azure labels to skip in nodegroupset

cluster-autoscaler/processors/nodegroupset/azure_nodegroups.go

@@ -30,6 +30,16 @@ const AzureNodepoolLabel = "kubernetes.azure.com/agentpool"
 // AzureDiskTopologyKey is the topology key of Azure Disk CSI driver
 const AzureDiskTopologyKey = "topology.disk.csi.azure.com/zone"
 
+// Those labels are added on the VMSS and shouldn't affect nodepool similarity
+const aksEngineVersionLabel = "aksEngineVersion"
+const creationSource = "creationSource"
+const poolName = "poolName"
+const resourceNameSuffix = "resourceNameSuffix"
+const aksConsolidatedAdditionalProperties = "kubernetes.azure.com/consolidated-additional-properties"
+
+// AKS node image version
+const aksNodeImageVersion = "kubernetes.azure.com/node-image-version"
+
 func nodesFromSameAzureNodePool(n1, n2 *schedulerframework.NodeInfo) bool {
 	n1AzureNodePool := n1.Node().Labels[AzureNodepoolLabel]
 	n2AzureNodePool := n2.Node().Labels[AzureNodepoolLabel]
@@ -53,6 +63,13 @@ func CreateAzureNodeInfoComparator(extraIgnoredLabels []string, ratioOpts config
 	azureIgnoredLabels[AzureNodepoolLegacyLabel] = true
 	azureIgnoredLabels[AzureNodepoolLabel] = true
 	azureIgnoredLabels[AzureDiskTopologyKey] = true
+	azureIgnoredLabels[aksEngineVersionLabel] = true
+	azureIgnoredLabels[creationSource] = true
+	azureIgnoredLabels[poolName] = true
+	azureIgnoredLabels[resourceNameSuffix] = true
+	azureIgnoredLabels[aksNodeImageVersion] = true
+	azureIgnoredLabels[aksConsolidatedAdditionalProperties] = true
+
 	for _, k := range extraIgnoredLabels {
 		azureIgnoredLabels[k] = true
 	}

cluster-autoscaler/processors/nodegroupset/azure_nodegroups_test.go

@@ -67,10 +67,27 @@ func TestIsAzureNodeInfoSimilar(t *testing.T) {
 	n1.ObjectMeta.Labels["agentpool"] = "foo"
 	n2.ObjectMeta.Labels["agentpool"] = "bar"
 	checkNodesSimilar(t, n1, n2, comparator, true)
+	// Different creationSource
+	n1.ObjectMeta.Labels["creationSource"] = "aks-aks-nodepool2-vmss"
+	n2.ObjectMeta.Labels["creationSource"] = "aks-aks-nodepool3-vmss"
+	checkNodesSimilar(t, n1, n2, comparator, true)
+	// Different node image version
+	n1.ObjectMeta.Labels["kubernetes.azure.com/node-image-version"] = "AKSUbuntu-1804gen2-2021.01.28"
+	n2.ObjectMeta.Labels["kubernetes.azure.com/node-image-version"] = "AKSUbuntu-1804gen2-2022.01.30"
+	checkNodesSimilar(t, n1, n2, comparator, true)
 	// Custom label
 	n1.ObjectMeta.Labels["example.com/ready"] = "true"
 	n2.ObjectMeta.Labels["example.com/ready"] = "false"
 	checkNodesSimilar(t, n1, n2, comparator, true)
+	// One node with aksConsolidatedAdditionalProperties label
+	n1.ObjectMeta.Labels[aksConsolidatedAdditionalProperties] = "foo"
+	checkNodesSimilar(t, n1, n2, comparator, true)
+	// Same aksConsolidatedAdditionalProperties
+	n2.ObjectMeta.Labels[aksConsolidatedAdditionalProperties] = "foo"
+	checkNodesSimilar(t, n1, n2, comparator, true)
+	// Different aksConsolidatedAdditionalProperties label
+	n2.ObjectMeta.Labels[aksConsolidatedAdditionalProperties] = "bar"
+	checkNodesSimilar(t, n1, n2, comparator, true)
 }
 
 func TestFindSimilarNodeGroupsAzureBasic(t *testing.T) {