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Fix panic when kubelet register if a node object already exists with no Status.Capacity or Status.Allocatable #95269

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merged 1 commit into from Dec 9, 2020
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Fix panic when kubelet register if a node object already exists with no Status.Capacity or Status.Allocatable #95269

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27 changes: 25 additions & 2 deletions pkg/kubelet/kubelet_node_status.go
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Expand Up @@ -126,7 +126,7 @@ 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 {
Expand Down Expand Up @@ -173,7 +173,7 @@ 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 {
Expand All @@ -188,6 +188,29 @@ 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{
Expand Down