A method for receiving, in an application orchestrator, a request for executing an application. The method includes identifying a function sequence to complete the application, each function in the function sequence is executed in one instance, and identifying an instance chain of the functions to complete the application, wherein the instance chain includes an instance for each function in the function sequence. The method includes tracking a performance of each instance for each function in the chain, and selecting an application execution route based on the performance that includes the instance chain of the functions to complete the application. The method includes allocating a server resource to each instance for each function and modifying the application execution route based on a performance and a performance policy. A system and a computer readable medium storing instructions to perform the above method are also provided.