spring-cloud 学习四 服务网关
API Gateway
服务网关在微服务中是一个很重要的组成部分,通过服务网关可以统一向外提供REST API,例如 / 映射到后端应用 /api/user 映射到 user service, /api/comment 映射到comment service,在spring cloud中通过集成zuul来实现这个 gateway,他提供一下功能
-
- Authentication
- Insights
- Stress Testing
- Canary Testing
- Dynamic Routing
- Service Migration
- Load Shedding
- Security
- Static Response handling
- Active/Active traffic management
我们使用两个服务,我们以user-provider-service来进行测试
我们访问http://localhost:8081/users 可以看到如下输出,8081 就是user-provider-service服务的端口
[{"id":"1","name":"陈七","tel":null},{"id":"2","name":"王六","tel":null}]
建一个api-gateway module
pom文件
<parent> <groupId>com.dh.cloud</groupId> <artifactId>spring-cloud-demo</artifactId> <version>1.0-SNAPSHOT</version> </parent> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zuul</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-sidecar</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter</artifactId> </dependency> </dependencies>
启动类
@SpringBootApplication @EnableSidecar public class AppGatewayApplication { public static void main(String[] args) { SpringApplication.run(AppGatewayApplication.class, args); } }
application.yml
server: port: 10000 sidecar: port: 8000 endpoints: restart: enabled: true shutdown: enabled: true health: sensitive: false eureka: instance: hostname: gateway client: registerWithEureka: true fetchRegistry: true serviceUrl: defaultZone: http://localhost:8761/eureka/
bootstrap.yml
spring: application: name: api-gateway cloud: config: uri: http://localhost:8888 encrypt: failOnError: false
这里使用的都是默认配置,运行代码
访问http://localhost:10000/user-provider-service/users,10000为gateway的端口
看到输出
[{"id":"1","name":"陈七","tel":null},{"id":"2","name":"王六","tel":null}]
和直接访问服务一致,到此zuul一个简单的演示就完成了