feat(helm): expose OTEL headers, service name, and resource attributes

helm/kagent/templates/controller-configmap.yaml

@@ -51,6 +51,30 @@ data:
   OTEL_EXPORTER_OTLP_LOGS_TIMEOUT: {{ .Values.otel.logging.exporter.otlp.timeout | quote }}
   {{- end }}
   {{- end }}
+  {{- if .Values.otel.tracing.exporter.otlp.headers }}
+  {{- $traceHeaders := list }}
+  {{- range $k := keys .Values.otel.tracing.exporter.otlp.headers | sortAlpha }}
+  {{- $traceHeaders = append $traceHeaders (printf "%s=%s" $k (index $.Values.otel.tracing.exporter.otlp.headers $k | toString)) }}
+  {{- end }}
+  OTEL_EXPORTER_OTLP_TRACES_HEADERS: {{ join "," $traceHeaders | quote }}
+  {{- end }}
+  {{- if .Values.otel.logging.exporter.otlp.headers }}
+  {{- $logHeaders := list }}
+  {{- range $k := keys .Values.otel.logging.exporter.otlp.headers | sortAlpha }}
+  {{- $logHeaders = append $logHeaders (printf "%s=%s" $k (index $.Values.otel.logging.exporter.otlp.headers $k | toString)) }}
+  {{- end }}
+  OTEL_EXPORTER_OTLP_LOGS_HEADERS: {{ join "," $logHeaders | quote }}
+  {{- end }}
+  {{- if .Values.otel.serviceName }}
+  OTEL_SERVICE_NAME: {{ .Values.otel.serviceName | quote }}
+  {{- end }}
+  {{- if .Values.otel.resourceAttributes }}
+  {{- $resourceAttrs := list }}
+  {{- range $k := keys .Values.otel.resourceAttributes | sortAlpha }}
+  {{- $resourceAttrs = append $resourceAttrs (printf "%s=%s" $k (index $.Values.otel.resourceAttributes $k | toString)) }}
+  {{- end }}
+  OTEL_RESOURCE_ATTRIBUTES: {{ join "," $resourceAttrs | quote }}
+  {{- end }}
   {{- if .Values.proxy.url }}
   PROXY_URL: {{ .Values.proxy.url | quote }}
   {{- end }}

helm/kagent/tests/controller-deployment_test.yaml

@@ -166,6 +166,63 @@ tests:
           path: data.A2A_BASE_URL
           value: "https://kagent.example.com"
 
+  - it: should not set optional OTEL env vars by default
+    template: controller-configmap.yaml
+    asserts:
+      - notExists:
+          path: data.OTEL_SERVICE_NAME
+      - notExists:
+          path: data.OTEL_RESOURCE_ATTRIBUTES
+      - notExists:
+          path: data.OTEL_EXPORTER_OTLP_TRACES_HEADERS
+      - notExists:
+          path: data.OTEL_EXPORTER_OTLP_LOGS_HEADERS
+
+  - it: should set OTEL_SERVICE_NAME when configured
+    template: controller-configmap.yaml
+    set:
+      otel:
+        serviceName: "kagent-controller-prod"
+    asserts:
+      - equal:
+          path: data.OTEL_SERVICE_NAME
+          value: "kagent-controller-prod"
+
+  - it: should render OTEL_RESOURCE_ATTRIBUTES as sorted key=value pairs
+    template: controller-configmap.yaml
+    set:
+      otel:
+        resourceAttributes:
+          service.namespace: kagent
+          deployment.environment: production
+    asserts:
+      - equal:
+          path: data.OTEL_RESOURCE_ATTRIBUTES
+          value: "deployment.environment=production,service.namespace=kagent"
+
+  - it: should render OTLP traces and logs headers as sorted key=value pairs
+    template: controller-configmap.yaml
+    set:
+      otel:
+        tracing:
+          exporter:
+            otlp:
+              headers:
+                x-honeycomb-team: trace-key
+                x-honeycomb-dataset: kagent
+        logging:
+          exporter:
+            otlp:
+              headers:
+                authorization: "Basic bG9ncw=="
+    asserts:
+      - equal:
+          path: data.OTEL_EXPORTER_OTLP_TRACES_HEADERS
+          value: "x-honeycomb-dataset=kagent,x-honeycomb-team=trace-key"
+      - equal:
+          path: data.OTEL_EXPORTER_OTLP_LOGS_HEADERS
+          value: "authorization=Basic bG9ncw=="
+
   - it: should set PROXY_URL when set
     template: controller-configmap.yaml
     set:

helm/kagent/values.yaml

@@ -917,6 +917,13 @@ oauth2-proxy:
 # ==============================================================================
 
 otel:
+  # -- Logical service name reported to the OTLP backend, rendered as OTEL_SERVICE_NAME.
+  # @default -- "" (SDK default)
+  serviceName: ""
+  # -- Additional OpenTelemetry resource attributes, rendered as a comma-joined
+  # key=value list in OTEL_RESOURCE_ATTRIBUTES.
+  # Example: { deployment.environment: production, service.namespace: kagent }
+  resourceAttributes: {}
   tracing:
     enabled: false
     exporter:
@@ -925,6 +932,11 @@ otel:
         protocol: "grpc"
         timeout: 15000 # milliseconds
         insecure: true
+        # -- Headers sent with OTLP trace export requests, rendered as a comma-joined
+        # key=value list in OTEL_EXPORTER_OTLP_TRACES_HEADERS.
+        # Values land in a ConfigMap in plain text: for secrets (API keys, tokens),
+        # inject the env var from a Secret via controller.env / envFrom instead.
+        headers: {}
   logging:
     enabled: false
     exporter: