SpringCloud of service registration -Eureka

Spring Cloud Eureka is part of the Spring Cloud Netflix Micro suite of services, which is based Netflix Eureka made a second package, is responsible for completion of the service management function micro-service architecture. Spring Cloud increased by as Eureka Spring Boot-style automated provisioning, we only need to rely on a simple introduction and annotation configuration can make micro-service applications Spring Boot built to easily integrate with Eureka service governance system.
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Eureka single

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<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>

applicaiton.properties

server.port=8088

eureka.instance.hostname=localhost
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

You must configure the eureka.instance.hostnameotherwise self-registration will try to Eureka

EurekaSpringBootApplication

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

After starting the project visit http: // localhost: 8088 /
Configuration instructions

Configuration	Explanation	default
eureka.server.enable-self-preservation	Eureka self-protection mechanism	true
eureka.server.eviction-interval-timer-in-ms Eureka	Excluding a failed node interval	60 seconds
eureka.server.renewal-percent-threshold	Calculating the threshold Eureka lease	0.85
eureka.client.register-with-eureka	It is registered to Eureka	true
eureka.client.fetch-registry	Whether to update the list of information from Eureka	true
eureka.instance.hostname	Hostname micro service instance Eureka	no

Service Registration

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<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

application.properties

spring.application.name=USER-SERVICE
eureka.instance.instance-id=001
eureka.instance.prefer-ip-address=true
eureka.instance.lease-expiration-duration-in-seconds=20
eureka.instance.lease-renewal-interval-in-seconds=10

eureka.client.register-with-eureka=true
eureka.client.healthcheck.enabled=true
eureka.client.fetch-registry=false
eureka.client.service-url.defaultZone=http://localhost:8088/eureka/

Run the project to achieve registration services

After registering two services

The introduction of dependence

Eureka Ribbon default integrated plug-in, just import spring-cloud-starter-netflix-eureka-clientcan be.

pom.xml

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.1.5.RELEASE</version>
</parent>

<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-dependencies</artifactId>
      <version>Greenwich.SR1</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>

  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>

  <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
  </dependency>

  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
  </dependency>

</dependencies>

application.properties

eureka.client.fetch-registry=true
eureka.client.register-with-eureka=false
eureka.client.service-url.defaultZone=http://localhost:8088/eureka/

EurekaSpringBootConsumer

@SpringBootApplication
public class EurekaSpringBootConsumer {
    public static void main(String[] args) {
        SpringApplication.run(EurekaSpringBootConsumer.class,args);
    }
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
       return new RestTemplate();
    }
}

Rest Template Tests

@SpringBootTest(classes = EurekaSpringBootConsumer.class)
@RunWith(SpringRunner.class)
public class RestTemplateTests {
    @Autowired
    private RestTemplate restTemplate;
    @Test
    public void testQueryUserById(){
        String url="http://USER-SERVICE/manager/user/8";
        User user = restTemplate.getForObject(url, User.class);
        System.out.println(user);
    }
}

Eureka Server Security

New dependence

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-security</artifactId>
</dependency>

New configuration

spring.security.user.name=mask
spring.security.user.password=111111

New configuration class WebSecurityConfig

@EnableWebSecurity
@Configuration
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable(); // 关闭csrf,否则其他主机无法登陆认证
    http.authorizeRequests().anyRequest().authenticated().and().httpBasic();//设置成httpBasic，不可以设置为表单
  }

}

Service Registration / New configuration consumption

eureka.client.service-url.defaultZone=http://mask:111111@localhost:8088/eureka/

Eureka high availability server configuration

application-eureka-1.properties

server.port=6666

## 指定当前注册中心的服务名称
spring.application.name=eurekaregistry

## 启用注册中心主动失效，并且每次主动失效检测间隔为5s 默认值60s
eureka.server.eviction-interval-timer-in-ms= 5000
## 设置eureka注册中心的响应更新时间
eureka.server.responseCacheUpdateIntervalMs=3000
eureka.server.responseCacheAutoExpirationInSeconds=60

