ocelot api gateway vs azure api gateway

Usually, an API gateway will do the following: Authentication and Rate Limiting. Again, a facade or API in between the mobile app and the microservices can be convenient for this scenario. Therefore, having an intermediate level or tier of indirection (Gateway) can be convenient for microservice-based applications. The example depicts a simplified architecture with multiple fine-grained API Gateways. /azure/architecture/microservices/gateway, Aggregation and composition pattern Kong vs Ocelot: What are the differences? This aspect is another reason why a better approach is to have several fined-grained API Gateways that respond to different client needs. After the initial architecture and patterns explanation sections, the next sections explain how to implement API Gateways with Ocelot. When splitting the API Gateway tier into multiple API Gateways, if your application has multiple client apps, that can be a primary pivot when identifying the multiple API Gateways types, so that you can have a different facade for the needs of each client app. You might do this functionality by aggregating data from multiple microservices and returning a single set of data, and sometimes eliminating any data in the response that isn't needed by the mobile app. If the API Gateway is developed by a single team, there can be a development bottleneck. It is designed to work with .NET Core only and is currently built to netcoreapp2.0. Using a direct client-to-microservice communication architecture. For more information, see Gateway routing pattern. These features let you enforce flexible and fine-grained quotas and rate limits, modify the shape and behavior of your APIs using policies, and improve performance with response caching. The main reason to choose Ocelot for the eShopOnContainers reference application 2.0 is because Ocelot is a .NET Core lightweight API Gateway that you can deploy into the same application deployment environment where you're deploying your microservices/containers, such as a Docker Host, Kubernetes, etc. However, if the API Gateway is just applying security, logging, and versioning (as when using Azure API Management), this additional development cost might not apply. The previous diagrams showing custom API Gateways running in containers are precisely how you can also run Ocelot in a container and microservice-based application. Importante. There’s quite a few API Gateways … When you design and build large or complex microservice-based applications with multiple client apps, a good approach to consider can be an API Gateway. This approach reduces latency, since multiple pieces of data come back in parallel and some UI can show data as soon as it's ready. Developers must update the API Gateway in order to expose each microservice's endpoints. If your application has many microservices, handling so many endpoints from the client apps can be a nightmare. The reference microservice application eShopOnContainers is currently using features provided by Envoy to implement the API Gateway instead of the earlier referenced Ocelot. Security issues: Without a gateway, all the microservices must be exposed to the "external world", making the attack surface larger than if you hide internal microservices that aren't directly used by the client apps. Part 1: API Gateway in a Nutshell. Streamline your work across hybrid and multi-cloud environments with a single place for managing all your APIs. https://azure.microsoft.com/services/api-management/, Udi Dahan. The main benefit and goal of this design pattern is to reduce chattiness between the client apps and the backend API, which is especially important for remote apps out of the datacenter where the microservices live, like mobile apps or requests coming from SPA apps that come from JavaScript in client remote browsers. But in larger applications you should also go further and create other API Gateways based on business boundaries as a second design pivot. - leoguilen/ocelot_api-gateway The smaller the attack surface is, the more secure your application can be. An API Gateway can introduce increased response time due to the additional network call. 3scale's API Management platform provides services and solutions, allowing you to Operate, Manage and Distribute your APIs. Therefore, requests must be performed through protocols like HTTP/HTTPS and translated to the other protocols afterwards. It is aimed at people using .NET running a micro services / service oriented architecture that need a unified point of entry into their system. Ocelot. The API Gateway pattern is also sometimes known as the "backend for frontend" (BFF) because you build it while thinking about the needs of the client app. With a bit of research I found this awesome package for .net core called Ocelot which is basically a gateway with very simple configuration required. In this article, we are going to use Ocelot and .NET Core Web API for API Gateway implementation and HashiCorp Consul for service discovery. nginx [engine x] is an HTTP and reverse proxy server, as well as a mail proxy server, written by Igor Sysoev. Figure 4-14. This approach increases latency and complexity on the UI side. A possible approach is to use a direct client-to-microservice communication architecture. Maybe you will ask the question, what is API Gateway. Too many round trips: A single page/screen in the client app might require several calls to multiple services. A possible approach is to have those services within the Docker host or internal cluster to restrict direct access to them from the outside, and to implement those cross-cutting concerns in a centralized place, like an API Gateway. API Gateway is an entry to our systems. An example of a URL for a particular service could be the following URL in Azure: http://eshoponcontainers.