REFACTOR(otel): migrate collector from Operator to Helm

- Remove opentelemetry-operator (no longer needed)
- Convert opentelemetry-collector to direct Helm Chart
- Remove CRD-based manifests (collector.yaml, rbac.yaml)
- Update helm-values.yaml with Loki labels and env vars
- Simplify architecture: Helm -> DaemonSet (no Operator)

opentelemetry-collector/helm-values.yaml

@@ -32,6 +32,23 @@ resources:
   limits:
     memory: 512Mi
 
+# =============================================================================
+# Environment Variables
+# =============================================================================
+extraEnvs:
+  - name: K8S_NODE_NAME
+    valueFrom:
+      fieldRef:
+        fieldPath: spec.nodeName
+  - name: K8S_POD_NAME
+    valueFrom:
+      fieldRef:
+        fieldPath: metadata.name
+  - name: K8S_POD_IP
+    valueFrom:
+      fieldRef:
+        fieldPath: status.podIP
+
 # =============================================================================
 # Extra Volumes for Log Collection
 # =============================================================================
@@ -152,6 +169,13 @@ config:
         - type: move
           from: attributes.log
           to: body
+        # Loki label hints - tell Loki exporter which attributes to use as labels
+        - type: add
+          field: resource["loki.resource.labels"]
+          value: "k8s.namespace.name, k8s.pod.name, k8s.container.name, k8s.node.name"
+        - type: add
+          field: attributes["loki.attribute.labels"]
+          value: "log.iostream"
 
     # Prometheus receiver - self metrics only
     # Infrastructure metrics (node-exporter, kube-state-metrics) handled by Prometheus
@@ -160,9 +184,9 @@ config:
         scrape_configs:
           # OTel Collector self metrics only
           - job_name: 'otel-collector'
-            scrape_interval: 30s
+            scrape_interval: 60s
             static_configs:
-              - targets: ['${env:MY_POD_IP}:8888']
+              - targets: ['${env:K8S_POD_IP}:8888']
 
   # ---------------------------------------------------------------------------
   # Processors - how data is transformed
@@ -220,12 +244,14 @@ config:
       endpoint: http://prometheus-kube-prometheus-prometheus.prometheus.svc:9090/api/v1/write
       tls:
         insecure: true
+      external_labels:
+        otel_collector: ${env:K8S_POD_NAME}
 
     # Loki for logs
     loki:
       endpoint: http://loki.loki.svc.cluster.local:3100/loki/api/v1/push
       default_labels_enabled:
-        exporter: true
+        exporter: false
         level: true
 
     # Debug exporter (for troubleshooting)