feat: expose pod info using downward api

stable/app/Chart.yaml

@@ -15,4 +15,4 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.5.5
+version: 0.5.6

stable/app/templates/deployment.yaml

@@ -100,6 +100,26 @@ spec:
           - containerPort: 55679
             name: zpages
             protocol: TCP
+          env:
+            - name: K8S_NODE_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: spec.nodeName
+            - name: K8S_POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+            - name: K8S_POD_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: K8S_POD_IP
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+            - name: OTEL_RESOURCE_ATTRIBUTES
+              value: |
+                k8s.deployment.name={{ include "app.fullname" . }},k8s.namespace.name=$(K8S_POD_NAMESPACE),k8s.node.name=$(K8S_NODE_NAME),k8s.pod.name=$(K8S_POD_NAME),k8s.pod.ip=$(K8S_POD_IP)
           volumeMounts:
             - name: otelcollector-conf
               mountPath: /etc/otelcollector/