Declarative Grafana / Prometheus / Loki / Tempo observability stack

Deploys the whole stack into the observability namespace of the local cluster with Kustomize alone — no helm install, no dashboard created by hand in the UI. The Makefile carries every command: deploy, dashboards, diagnostics, PVC flush, teardown. Dashboards are files, never UI objects. Each carries a stable uid, which is what keeps URLs, cross-links and alerts alive across redeployments, and references datasources by stable uid rather than by name. The dashboard ConfigMap is generated without a name-suffix hash so applying it updates it in place and Grafana reloads without a restart, while the provisioning ConfigMaps keep their hash precisely so that a change there does force one. Prometheus scrapes the kubelet /metrics/resource endpoint rather than /metrics/cadvisor: on this cluster cadvisor exposes machine_* series only and no container_* at all, which would leave every CPU and memory panel empty. Alloy ships every pod's logs to Loki through the Kubernetes API, so no /var/log mount is needed. Tempo's metrics_generator feeds span metrics and the service graph back into Prometheus, and the datasources are wired so a log line's trace_id opens the matching trace. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-25 07:27:38 +02:00
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+# Declarative datasource provisioning.
+# The `uid` values are STABLE and are what dashboard JSON files reference:
+#   "datasource": { "type": "prometheus", "uid": "prometheus" }
+apiVersion: 1
+
+deleteDatasources:
+  - name: Prometheus
+    orgId: 1
+  - name: Loki
+    orgId: 1
+  - name: Tempo
+    orgId: 1
+
+datasources:
+  - name: Prometheus
+    uid: prometheus
+    type: prometheus
+    access: proxy
+    orgId: 1
+    url: http://prometheus:9090
+    isDefault: true
+    editable: false
+    jsonData:
+      httpMethod: POST
+      timeInterval: 30s
+      manageAlerts: false
+      exemplarTraceIdDestinations:
+        - name: trace_id
+          datasourceUid: tempo
+
+  - name: Loki
+    uid: loki
+    type: loki
+    access: proxy
+    orgId: 1
+    url: http://loki:3100
+    editable: false
+    jsonData:
+      timeout: 60
+      maxLines: 1000
+      # Logs -> traces: a trace_id in the log line opens Tempo.
+      derivedFields:
+        - name: TraceID
+          matcherType: regex
+          matcherRegex: '"?trace[_-]?id"?[:=]"?([a-f0-9]{16,32})'
+          url: '$${__value.raw}'
+          datasourceUid: tempo
+          urlDisplayLabel: View trace
+
+  - name: Tempo
+    uid: tempo
+    type: tempo
+    access: proxy
+    orgId: 1
+    url: http://tempo:3200
+    editable: false
+    jsonData:
+      httpMethod: GET
+      streamingEnabled:
+        search: true
+        metrics: true
+      # Service graph fed by the metrics_generator -> Prometheus.
+      serviceMap:
+        datasourceUid: prometheus
+      nodeGraph:
+        enabled: true
+      tracesToLogsV2:
+        datasourceUid: loki
+        spanStartTimeShift: -5m
+        spanEndTimeShift: 5m
+        filterByTraceID: true
+        filterBySpanID: false
+        tags:
+          - key: service.name
+            value: app
+      tracesToMetrics:
+        datasourceUid: prometheus
+        spanStartTimeShift: -5m
+        spanEndTimeShift: 5m
+        tags:
+          - key: service.name
+            value: service