What is Spring Cloud Config Server and why is centralized configuration important? स्प्रिंग क्लाउड कॉन्फिग सर्वर क्या है और केंद्रीकृत कॉन्फिगरेशन क्यों महत्वपूर्ण है?

In a microservices system with dozens of services, each with its own environment-specific properties, managing configuration per-service becomes unmanageable and makes rotating a shared value (like a database URL) require redeploying every service individually.

Spring Cloud Config Server centralizes configuration in one place — typically a Git repository — and serves it to every microservice at startup over HTTP. Each service, acting as a Config Client, fetches its configuration from the Config Server based on its application name and active profile, and combined with Spring Cloud Bus, configuration changes can even be broadcast to running services without a restart.

@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication { ... }

spring:
  config:
    import: "configserver:http://localhost:8888"