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API Gateway Module
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API Gateway Module
Core details
Title
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Description
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An API Gateway acts as a single entry point for multiple backend services, handling routing, authentication, rate limiting, and other cross-cutting concerns. It simplifies microservices architecture by abstracting service discovery and load balancing.
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Usage & Trade-offs
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When to use it
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Implement an API Gateway when: - Managing a microservices ecosystem with multiple APIs. - Needing centralized security and monitoring for all incoming requests. - Scaling traffic management across distributed services. - Exposing a unified API facade to clients.
Pros
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- Centralizes common functionalities like auth, logging, and caching. - Improves scalability by offloading concerns from individual services. - Enhances security with features like CORS, JWT validation, and IP whitelisting. - Provides protocol translation (e.g., HTTP to gRPC). - Easier client-side integration with a single endpoint.
Cons
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- Introduces a single point of failure if not highly available. - Adds latency due to an extra hop in the request flow. - Complexity in configuration and maintenance for large-scale setups. - Potential bottleneck during high traffic without proper scaling. - Debugging issues can be tricky as it proxies requests.
Notes
Note: Popular implementations include Kong, AWS API Gateway, or Zuul. Monitor gateway metrics closely to detect bottlenecks early. Use service mesh integrations for advanced traffic management.
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