rico1: add loki

hosts/rico1/services/apps/default.nix

@@ -5,6 +5,7 @@ _: {
     ./wiki.nix
     ./alertmanager.nix
     ./blocky.nix
+    ./loki
     ../../../shared/prometheus-exporters.nix
     ../../../shared/promtail.nix
   ];

hosts/rico1/services/apps/loki/default.nix

@@ -0,0 +1,23 @@
+_:
+let
+  inherit (import ../../../../shared/caddy-helpers.nix) logFormat;
+  domainName = "loki.labs.adtya.xyz";
+in
+{
+  services = {
+    caddy = {
+      virtualHosts."${domainName}" = {
+        logFormat = logFormat domainName;
+        extraConfig = ''
+          reverse_proxy 127.0.0.1:3100
+        '';
+      };
+    };
+    loki = {
+      enable = true;
+      dataDir = "/mnt/data/loki";
+      configFile = ./loki-config.yaml;
+    };
+  };
+  systemd.services.loki.unitConfig.RequiresMountsFor = [ "/mnt/data" ];
+}

hosts/rico1/services/apps/loki/loki-config.yaml

@@ -0,0 +1,58 @@
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+  grpc_listen_port: 9096
+  log_level: info
+  grpc_server_max_concurrent_streams: 1000
+
+common:
+  instance_addr: 127.0.0.1
+  path_prefix: /mnt/data/loki
+  storage:
+    filesystem:
+      chunks_directory: /mnt/data/loki/chunks
+      rules_directory: /mnt/data/loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+query_range:
+  results_cache:
+    cache:
+      embedded_cache:
+        enabled: true
+        max_size_mb: 100
+
+schema_config:
+  configs:
+    - from: 2020-10-24
+      store: tsdb
+      object_store: filesystem
+      schema: v13
+      index:
+        prefix: index_
+        period: 24h
+
+pattern_ingester:
+  enabled: true
+
+ruler:
+  alertmanager_url: https://alertmanager.labs.adtya.xyz
+
+frontend:
+  encoding: protobuf
+
+# By default, Loki will send anonymous, but uniquely-identifiable usage and configuration
+# analytics to Grafana Labs. These statistics are sent to https://stats.grafana.org/
+#
+# Statistics help us better understand how Loki is used, and they show us performance
+# levels for most users. This helps us prioritize features and documentation.
+# For more information on what's sent, look at
+# https://github.com/grafana/loki/blob/main/pkg/analytics/stats.go
+# Refer to the buildReport method to see what goes into a report.
+#
+# If you would like to disable reporting, uncomment the following lines:
+analytics:
+  reporting_enabled: false