fix the panic when kubelet registers if a node object already exists …

…with no Status.Capacity or Status.Allocatable

Signed-off-by: SataQiu <1527062125@qq.com>
(cherry picked from commit c73ea0a)

pkg/kubelet/kubelet_node_status.go

@@ -127,7 +127,7 @@ func (kl *Kubelet) tryRegisterWithAPIServer(node *v1.Node) bool {
 
 // reconcileHugePageResource will update huge page capacity for each page size and remove huge page sizes no longer supported
 func (kl *Kubelet) reconcileHugePageResource(initialNode, existingNode *v1.Node) bool {
-	requiresUpdate := false
+	requiresUpdate := updateDefaultResources(initialNode, existingNode)
 	supportedHugePageResources := sets.String{}
 
 	for resourceName := range initialNode.Status.Capacity {
@@ -174,7 +174,7 @@ func (kl *Kubelet) reconcileHugePageResource(initialNode, existingNode *v1.Node)
 
 // Zeros out extended resource capacity during reconciliation.
 func (kl *Kubelet) reconcileExtendedResource(initialNode, node *v1.Node) bool {
-	requiresUpdate := false
+	requiresUpdate := updateDefaultResources(initialNode, node)
 	// Check with the device manager to see if node has been recreated, in which case extended resources should be zeroed until they are available
 	if kl.containerManager.ShouldResetExtendedResourceCapacity() {
 		for k := range node.Status.Capacity {
@@ -189,6 +189,29 @@ func (kl *Kubelet) reconcileExtendedResource(initialNode, node *v1.Node) bool {
 	return requiresUpdate
 }
 
+// updateDefaultResources will set the default resources on the existing node according to the initial node
+func updateDefaultResources(initialNode, existingNode *v1.Node) bool {
+	requiresUpdate := false
+	if existingNode.Status.Capacity == nil {
+		if initialNode.Status.Capacity != nil {
+			existingNode.Status.Capacity = initialNode.Status.Capacity.DeepCopy()
+			requiresUpdate = true
+		} else {
+			existingNode.Status.Capacity = make(map[v1.ResourceName]resource.Quantity)
+		}
+	}
+
+	if existingNode.Status.Allocatable == nil {
+		if initialNode.Status.Allocatable != nil {
+			existingNode.Status.Allocatable = initialNode.Status.Allocatable.DeepCopy()
+			requiresUpdate = true
+		} else {
+			existingNode.Status.Allocatable = make(map[v1.ResourceName]resource.Quantity)
+		}
+	}
+	return requiresUpdate
+}
+
 // updateDefaultLabels will set the default labels on the node
 func (kl *Kubelet) updateDefaultLabels(initialNode, existingNode *v1.Node) bool {
 	defaultLabels := []string{