Instead, microservices should only talk with a single environment - and this is where API gateways come into the mix. Trying to maintain multiple API methods between one calling and multiple responding microservices is a recipe for problems, not least is a return to numerous repetitive testing processes to make minor changes. Using APIs to directly enable microservices to talk to each other is not a good idea. How microservices and APIs work togetherĬomputer science guru Andrew Tanenbaum once said, "The nice thing about standards is that you have so many to choose from." This truism has caused many issues in the world of IT, including microservices and APIs. There is general acceptance and use of some protocols and application code - such as representational state transfer, simple object access protocol, JavaScript object notation and extensible markup language - but a developer can build these "standardized" environments with pretty much anything, which complicates communication between apps and services. Unfortunately, not all APIs are standardized or follow the same format. One microservice can use an API to access the functionality of another microservice. APIs offer this capability, as long as they are carefully implemented, used and managed.Īn API offers a standardized means for a system to access applications, services (and microservices) or data outside of the code's direct environment. Let's review their individual roles and how an organization can design an architecture that utilizes their advantages.Īll of this flexibility requires microservices to talk to each other. These two concepts, microservices and APIs, differ in many ways, but they also work in concert. Many app architectures are now built with APIs that standardize and facilitate the exchange of data and services, whether these interactions involve end customers, business partners or strictly internal users. There are other pathways an organization can take to modernize their applications in a world that increasingly depends upon software-based services. The very nature of a microservice-based architecture is to manage workflows by aggregating microservices into a composite app that meets the workflow's needs. Microservices make continuous development and continuous delivery more manageable and effective across such virtual environments. In the final project, you will create microservices and use them in a frontend application.This new world of rapid app changes drives the adoption of microservices as a more flexible means to provision and manage IT services across an organization's overall IT platform. The course contains several hands-on labs which allow you to apply the content you learn in the course. Next, you will learn the basics of Serverless applications, and how to run your applications on the IBM Cloud Code Engine. You will create REST API using Python and Flask. In this course, you will create microservices using various methodologies. Giving developers and operators the ability to run applications without managing underlying infrastructure. Likewise, serverless has emerged as an increasingly popular compute option in the cloud era. This architecture is used in the largest software organizations in the world, because it provides cost benefits, team autonomy, and other advantages. Rather than building large applications, known as monoliths, that perform all the functionality, microservices break down larger applications into smaller pieces that are independently maintainable and scalable, providing a host of benefits. Welcome to this introductory course on microservices and serverless.
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