Go to the CCE console, access the cluster console, and choose Nodes in the navigation pane. On the displayed page, click the Nodes tab, select all nodes, and click Manage Labels and Taints to view the labels and taints of the current node.
User labels are not changed during the cluster upgrade. If you find that labels are lost or added abnormally, contact technical support.
If you find a new taint (node.kubernetes.io/upgrade) on a node, the node may be skipped during the upgrade. For details, see Node Skipping Check for Reset.
If you find that other taints are added to the node, contact technical support.