API Gateway-Bringing Together API and Microservice Management
For over two decades, software architects considered applications as collections of disseminated services. Componentization and binding comprise all the techniques and architecture rising from this viewpoint. And in the era of the cloud, software componentization assists reuse of code, encourages improved scalability and flexibility for applications. Services are revealed through a directory and accessed through a structured API in SOA. Rather complex tasks were performed by SOA services, and hence, the operational cost connected with the API management course wasn't seen to be an obstacle.
A microservice is a module that is capable of carrying out a single business function, and microservices are developed by dividing business functions into technical steps by development teams. Microservices are typically accessed through a simple RESTful API, and is time consuming. Hence, microservice application needs to refrain from granularity that may impact performance in addition to managing security and compliance.
API gateway is a strategy that has surfaced as a framework that protects the benefits of both API managements, as well as microservices managements. A single API is presented to a device to masquerade a complex series of microservice access processes, by an API gateway. This reduces the burden of the device from the task of assembling microservices, decrease the microservices traffic from the device link, which is most vulnerable to get clogged, and trim down access security and compliance threats by placing the microservices behind a firewall.
As there is nothing without risk, so is the case with gateway strategy. One risk is that, loss or failure of a gateway component can kill access to the microservice that it represents. Secondly, damage to a gateway can be a threat of damage to all the microservices. And the final threat is of issues with regard to performance where the gateway can be expected to lower the application’s QoE (Quality of Experience).