Managing configuration for 10 services across 3 environments means 30 separate config files. Spring Cloud Config Server centralizes all of them — one place to change a database URL, one place to rotate secrets, and services pick up changes without redeployment. Config Server Setup <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> @SpringBootApplication @EnableConfigServer public class ConfigServerApplication { public static void main(String[] args) { SpringApplication.run(ConfigServerApplication.class, args); } } # application.yml — config-server server: port: 8888 spring: application: name: config-server cloud: config: server: git: uri: https://github.