一、开发注册中心eureka服务
添加依赖
org.springframework.cloud
spring-cloud-starter-netflix-eureka-server
org.springframework.boot
spring-boot-starter-actuator
application.properties配置文件
#应用名称
spring.application.name=eureka-server
#端口号
server.port=8761
#HOST地址
spring.cloud.client.ipAddress=192.168.22.78
#注册中心地址
eureka.client.service-url.default-zone=http://${spring.cloud.client.ipAddress}:${server.port}/eureka/
#不向注册中心注册自己
eureka.client.register-with-eureka=false
#不从注册中心获取注册信息
eureka.client.fetch-registry=false
启动类中增加启用注册中心服务
//启用注册中心
@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServerApplication.class, args);
}
}
二：开发服务提供者PROVIDER-USER
添加依赖
org.springframework.boot
spring-boot-starter-actuator
org.springframework.boot
spring-boot-starter-data-jpa
org.springframework.boot
spring-boot-starter-web
org.springframework.cloud
spring-cloud-starter-netflix-eureka-client
application.properties配置文件
#应用名称
spring.application.name=provider-user
#端口号
server.port=8000
#HOST地址
spring.cloud.client.ipAddress=192.168.22.78
#注册中心地址
eureka.client.service-url.default-zone=http://192.168.22.78:8761/eureka/
eureka.instance.prefer-ip-address=true
eureka.instance.metadata-map.my-metadata:我自定义的元数据
#数据库配置
spring.jpa.generate-ddl=false
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.datasource.platform=h2
spring.datasource.schema=classpath:sql/schema.sql
spring.datasource.data=classpath:sql/data.sql
#配置日志
logging.level.root=INFO
logging.level.org.hibernate=INFO
logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE
logging.level.org.hibernate.type.descriptor.sql.BasicExtractor=TRACE
#配置info端点信息
[email protected]@
[email protected]@
info.app.java.source=${java.version}
info.app.java.target=${java.version}
启动类中增加启用注册中心服务
@SpringBootApplication
//启用注册中心
@EnableDiscoveryClient
public class ProviderUserApplication {
public static void main(String[] args) {
SpringApplication.run(ProviderUserApplication.class, args);
}
}
开发对外接口查询用户信息
@RestController
public class UserController {
@Autowired
private UserRepository userRepository;
@GetMapping("/{id}")
public User findById(@PathVariable Long id){
Optional op = userRepository.findById(id);
return op.get();
}
}
三：开发消费者CONSUMER-MOVIE
添加依赖
org.springframework.boot
spring-boot-starter-actuator
org.springframework.cloud
spring-cloud-starter-netflix-hystrix
org.springframework.cloud
spring-cloud-starter-netflix-hystrix-dashboard
org.springframework.boot
spring-boot-starter-web
org.springframework.cloud
spring-cloud-starter-netflix-eureka-client
application.properties配置文件
#应用名称
spring.application.name=consumer-movie
#端口号
server.port=8010
#注册中心地址
eureka.client.service-url.default-zone=http://192.168.22.78:8761/eureka/
eureka.instance.prefer-ip-address=true
启动类中增加启用注册中心服务
@EnableDiscoveryClient
@SpringBootApplication
@EnableCircuitBreaker
public class ConsumerMovieApplication {
@Bean
@LoadBalanced
public RestTemplate restTemplate(){
return new RestTemplate();
}
// SpringBoot2.0以后，不提供 hystrix.stream节点，需要自己增加
@Bean
public ServletRegistrationBean getServlet(){
HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
registrationBean.setLoadOnStartup(1);
registrationBean.addUrlMappings("/actuator/hystrix.stream");
registrationBean.setName("HystrixMetricsStreamServlet");
return registrationBean;
}
public static void main(String[] args) {
SpringApplication.run(ConsumerMovieApplication.class, args);
}
}
调用PROVIDER-USER接口，查询用户信息
@RestController
public class MovieController {
private static final Logger logger = LoggerFactory.getLogger(MovieController.class);
@Autowired
private RestTemplate restTemplate;
@Autowired
private DiscoveryClient discoveryClient;
@GetMapping("/user/{id}")
@HystrixCommand(fallbackMethod = "findByIdFallback")
public User findById(@PathVariable Long id) {
return this.restTemplate.getForObject("http://PROVIDER-USER/" + id, User.class);
}
public User findByIdFallback(Long id){
User user = new User();
user.setId(-1L);
user.setName("默认用户");
return user;
}
@GetMapping("/user-instance")
public List showInfo() {
return this.discoveryClient.getInstances("PROVIDER-USER");
}
}
四：开发消费者二CONSUMER-MOVIE-FEGIN-CLIENT
具体步骤同第三步
五、开发监控平台
添加依赖
org.springframework.cloud
spring-cloud-starter-netflix-hystrix-dashboard
application.properties配置文件
#端口号
server.port=8030
启动类中增加启用注册中心服务
@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardApplication {
public static void main(String[] args) {
SpringApplication.run(HystrixDashboardApplication.class, args);
}
}
六、开发聚合服务Turbine
添加依赖
org.springframework.boot
spring-boot-starter-actuator
org.springframework.cloud
spring-cloud-starter-netflix-hystrix
org.springframework.cloud
spring-cloud-starter-netflix-turbine
application.properties配置文件
#端口号
server.port=8031
#项目名称
spring.application.name=hystrix-turbine
#注册中心地址
eureka.client.service-url.default-zone=http://192.168.22.78:8761/eureka/
eureka.instance.prefer-ip-address=true
#turbine聚合
# 指定聚合哪些集群，多个使用","分割，默认为default。可使用http://.../turbine.stream?cluster={clusterConfig之一}访问
turbine.aggregator.cluster-config=default
turbine.cluster-name-expression= new String("default")
turbine.app-config=consumer-movie,consumer-movie-fegin-client
#这里和被监控启动类里的 registrationBean.addUrlMappings("/hystrix.stream")一致
turbine.instanceUrlSuffix=/actuator/hystrix.stream
启动类中增加启用注册中心服务
@SpringBootApplication
@EnableTurbine
public class HystrixTurbineApplication {
public static void main(String[] args) {
SpringApplication.run(HystrixTurbineApplication.class, args);
}
}
七、启动查看结果
1、启动项目：eureka-server
2、启动项目：provider-user
3、启动项目：consumer-movie
4、启动项目：consumer-movie-fegin-client
5、启动项目：hystrix-dashboard
6、启动项目：hystrix-turbine
7、访问http://localhost:8010/user/1让consumer-movie微服务产生监控数据。
8、访问http://localhost:8011/user/1让consumer-movie-fegin-client微服务产生监控数据。
9、打开Hystrix Dashboard 首页 http://localhost:8030/hystrix,在URL一栏填入http://localhost:8031/turbine.stream，随意指定一个Title并点击Monitor Stream按钮，结果类似于下图
image.png