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Allan A. Chua Pluggable API Gateway OCELOT https://bit.ly/2HmVKq1

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Use Cases 0 0 0 0 ___ Cautions Agenda

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Products API Customers API Transactions API Orders API Deliveries API Microservices Monolith Application

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Products API Customers API Transactions API Orders API Deliveries API Microservices Expectation

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Products API Customers API Transactions API Consumers face a lot of challenges Orders API Deliveries API o X X ___

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Multiple Retrieval + Attack Points 0 0 0 0 ___ Multiple Domain Names, SSL Certs and CORS http://foo.com http://bar.com http://ses.com Authentication Hell Client-side Issues

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Products API Authentication Rate Limiting Logging Orders API Authentication Rate Limiting Caching Transactions API Authentication Logging Caching Clients / Consumers Inconsistencies and Duplications

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To solve these, API Gateways are introduced

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Products API Customers API Transactions API Orders API Deliveries API Stocks API API Gateway API Gateway to the Rescue

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Do you mean a Reverse Proxy?

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Proxying is one of the jobs of a gateway. API Gateway Authentication Rate Limiting Logging Reverse Proxy Caching Monitoring Tracing Authorization Authorization

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Centralized Cross Cutting Concerns API Gateway - Logging - Authentication - Rate Limiting / QOS - Licensing - Monitoring - Tracing

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Faster Cross- continental calls due to Response Aggregation

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ASIA Europe Cost of Communication 55 MS Latency SSL Handshake

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Consumer ASIA Europe Products Transactions Users Latency of 55 MS 55 MS x 3 = 165 MS Total Response Time W/O Gateway

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Consumer API Gateway ASIA Europe Products Transactions Users Latency of 55 MS Latency of 2 MS With Gateway Asia to EU = 55 MS EU to EU = 2 MS x 3 instances TOTAL Response Time = 61 MS

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Public / Private APIs API Gateway Orders API Stocks API Products API A C B A B A B PUBLIC PRIVATE Jobs E D C D C D

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Ocelot API Gateway - Designed for .NET Core - ASP.net Core Add-on Install-Package Ocelot https://bit.ly/2JptJBR

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Advantages of using Ocelot - Open source (Free) - Flexible - On-Premise - Cloud - Compliance Friendly - Easy to Migrate

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Feature Packed - Reverse Proxy - Response Aggregation - Service Discovery - Consul - Eureka - Kubernetes - Authentication / Authorization - Rate Limiting - Caching - QOS via Polly - Logging - Tracing

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Integrations with

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Docker Compose Demo API Gateway Products Users Transactions https://bit.ly/30e98Fx

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Downsides - No enterprise support - Framework lock-in - No API management

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Links - (API Gateway Comparables) - https://bit.ly/2KU1YCL - (API Gateway in a Nutshell) - https://bit.ly/2O4IbAU - (Ocelot Compose Demo) - https://bit.ly/30e98Fx - (Ocelot Documentation) - https://bit.ly/2KpUBCI - (Speaker Deck) - https://bit.ly/2HmVKq1