add loki (#72)

Author: Marketen

docker-compose.yml

@@ -67,6 +67,14 @@ services:
     image: "stakers-metrics.dms.dnp.dappnode.eth:1.0.3"
     environment:
       - DEBUG_MODE=false
+  loki:
+    build:
+      context: loki
+      args:
+        UPSTREAM_VERSION: 2.7.3
+    command: "-config.file=/etc/loki/local-config.yaml"
+    restart: always
+    image: "loki.dms.dnp.dappnode.eth:1.0.1"
 volumes:
   grafana_data: {}
   prometheus_data: {}

grafana/datasource.yml

@@ -9,3 +9,11 @@ datasources:
     basicAuth: false
     isDefault: true
     editable: true
+  - name: loki
+    type: loki
+    access: proxy
+    orgId: 1
+    url: http://loki:3100
+    basicAuth: false
+    isDefault: false
+    editable: true

loki/Dockerfile

@@ -0,0 +1,6 @@
+
+ARG UPSTREAM_VERSION
+
+FROM grafana/loki:${UPSTREAM_VERSION}
+
+COPY local-config.yaml /etc/loki/local-config.yaml

loki/local-config.yaml

@@ -0,0 +1,54 @@
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+  grpc_listen_port: 9096
+
+common:
+  instance_addr: 127.0.0.1
+  path_prefix: /tmp/loki
+  storage:
+    filesystem:
+      chunks_directory: /tmp/loki/chunks
+      rules_directory: /tmp/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: boltdb-shipper
+      object_store: filesystem
+      schema: v11
+      index:
+        prefix: index_
+        period: 24h
+
+limits_config:
+  ingestion_rate_mb: 1024
+  ingestion_burst_size_mb: 1024
+
+ruler:
+  alertmanager_url: http://localhost:9093
+
+# 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/usagestats/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