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SpringCloud微服務實戰

Tamic / 967人閱讀

摘要：序主要有做服務發現做分布式配置做做客戶端負載均衡做斷路器做聚合的做指標監控。配置訪問配置訪問實例調用其他微服務使用使用訪問轉向使用訪問配置的目前看來每秒發送一次貌似太頻繁可以另起一個進行訪問參考

序

主要有eureka做服務發現、config做分布式配置、zuul做api-gateway、feign做客戶端負載均衡、hystrix做斷路器、turbine做聚合的monitor、graphite做指標監控。

eureka

pom配置


        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-actuator
        
        
            org.springframework.cloud
            spring-cloud-starter-eureka-server
        
        
            junit
            junit
            test

application.yml

server:
  port: 8761

eureka:
  instance:
    hostname: discovery
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://discovery:${server.port}/eureka/

spring.cloud.config.discovery.enabled: true

bootstrap.yml

spring:
  application:
    name: discovery

application

@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {
    public static void main( String[] args ) {
        SpringApplication.run(EurekaApplication.class, args);
    }
}

訪問

http://192.168.99.100:8761/

config

pom配置


        
            org.springframework.cloud
            spring-cloud-starter
        
        
            org.springframework.cloud
            spring-cloud-config-server
        
        
            org.springframework.cloud
            spring-cloud-starter-eureka

application.yml

spring:
  cloud:
    config:
      server:
        native:
          search-locations: classpath:/config

server:
  port: 8888

bootstrap.yml

spring:
  application:
    name: config
  profiles:
    active: native
    
eureka:
  instance:
    preferIpAddress: true
  client:
    service-url:
      defaultZone: http://discovery:8761/eureka/

application

@SpringBootApplication
@EnableConfigServer
@EnableEurekaClient
public class ConfigApplication {
    public static void main( String[] args ) {
        SpringApplication.run(ConfigApplication.class,args);
    }
}

訪問

http://192.168.99.100:8888/review/default/master

feign實例

pom


        
            org.springframework.cloud
            spring-cloud-starter
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-actuator
        
        
            org.springframework.cloud
            spring-cloud-config-client
        
        
            org.springframework.cloud
            spring-cloud-starter-eureka
        
        
            com.codecraft
            common
            1.0-SNAPSHOT
        

        
        
            org.springframework.cloud
            spring-cloud-starter-ribbon
        
        
            org.springframework.cloud
            spring-cloud-starter-feign
        

        
        
            org.springframework.cloud
            spring-cloud-starter-hystrix
        
        
            org.springframework.cloud
            spring-cloud-starter-hystrix-dashboard

application.yml

server:
  port: 9001

endpoints:
  restart:
    enabled: true
  shutdown:
    enabled: true
  health:
    sensitive: false

ribbon:
  eureka:
    enabled: true

bootstrap.yml

spring:
  application:
    name: product
  cloud:
    config:
      uri: http://config:8888
encrypt:
  failOnError: false

eureka:
  instance:
    preferIpAddress: true
  client:
    registerWithEureka: true
    fetchRegistry: true
    serviceUrl:
      defaultZone: http://discovery:8761/eureka/

FeignClient

@FeignClient("recommend")
public interface RemoteRecommendService {
    @RequestMapping(method = RequestMethod.GET,value = "/recommend")
    public List getRecommendations(
            @RequestParam(value = "productId",  required = true) int productId);
}

feign使用

@RestController
public class ProductController {

    private static final Logger LOG = LoggerFactory.getLogger(ProductController.class);

    @Autowired
    private SetProcTimeBean setProcTimeBean;

    @Autowired
    RemoteRecommendService remoteRecommendService;

    @RequestMapping("/product/recommends")
    @HystrixCommand(fallbackMethod = "callRecommendFallback", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "100")
    })
    public List remoteRecommends(@RequestParam(value = "productId",  required = true) int productId){
        return remoteRecommendService.getRecommendations(productId);
    }

    public List callRecommendFallback(int productId) {
        return Collections.emptyList();
    }

