[processor/k8sattributes] Fix node/ns labels/annotations extraction (o…

…pen-telemetry#28838) Set attributes from namespace/node labels or annotations even if `k8s.namespace.name` and `k8s.node.name` are not extracted. Fixes open-telemetry#28837
jmsnll · Nov 12, 2023 · 5d3249a · 5d3249a
1 parent c401891
commit 5d3249a
Show file tree

Hide file tree

Showing 3 changed files with 175 additions and 4 deletions.
diff --git a/.chloggen/k8s-attrs-fix-ns-node-labels-annotation-setting.yaml b/.chloggen/k8s-attrs-fix-ns-node-labels-annotation-setting.yaml
@@ -0,0 +1,11 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: processor/k8sattributes
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Set attributes from namespace/node labels or annotations even if node/namespaces attribute are not set.
+
+# One or more tracking issues related to the change
+issues: [28837]
diff --git a/processor/k8sattributesprocessor/processor.go b/processor/k8sattributesprocessor/processor.go
@@ -113,8 +113,10 @@ func (kp *kubernetesprocessor) processResource(ctx context.Context, resource pco
 		return
 	}
 
+	var pod *kube.Pod
 	if podIdentifierValue.IsNotEmpty() {
-		if pod, ok := kp.kc.GetPod(podIdentifierValue); ok {
+		var podFound bool
+		if pod, podFound = kp.kc.GetPod(podIdentifierValue); podFound {
 			kp.logger.Debug("getting the pod", zap.Any("pod", pod))
 
 			for key, val := range pod.Attributes {
@@ -126,7 +128,7 @@ func (kp *kubernetesprocessor) processResource(ctx context.Context, resource pco
 		}
 	}
 
-	namespace := stringAttributeFromMap(resource.Attributes(), conventions.AttributeK8SNamespaceName)
+	namespace := getNamespace(pod, resource.Attributes())
 	if namespace != "" {
 		attrsToAdd := kp.getAttributesForPodsNamespace(namespace)
 		for key, val := range attrsToAdd {
@@ -136,7 +138,7 @@ func (kp *kubernetesprocessor) processResource(ctx context.Context, resource pco
 		}
 	}
 
-	nodeName := stringAttributeFromMap(resource.Attributes(), conventions.AttributeK8SNodeName)
+	nodeName := getNodeName(pod, resource.Attributes())
 	if nodeName != "" {
 		attrsToAdd := kp.getAttributesForPodsNode(nodeName)
 		for key, val := range attrsToAdd {
@@ -147,6 +149,20 @@ func (kp *kubernetesprocessor) processResource(ctx context.Context, resource pco
 	}
 }
 
+func getNamespace(pod *kube.Pod, resAttrs pcommon.Map) string {
+	if pod != nil && pod.Namespace != "" {
+		return pod.Namespace
+	}
+	return stringAttributeFromMap(resAttrs, conventions.AttributeK8SNamespaceName)
+}
+
+func getNodeName(pod *kube.Pod, resAttrs pcommon.Map) string {
+	if pod != nil && pod.NodeName != "" {
+		return pod.NodeName
+	}
+	return stringAttributeFromMap(resAttrs, conventions.AttributeK8SNodeName)
+}
+
 // addContainerAttributes looks if pod has any container identifiers and adds additional container attributes
 func (kp *kubernetesprocessor) addContainerAttributes(attrs pcommon.Map, pod *kube.Pod) {
 	containerName := stringAttributeFromMap(attrs, conventions.AttributeK8SContainerName)

diff --git a/processor/k8sattributesprocessor/processor_test.go b/processor/k8sattributesprocessor/processor_test.go
@@ -659,7 +659,7 @@ func TestPodUID(t *testing.T) {
 	})
 }
 
-func TestProcessorAddLabels(t *testing.T) {
+func TestAddPodLabels(t *testing.T) {
 	m := newMultiTest(
 		t,
 		NewFactory().CreateDefaultConfig(),
@@ -727,6 +727,150 @@ func TestProcessorAddLabels(t *testing.T) {
 	}
 }
 
