replica counts

Description

scaleitThe purpose of this exercise is to write an auto-scaler that manipulates thenumber of replicas of a separate application based on CPU utilization metrics.As your auto-scaler changes the replica count, CPU utilization will be impactedaccordingly.company has provided such an application that has the following characteristics:* it starts on a user defined port (given by the --port flag) defaulting to 8123* the JSON/REST API allows you to monitor the application’s emulated CPUusage and change the number of replicas * its APIs occasionally return errorsto mimic real lifeThe reported CPU usage will simulate a real application and rise and fall overtime. At the same time, increasing the number of replicas will make the CPUusage go down and vice versa.Your ChallengeWrite an application that uses the API described below to automatically adjustthe number of replicas to keep the average CPU usage reported to average 0.80(80%).Please write your application in one of the following languages: Python, Go,Ruby, Java, TypeScript/JavaScript, or C/C++What We’re Looking For
Your submission will be evaluated based on the following criteria: * clean, read-able, testable, performant and well-documented code * demonstrated knowledge
of software engineering best practices in the programming language of yourchoice * correctness and bug-free codeYou should be thorough, but feel free to simply document where you would dothings differently in a real production environment rather than an exercise.We expect that this exercise will take roughly 60 to 90 minutes.The APIThe following describes the REST API implemented by the sample application.Current StatusThe /app/status API expects an HTTP GET request with an Accept headerwith a value of application/json. It, as you might expect, returns a JSONrepresentation of the current app status that looks like this:{"cpu": {
1
"highPriority": 0.68},"replicas": 10}CPU utilization is returned as a float between 0 and 1. Replicas is an integergreater than or equal to 1.Updating the Replica CountThe /app/replicas API expects an HTTP PUT request with a Content-Typeheader with a value of application/json. The body of the request shouldcontain JSON in the following format.{"replicas": 11}The replicas key should have an integer value greater than one. Invalid valueswill return HTTP 400 Bad Request.