API gateways serve as the entry point for microservices architectures, solving key challenges around request routing and authentication. The post demonstrates two implementation approaches: Spring Cloud Gateway for Java applications and Kubernetes Ingress for containerized environments. Both solutions centralize authentication logic, eliminating the need for individual services to handle JWT validation, and provide intelligent request routing based on URL paths. The tutorial includes practical code examples and demos showing how to configure routing rules, implement JWT authentication interceptors, and deploy services with proper ingress configurations.
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