… Using a microservices API Gateway creates an additional possible single point of failure. We'll explore here: Azure API Management (as shown in Figure 4-14) not only solves your API Gateway needs but provides features like gathering insights from your APIs. An API Gateway requires additional development cost and future maintenance if it includes custom logic and data aggregation. Ocelot API Gateway using ASP.NET Core, Mac OSX and Visual Studio Code. According to Netcraft nginx served or proxied 30.46% of the top million busiest sites in Jan 2018. Moreover, implementation changes in the internal microservices might cause code changes at the API Gateway level. Using a direct client-to-microservice communication architecture In this approach, each microservice has a public endpoint, sometimes with a different TCP port for each microservice. Centralização dos logs de serviços em execução com Seq. It acts as a reverse proxy, routing requests from clients to services. That's why it's very much recommended to split the API Gateway in multiple services or multiple smaller API Gateways, one per client app form-factor type, for instance. Nginx and HAProxy will typically run in containers inside the cluster, but can also be deployed to dedicated VMs outside of the cluster. https://microservices.io/patterns/apigateway.html, API Gateway pattern And since it's based on .NET Core, it's cross-platform allowing you to deploy on Linux or Windows. /external and /internal 2. In a production environment based on a cluster, that URL would map to the load balancer used in the cluster, which in turn distributes the requests across the microservices. If it does, it acts as a monolithic aggregator or orchestrator and violates microservice autonomy by coupling all the microservices. It's similar to the Facade pattern from object-oriented design, but in this case, it's part of a distributed system. Ocelot: Awesome API Gateway. Caddy vs Kong vs Tyk as an API Gateway. https://microservices.io/patterns/data/api-composition.html, Azure API Management This approach improves the load of your hosts by offloading CPU-intensive SSL termination and other routing duties to the Azure Application Gateway. Ocelot is fast, scalable and provides mostly all features you consider as mandatory when building an API gateway. In production environments, you could have an Application Delivery Controller (ADC) like Azure Application Gateway between your microservices and the Internet. In an Ocelot API Gateway you can sit the authentication service, such as an ASP.NET Core Web API service using IdentityServer providing the auth token, either out or inside the API Gateway. However it will work with anything that speaks HTTP and run on any platform that ASP.NET Core supports. Cross-cutting concerns: Each publicly published microservice must handle concerns such as authorization and SSL. In an Ocelot API Gateway you can sit the authentication service, such as an ASP.NET Core Web API service using IdentityServer providing the auth token, either out or inside the API Gateway. O Amazon API Gateway é um serviço gerenciado que permite que desenvolvedores criem, publiquem, mantenham, monitorem e protejam APIs em qualquer escala com facilidade. - No public GitHub repository available -. API management, design, analytics, and security are at the heart of modern digital architecture. It's lightweight, fast, and scalable and provides routing and authentication among many other features. APIs agem como a “porta de entrada” para aplicativos acessarem dados, lógica … Kong controls layer 4 and 7 traffic and is extended through Plugins, which provide extra functionality and services beyond the core platform. Ocelot is a lightweight API Gateway, recommended for simpler approaches. IBM DataPower Gateway is most compared with IBM API Connect, IBM Integration Bus, Apigee, Mule ESB and NGINX Plus, whereas Microsoft Azure API Management is most compared with Apigee, Mulesoft Anypoint API Manager, Amazon API Gateway, Kong Enterprise and 3scale API Management. An API gateway acts as an API front-end, receives API requests, enforces throttling and security policies, redirects requests to the backend service, and then returns the response to the requester. The following outputs are obtained by running the services in Azure. An API Gateway can offer multiple features. In addition, there are many other products in the market offering API Gateways features, such as Apigee, Kong, MuleSoft, WSO2, and other products like Linkerd and Istio for service mesh ingress controller features. In any case, a load balancer and ADC are transparent from a logical application architecture point of view. The most important drawback is that when you implement an API Gateway, you're coupling that tier with the internal microservices. This project is aimed at people using .NET running a micro services / service oriented architecture that need a unified point of entry into their system. The API of multiple microservices might not be well designed for the needs of different client applications. Usually it isn't a good idea to have a single API Gateway aggregating all the internal microservices of your application. For instance, the needs of a mobile app might be different than the needs of a web app. API Management provides the core competencies to ensure a successful API program through developer engagement, business insights, analytics, security, and protection. If that consumption is performed directly, the client needs to handle multiple calls to microservice endpoints.

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