## 配置注册中心的主机名
eureka.instance.instance-id = eureka-1
eureka.instance.hostname = CentOSA
## 服务刷新时间配置，每隔这个时间会主动心跳一次
eureka.instance.lease-renewal-interval-in-seconds= 5
## 服务提供者被认定为丢失心跳超时，失效多久后被删除
eureka.instance.lease-expiration-duration-in-seconds=15

## 配置定时获取|抓取注册中心的数据时间
eureka.client.registry-fetch-interval-seconds= 5
eureka.client.instance-info-replication-interval-seconds= 5
## 配置集群中其他eureka实例，用于本eureka实例的注册方。
eureka.client.region=beijing
eureka.client.availability-zones.beijing=zone-2,zone-3
eureka.client.service-url.zone-2=http://mask:111111@CentOSB:1111/eureka/
eureka.client.service-url.zone-3=http://mask:111111@CentOSC:1111/eureka/

spring.security.user.name=mask
spring.security.user.password=111111

application-eureka-2.properties

server.port=6666

## 指定当前注册中心的服务名称
spring.application.name=eurekaregistry

## 启用注册中心主动失效，并且每次主动失效检测间隔为5s 默认值60s
eureka.server.eviction-interval-timer-in-ms= 5000
## 设置eureka注册中心的响应更新时间
eureka.server.responseCacheUpdateIntervalMs=3000
eureka.server.responseCacheAutoExpirationInSeconds=60

## 配置注册中心的主机名
eureka.instance.instance-id = eureka-2
eureka.instance.hostname = CentOSB
## 服务刷新时间配置，每隔这个时间会主动心跳一次
eureka.instance.lease-renewal-interval-in-seconds= 5
## 服务提供者被认定为丢失心跳超时，失效多久后被删除
eureka.instance.lease-expiration-duration-in-seconds=15

## 配置定时获取|抓取注册中心的数据时间
eureka.client.registry-fetch-interval-seconds= 5
eureka.client.instance-info-replication-interval-seconds= 5
## 配置集群中其他eureka实例，用于本eureka实例的注册方。
eureka.client.region=beijing
eureka.client.availability-zones.beijing=zone-1,zone-3
eureka.client.service-url.zone-1=http://mask:111111@CentOSA:1111/eureka/
eureka.client.service-url.zone-3=http://mask:111111@CentOSC:1111/eureka/

spring.security.user.name=mask
spring.security.user.password=111111

application-eureka-3.properties

server.port=6666

## 指定当前注册中心的服务名称
spring.application.name=eurekaregistry

## 启用注册中心主动失效，并且每次主动失效检测间隔为5s 默认值60s
eureka.server.eviction-interval-timer-in-ms= 5000
## 设置eureka注册中心的响应更新时间
eureka.server.responseCacheUpdateIntervalMs=3000
eureka.server.responseCacheAutoExpirationInSeconds=60

## 配置注册中心的主机名
eureka.instance.instance-id = eureka-3
eureka.instance.hostname = CentOSC
## 服务刷新时间配置，每隔这个时间会主动心跳一次
eureka.instance.lease-renewal-interval-in-seconds= 5
## 服务提供者被认定为丢失心跳超时，失效多久后被删除
eureka.instance.lease-expiration-duration-in-seconds=15

## 配置定时获取|抓取注册中心的数据时间
eureka.client.registry-fetch-interval-seconds= 5
eureka.client.instance-info-replication-interval-seconds= 5
## 配置集群中其他eureka实例，用于本eureka实例的注册方。
eureka.client.region=beijing
eureka.client.availability-zones.beijing=zone-1,zone-2
eureka.client.service-url.zone-1=http://mask:111111@CentOSA:1111/eureka/
eureka.client.service-url.zone-2=http://mask:111111@CentOSB:1111/eureka/

spring.security.user.name=mask
spring.security.user.password=111111

The three projects are packaged uploaded to CentOSA, CentOSB, CentOSC run

Note: The three machines need to turn off the firewall and make each other host names and IP mapping

Access HTTP: // CentOSA: 6666 / -CentOSA can be exchanged for ip

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