Microservices Design - API Gateway Pattern

• Tyk

  6 9,229 9.6 Go

  Tyk Open Source API Gateway written in Go, supporting REST, GraphQL, TCP and gRPC protocols

  

Amazon API Gateway AWS provides fully managed service for creating, publishing, maintaining, monitoring, and securing REST, HTTP, and WebSocket where developers can create APIs that access AWS or other web services, as well as data stored in the AWS Cloud. Kong API Gateway Kong Gateway is an open-source, lightweight API gateway optimized for microservices, delivering unparalleled latency performance and scalability. If you just want the basics, this option will work for you. It is scalable easily horizontally by adding more nodes. It supports large and variable workloads with very low latency. Other API Gateways Apigee API Gateway MuleSoft Tyk.io Akana SwaggerHub Azure API Gateway Express API Gateway Karken D Choosing the right API gateway Some of the common baseline for evaluation criteria include simplicity, open-source vs propriety, scalability & flexibility, security, features, community, administrative (support, monitoring & deployment), environment provisioning(installation, configuration, hosting offering), pricing, and documentation. API Composition / Aggregation Some API requests in API Gateway map directly to single service API which can be served by routing request to the corresponding microservice. However, in the case of complex API operations that requires results from several microservices can be served by API composition/aggregation (a scatter-gather mechanism). In case of dependency of one another service where synchronous communication is required, the chained composition pattern has to be followed. The composition layer has to support a significant portion of ESB/integration capabilities such as transformations, orchestration, resiliency, and stability patterns. A root container is deployed with the special distributor and aggregator functionalities (or microservices). The distributor is responsible for breaking down into granular tasks and distributing those tasks to microservice instances. The aggregator is responsible for aggregating the results derived by business workflow from composed microservice. API Gateway and Aggregation API gateway with added features results in overambitious gateways that encourage designs that continue to be difficult to test and deploy. It is highly recommended to avoid aggregation and data transformation in the API Gateway. Domain smarts are better suited to be done in application code that follows the defined software development practices. Netflix API Gateway, Zuul 2 removed a lot of the business logic from Gateway that they had in Zuul to origin systems. For more details, refer here. Service Mesh and API Gateway Service mesh in microservices is a configurable network infrastructure layer that handles interprocess communication. This is akin to what is often termed as sidecar proxy or sidecar gateway. It provides a lot of functionalities such as:

• reference-architecture

  11 1,650 9.2

  The Reference Architecture for Agility is a technology-neutral logical architecture based on a disaggregated cloud-based model.

  

References: https://microservices.io/index.html https://docs.microsoft.com/en-us/azure/architecture/ https://github.com/wso2/reference-architecture/blob/master/api-driven-microservice-architecture.md https://tsh.io/blog/design-patterns-in-microservices-api-gateway-bff-and-more/ https://www.infoq.com/articles/service-mesh-ultimate-guide/ https://samnewman.io/patterns/architectural/bff/ https://netflixtechblog.com/

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

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