[processor/k8sattributes] Fix k8s.node.uid extraction when node.name is disabled (#43865)

Author: LeonLow97

.chloggen/LeonLow97_k8s-node-uid-extraction-when-node-name-disabled.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. receiver/filelog)
+component: processor/k8sattributes
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix k8s.node.uid extraction when node.name is disabled
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [45328]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]

processor/k8sattributesprocessor/internal/kube/client.go

@@ -981,7 +981,7 @@ func removeUnnecessaryPodData(pod *api_v1.Pod, rules ExtractionRules) *api_v1.Po
 		transformedPod.SetUID(pod.GetUID())
 	}
 
-	if rules.Node {
+	if rules.Node || rules.NodeUID {
 		transformedPod.Spec.NodeName = pod.Spec.NodeName
 	}
 

processor/k8sattributesprocessor/internal/kube/client_test.go

@@ -852,6 +852,15 @@ func TestExtractionRules(t *testing.T) {
 				}(),
 			},
 		},
+		{
+			name: "nodeUID",
+			rules: ExtractionRules{
+				NodeUID: true,
+			},
+			attributes: map[string]string{
+				"k8s.node.name": "node1",
+			},
+		},
 		{
 			name: "labels",
 			rules: ExtractionRules{