    @RequestMapping("/product/{productId}")
    public Product getProduct(@PathVariable int productId) {

        int pt = setProcTimeBean.calculateProcessingTime();
        LOG.info("/product called, processing time: {}", pt);

        sleep(pt);

        LOG.debug("/product return the found product");
        return new Product(productId, "name", 123);
    }
}

application

@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableCircuitBreaker
@EnableHystrix
@EnableHystrixDashboard
public class ProductApplication {
    private static final Logger LOG = LoggerFactory.getLogger(ProductApplication.class);

    public static void main(String[] args){
        SpringApplication.run(ProductApplication.class,args);
        LOG.info("Register ShutdownHook");
        Runtime.getRuntime().addShutdownHook(new Thread(){
            @Override
            public void run() {
                LOG.info("Shutting down product service, unregister from Eureka!");
                DiscoveryManager.getInstance().shutdownComponent();
            }
        });
    }
}
api-gateway

pom


        
            org.springframework.cloud
            spring-cloud-starter-zuul
        
        
            org.springframework.cloud
            spring-cloud-starter-eureka
        
        
            org.springframework.cloud
            spring-cloud-starter
        
        
            org.springframework.cloud
            spring-cloud-starter-config
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-actuator

application.yml

server:
  port: 10000

#sidecar:
  #port: 8000

endpoints:
  restart:
    enabled: true
  shutdown:
    enabled: true
  health:
    sensitive: false


zuul:
  ignored-services: "*"
  routes:
    product:
      path: /product/**
      url: http://product:9001/product
    recommend:
      path: /recommend/**
      url: http://recommend:9002/recommend
    review:
      path: /review/**
      url: http://review:9003/review

bootstrap.yml

spring:
  application:
    name: gateway
  cloud:
    config:
      uri: http://config:8888
encrypt:
  failOnError: false

eureka:
  instance:
    preferIpAddress: true
  client:
    registerWithEureka: true
    fetchRegistry: true
    serviceUrl:
      defaultZone: http://discovery:8761/eureka/

application

@SpringBootApplication
@EnableCircuitBreaker
@EnableDiscoveryClient
@EnableZuulProxy
public class ApiGatewayApplication {
    public static void main( String[] args ) {
        new SpringApplicationBuilder(ApiGatewayApplication.class).web(true).run(args);
    }
}

訪問

http://192.168.99.100:10000/recommend?productId=1
轉向
http://192.168.99.100:9002/recommend?productId=1

hystrix

http://192.168.99.100:9001/product/recommends?productId=1
http://192.168.99.100:9001/hystrix

http://192.168.99.100:9003/hystrix/monitor?stream=http%3A%2F%2F192.168.99.100%3A9001%2Fhystrix.stream

turbine

pom


        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.cloud
            spring-cloud-starter
        
        
            org.springframework.cloud
            spring-cloud-starter-turbine
        
        
            org.springframework.boot
            spring-boot-starter-actuator
        
        
            org.springframework.cloud
            spring-cloud-config-client
        
        
            org.springframework.cloud
            spring-cloud-starter-eureka
        

        
        
            org.springframework.cloud
            spring-cloud-starter-hystrix
        
        
            org.springframework.cloud
            spring-cloud-starter-hystrix-dashboard

application.yml

server:
  port: 8889

eureka:
  instance:
    preferIpAddress: true
  client:
    registerWithEureka: true
    fetchRegistry: true
    serviceUrl:
      defaultZone: http://discovery:8761/eureka/

turbine:
  appConfig: product,review
  clusterNameExpression: new String("default")

bootstrap.yml

spring:
  application:
    name: turbine
  cloud:
    config:
      uri: http://config:8888
encrypt:
  failOnError: false

application

@SpringCloudApplication
@EnableTurbine
@EnableHystrixDashboard
public class TurbineApplication {
    public static void main(String[] args){
        SpringApplication.run(TurbineApplication.class,args);
    }
}

