in node/util/status.go [46:83]
func preparePatchBytesforNodeStatus(nodeName types.NodeName, oldNode *v1.Node, newNode *v1.Node) ([]byte, error) {
oldData, err := json.Marshal(oldNode)
if err != nil {
return nil, fmt.Errorf("failed to Marshal oldData for node %q: %v", nodeName, err)
}
// NodeStatus.Addresses is incorrectly annotated as patchStrategy=merge, which
// will cause strategicpatch.CreateTwoWayMergePatch to create an incorrect patch
// if it changed.
manuallyPatchAddresses := (len(oldNode.Status.Addresses) > 0) && !equality.Semantic.DeepEqual(oldNode.Status.Addresses, newNode.Status.Addresses)
// Reset spec to make sure only patch for Status or ObjectMeta is generated.
// Note that we don't reset ObjectMeta here, because:
// 1. This aligns with Nodes().UpdateStatus().
// 2. Some component does use this to update node annotations.
diffNode := newNode.DeepCopy()
diffNode.Spec = oldNode.Spec
if manuallyPatchAddresses {
diffNode.Status.Addresses = oldNode.Status.Addresses
}
newData, err := json.Marshal(diffNode)
if err != nil {
return nil, fmt.Errorf("failed to Marshal newData for node %q: %v", nodeName, err)
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, v1.Node{})
if err != nil {
return nil, fmt.Errorf("failed to CreateTwoWayMergePatch for node %q: %v", nodeName, err)
}
if manuallyPatchAddresses {
patchBytes, err = fixupPatchForNodeStatusAddresses(patchBytes, newNode.Status.Addresses)
if err != nil {
return nil, fmt.Errorf("failed to fix up NodeAddresses in patch for node %q: %v", nodeName, err)
}
}
return patchBytes, nil
}