feat: add Loki + Promtail logging stack

apps/loki/servicemonitor.yaml

@@ -0,0 +1,41 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: loki
+  namespace: loki
+  labels:
+    app.kubernetes.io/name: loki
+    release: k8s-monitoring
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: loki
+  namespaceSelector:
+    matchNames:
+      - loki
+  endpoints:
+    - port: http
+      interval: 30s
+      scrapeTimeout: 10s
+      path: /metrics
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: promtail
+  namespace: loki
+  labels:
+    app.kubernetes.io/name: promtail
+    release: k8s-monitoring
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: promtail
+  namespaceSelector:
+    matchNames:
+      - loki
+  endpoints:
+    - port: http-metrics
+      interval: 30s
+      scrapeTimeout: 10s
+      path: /metrics