訪問

http://192.168.99.100:9001/hystrix

http://192.168.99.100:9001/product/recommends?productId=1
http://192.168.99.100:9003/review/product/100

graphite配置

pom


        
            org.springframework.boot
            spring-boot-starter-actuator
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
        
            io.dropwizard.metrics
            metrics-core
            ${dropwizard-metrics.version}
        
        
            io.dropwizard.metrics
            metrics-graphite
            ${dropwizard-metrics.version}
        
        
            io.dropwizard.metrics
            metrics-annotation
            ${dropwizard-metrics.version}
        
        
            io.dropwizard.metrics
            metrics-jvm
            ${dropwizard-metrics.version}
        

        
            com.ryantenney.metrics
            metrics-spring
            3.1.0
            
                
                    spring-beans
                    org.springframework
                
                
                    spring-aop
                    org.springframework

configuration

@Configuration
@AutoConfigureAfter(MetricRepositoryAutoConfiguration.class)
@ConditionalOnProperty(prefix = "graphite", name = "enabled", matchIfMissing = true)
@EnableConfigurationProperties(GraphiteProperties.class)
@EnableScheduling
@EnableMetrics
public class GraphiteAutoConfiguration {

    private static final Logger logger = LoggerFactory.getLogger(GraphiteAutoConfiguration.class);

    @Bean
    public MetricsConfigurerAdapter metricsConfigurerAdapter(final GraphiteProperties graphiteProperties) {
        return new GraphiteReportingManager(graphiteProperties);
    }

    /**
     * https://qbgbook.gitbooks.io/spring-boot-reference-guide-zh/content/IV.%20Spring%20Boot%20features/36.3.3.%20Property%20conditions.html
     * @param graphiteProperties
     * @param metricRegistry
     * @return
     */
    @Bean
    @ConditionalOnProperty(value = "graphite.host",matchIfMissing = true)
    public ConsoleReporter consoleReporter(GraphiteProperties graphiteProperties,MetricRegistry metricRegistry) {
        ConsoleReporter.Builder builder = ConsoleReporter.forRegistry(metricRegistry);
        ConsoleReporter reporter = builder.build();
        reporter.start(graphiteProperties.getReportInterval(), TimeUnit.MILLISECONDS);
        return reporter;
    }
}

report

public class GraphiteReportingManager extends MetricsConfigurerAdapter implements DisposableBean {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    private GraphiteProperties props;


    public GraphiteReportingManager(GraphiteProperties props) {
        this.props = props;
    }

    @Override
    public void configureReporters(MetricRegistry metricRegistry) {
        //gc的metrics,目前看來每秒發送一次貌似太頻繁,可以另起一個reporter進行
        metricRegistry.register("jvm.gc", new GarbageCollectorMetricSet());
        metricRegistry.register("jvm.mem", new MemoryUsageGaugeSet());
        metricRegistry.register("jvm.thread-states", new ThreadStatesGaugeSet());

        logger.info("graphite host:{},port:{}", props.getHost(), props.getPort());
        GraphiteReporter reporter = GraphiteReporter.forRegistry(metricRegistry)
                .prefixedWith(props.getPrefix())
//                        .convertRatesTo(TimeUnit.SECONDS)
                .convertDurationsTo(TimeUnit.MILLISECONDS)
                .filter(MetricFilter.ALL)
                .build(createSender(props));
        registerReporter(reporter);
        reporter.start(1L, TimeUnit.SECONDS);
    }

    @Override
    public void destroy() throws Exception {
        super.destroy();
    }

    private GraphiteSender createSender(GraphiteProperties props) {
        switch (props.getSenderType()) {
            case udp:
                return new GraphiteUDP(props.getHost(), props.getPort());
            case tcp:
                return new Graphite(props.getHost(), props.getPort());
            case pickled:
                return new PickledGraphite(props.getHost(), props.getPort());
            default:
                return new GraphiteUDP(props.getHost(), props.getPort());
        }
    }

}

訪問

http://192.168.99.100:8070/

參考

Blog Series - Building Microservices

git.blog-microservices

exposing-jvm-metrics-in-spring-boot

git.spring-boot-jvm-monitoring-demo

exporting-to-graphite-with-the-prometheus-java-client

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