+func TestAddNamespaceLabels(t *testing.T) {
+	m := newMultiTest(
+		t,
+		func() component.Config {
+			cfg := createDefaultConfig().(*Config)
+			cfg.Extract.Metadata = []string{}
+			cfg.Extract.Labels = []FieldExtractConfig{
+				{
+					From: kube.MetadataFromNamespace,
+					Key:  "namespace-label",
+				},
+			}
+			return cfg
+		}(),
+		nil,
+	)
+
+	podIP := "1.1.1.1"
+	namespaces := map[string]map[string]string{
+		"namespace-1": {
+			"nslabel": "1",
+		},
+		"namespace-2": {
+			"nslabel": "2",
+		},
+	}
+	m.kubernetesProcessorOperation(func(kp *kubernetesprocessor) {
+		kp.podAssociations = []kube.Association{
+			{
+				Sources: []kube.AssociationSource{
+					{
+						From: "connection",
+					},
+				},
+			},
+		}
+	})
+
+	m.kubernetesProcessorOperation(func(kp *kubernetesprocessor) {
+		pi := kube.PodIdentifier{
+			kube.PodIdentifierAttributeFromConnection(podIP),
+		}
+		kp.kc.(*fakeClient).Pods[pi] = &kube.Pod{Name: "test-2323", Namespace: "namespace-1"}
+		kp.kc.(*fakeClient).Namespaces = make(map[string]*kube.Namespace)
+		for ns, labels := range namespaces {
+			kp.kc.(*fakeClient).Namespaces[ns] = &kube.Namespace{Attributes: labels}
+		}
+	})
+
+	ctx := client.NewContext(context.Background(), client.Info{
+		Addr: &net.IPAddr{
+			IP: net.ParseIP(podIP),
+		},
+	})
+	m.testConsume(
+		ctx,
+		generateTraces(),
+		generateMetrics(),
+		generateLogs(),
+		func(err error) {
+			assert.NoError(t, err)
+		})
+
+	m.assertBatchesLen(1)
+	m.assertResourceObjectLen(0)
+	m.assertResource(0, func(res pcommon.Resource) {
+		assert.Equal(t, 2, res.Attributes().Len())
+		assertResourceHasStringAttribute(t, res, "k8s.pod.ip", podIP)
+		assertResourceHasStringAttribute(t, res, "nslabel", "1")
+	})
+}
+
+func TestAddNodeLabels(t *testing.T) {
+	m := newMultiTest(
+		t,
+		func() component.Config {
+			cfg := createDefaultConfig().(*Config)
+			cfg.Extract.Metadata = []string{}
+			cfg.Extract.Labels = []FieldExtractConfig{
+				{
+					From: kube.MetadataFromNode,
+					Key:  "node-label",
+				},
+			}
+			return cfg
+		}(),
+		nil,
+	)
+
+	podIP := "1.1.1.1"
+	nodes := map[string]map[string]string{
+		"node-1": {
+			"nodelabel": "1",
+		},
+		"node-2": {
+			"nodelabel": "2",
+		},
+	}
+	m.kubernetesProcessorOperation(func(kp *kubernetesprocessor) {
+		kp.podAssociations = []kube.Association{
+			{
+				Sources: []kube.AssociationSource{
+					{
+						From: "connection",
+					},
+				},
+			},
+		}
+	})
+
+	m.kubernetesProcessorOperation(func(kp *kubernetesprocessor) {
+		pi := kube.PodIdentifier{
+			kube.PodIdentifierAttributeFromConnection(podIP),
+		}
+		kp.kc.(*fakeClient).Pods[pi] = &kube.Pod{Name: "test-2323", NodeName: "node-1"}
+		kp.kc.(*fakeClient).Nodes = make(map[string]*kube.Node)
+		for ns, labels := range nodes {
+			kp.kc.(*fakeClient).Nodes[ns] = &kube.Node{Attributes: labels}
+		}
+	})
+
+	ctx := client.NewContext(context.Background(), client.Info{
+		Addr: &net.IPAddr{
+			IP: net.ParseIP(podIP),
+		},
+	})
+	m.testConsume(
+		ctx,
+		generateTraces(),
+		generateMetrics(),
+		generateLogs(),
+		func(err error) {
+			assert.NoError(t, err)
+		})
+
+	m.assertBatchesLen(1)
+	m.assertResourceObjectLen(0)
+	m.assertResource(0, func(res pcommon.Resource) {
+		assert.Equal(t, 2, res.Attributes().Len())
+		assertResourceHasStringAttribute(t, res, "k8s.pod.ip", podIP)
+		assertResourceHasStringAttribute(t, res, "nodelabel", "1")
+	})
+}
+
 func TestProcessorAddContainerAttributes(t *testing.T) {
 	tests := []struct {
 		name         string