feat: add Loki + Promtail logging stack

apps/loki/configmap.yaml

@@ -0,0 +1,82 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: loki-config
+  namespace: loki
+  labels:
+    app.kubernetes.io/name: loki
+data:
+  loki.yaml: |
+    auth_enabled: false
+
+    server:
+      http_listen_port: 3100
+      grpc_listen_port: 9096
+      log_level: info
+
+    common:
+      path_prefix: /loki
+      storage:
+        filesystem:
+          chunks_directory: /loki/chunks
+          rules_directory: /loki/rules
+      replication_factor: 1
+      ring:
+        instance_addr: 127.0.0.1
+        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
+
+    ruler:
+      alertmanager_url: http://k8s-monitoring-kube-promet-alertmanager.monitoring:9093
+
+    ingester:
+      wal:
+        enabled: true
+        dir: /loki/wal
+      lifecycler:
+        ring:
+          replication_factor: 1
+      chunk_idle_period: 1h
+      max_chunk_age: 1h
+      chunk_target_size: 1048576
+      chunk_retain_period: 30s
+
+    limits_config:
+      retention_period: 168h
+      enforce_metric_name: false
+      reject_old_samples: true
+      reject_old_samples_max_age: 168h
+      max_cache_freshness_per_query: 10m
+      split_queries_by_interval: 15m
+      ingestion_rate_mb: 10
+      ingestion_burst_size_mb: 20
+      per_stream_rate_limit: 5MB
+      per_stream_rate_limit_burst: 15MB
+
+    compactor:
+      working_directory: /loki/compactor
+      compaction_interval: 10m
+      retention_enabled: true
+      retention_delete_delay: 2h
+      retention_delete_worker_count: 150
+      delete_request_store: filesystem
+
+    analytics:
+      reporting_enabled: false