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This article mainly explains "what's the difference between service mesh and api gateway". Interested friends might as well take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "what's the difference between service mesh and api gateway?"

API Gateway: expose the service to the outside as a managed api

The core goal of api gateway is to expose micro-services to external systems as managed api. We develop api or boundary services at the api gateway layer to provide specific business functions.

The api/ boundary service invokes downstream micro-services and contains a composition of multiple downstream services of business logic.

Api/ boundary services also need to invoke downstream services in a flexible manner and apply a variety of stability-related modules, such as circuit breakers, timeouts, load balancing / failover, and so on. Most api gateway solutions have these modules or functions built into them.

Api gateway often includes built-in service discovery, analysis (metrics, monitoring, distributed logging, distributed tracking), and security.

Api gateway often collaborates with other components in the api management ecosystem, such as the api Store and the api distribution portal.

Service mesh

So let's see how service mesh is different.

We can think of service mesh as the network communication infrastructure, which allows us to strip most of the application network functions from the service code.

Under service mesh, when we deal with service-to-service communication, we do not need to deliberately implement flexible communication features such as circuit breakers and timeouts in the service code. Similarly, service mesh provides service discovery, monitoring and other functions.

Api gateway and service mesh

The biggest difference between api gateway and service mesh is that api gateway is a key part of exposing api/ boundary services, while service mesh is just an infrastructure for communication between services and does not contain any business concepts.

The figure above illustrates where api gateway and service mesh are located. In addition to the differences mentioned above, there is a lot of overlap between api gateway and service mesh, but it is important to note that they address different requirements and requirements.

In the figure, service mesh is deployed with other services in a sidecar situation, independent of the business functions of the services.

Api gateway hosts all api services and is part of the business function solution. Api gateway may include support for communication between services, but it does not affect api gateway to invoke downstream services through service mesh.

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