An API gateway is essential for mobile applications. Fewer requests also means less overhead and improves the user experience. API gateway enables clients to retrieve data from multiple services with a single round-trip. Reduces the number of requests/roundtrips.
Provides the optimal API for each client.Insulates the clients from the problem of determining the locations, types, authentication requirements of service instances.Insulates the clients from how the application is serving the APIs.In this context, some people call the API gateway a centralized deployment. The API gateway pattern describes an additional hop in the network that every request will have to go through in order to consume the underlying APIs. The other direction of traffic flow is North-south traffic, which typically indicates data flow that either enters/leaves the data center from/to a system physically residing outside the data center. Usually you’ll also want some kind of monitor alert if the circuit breaker trips.įrom Wikipedia: East-West traffic indicates flow of data among devices within a specific data center. Once the failures reach a certain threshold, the circuit breaker trips, and all further calls to the circuit breaker return with an error, without the protected call being made at all. You wrap a protected function call in a circuit breaker object, which monitors for failures. The basic idea behind the circuit breaker is very simple. I like Martin Fowler’s summary for the pattern:
What’s nice is that, overlapping as it is, these features make sense both in the API Management and the Service Mesh thus ultimately, they should not add to the confusion but complete the solution in a consistent way.Ĭircuit breaker is an indispensable pattern in a distributed application. What’s the confusion? Well, here’s a list of features that the API Management (API Gateway) and the Service Mesh share: Gateway describes a load balancer operating at the edge of the mesh receiving incoming or outgoing HTTP/TCP connections. But then, Istio, one of my go-to solutions out there, includes an Ingress Gateway that’s clearly intended for north-south traffic.
AZURE SENTINEL ISTIO FULL
One generally accepted and quite full of common-sense position is that the Service Mesh serves for East-West traffic. Confusion around the topic is abundant and there is no definitive white or black position for them as vendors are also confusing the functionalities for the rest of us mortals. There is both noise and religious positions around API Management and Service Mesh existence, co-existence, usage and interactions. A S ervice Mesh is more about the internal routing and resilience patterns required within an application or domain boundary. API management excels on socialization and self-subscription of APIs while ensuring security across application boundaries.
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