An instance node management method is disclosed, which includes: creating a primary instance node for an application hosted on a cloud platform to run an instance of the application; determining, according to running start information of the primary instance node, a minimum resource configuration specification required by a secondary instance node of the application, where the secondary instance node is configured to replace the primary instance node when the primary instance node is faulty; and creating the secondary instance node according to the minimum resource configuration specification. The instance node management method as provided can reduce occupancy of a spare resource and increase an application hosting capability and scale on the cloud platform.