ring = {
+						kvstore = {
+							store = "inmemory";
+						};
+						replication_factor = 1;
+					};
+				};
+				chunk_idle_period = "1h";
+				max_chunk_age = "1h";
+				chunk_target_size = 999999;
+				chunk_retain_period = "30s";
+				max_transfer_retries = 0;
+			};
+
+			schema_config = {
+				configs = [{
+					from = "2022-06-06";
+					store = "boltdb-shipper";
+					object_store = "filesystem";
+					schema = "v11";
+					index = {
+						prefix = "index_";
+						period = "24h";
+					};
+				}];
+			};
+
+			storage_config = {
+				boltdb_shipper = {
+					active_index_directory = "/var/lib/loki/boltdb-shipper-active";
+					cache_location = "/var/lib/loki/boltdb-shipper-cache";
+					cache_ttl = "24h";
+					shared_store = "filesystem";
+				};
+
+				filesystem = {
+					directory = "/var/lib/loki/chunks";
+				};
+			};
+
+			limits_config = {
+				reject_old_samples = true;
+				reject_old_samples_max_age = "168h";
+			};
+
+			chunk_store_config = {
+				max_look_back_period = "0s";
+			};
+
+			table_manager = {
+				retention_deletes_enabled = false;
+				retention_period = "0s";
+			};
+
+			compactor = {
+				working_directory = "/var/lib/loki";
+				shared_store = "filesystem";
+				compactor_ring = {
+					kvstore = {
+						store = "inmemory";
+					};
+				};
+			};
+		};
+	};
+
+	services.promtail = {
+		enable = true;
+		configuration = {
+			server = {
+				http_listen_port = 3031;
+				grpc_listen_port = 0;
+			};
+			positions = {
+				filename = "/tmp/positions.yaml";
+			};
+			clients = [{
+				url = "http://127.0.0.1:${toString config.services.loki.configuration.server.http_listen_port}/loki/api/v1/push";
+			}];
+			scrape_configs = [{
+				job_name = "journal";
+				journal = {
+					max_age = "12h";
+					labels = {
+						job = "systemd-journal";
+						host = "pihole";
+					};
+				};
+				relabel_configs = [{
+					source_labels = [ "__journal__systemd_unit" ];
+					target_label = "unit";
+				}];
+			}];
+		};
+	};
+
+	services.nginx = {
+		enable = true;
+		recommendedProxySettings = true;
+		virtualHosts.${config.services.grafana.settings.server.domain} = {
+			locations."/" = {
+				proxyPass = "http://127.0.0.1:${toString config.services.grafana.settings.server.http_port}";
+				proxyWebsockets = true;
+			};
+		};
+	};
+
+	# Enable port 80 for nginx
+	networking.firewall.allowedTCPPorts = [80];
+}