SpringCloud-Eurek 實作服務治理服務搭建

非叢集實作

1.Eurek 伺服器端實作--注冊中心：

<properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.RELEASE</spring-cloud.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>      

application.yml 注冊中心配置

###服務端口号
server:
  port: 8100
###eureka 基本資訊配置
eureka:
  instance:
    ###注冊到eurekaip位址
    hostname: 127.0.0.1
  client:
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
    ###因為自己是為注冊中心，不需要自己注冊自己
    register-with-eureka: false
    ###因為自己是為注冊中心，不需要檢索服務
    fetch-registry: false      

啟動Eureka服務：

@EnableEurekaServer
@SpringBootApplication
public class AppEureka {

  public static void main(String[] args) {
    SpringApplication.run(AppEureka.class, args);
  }

}      

注冊服務提供者：

<!-- 管理依賴 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- SpringBoot整合Web元件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka用戶端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>
    <!-- 注意： 這裡必須要添加， 否者各種依賴有問題 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>      

application.yml 檔案配置

###服務啟動端口号
server:
  port: 8010
###服務名稱(服務注冊到eureka名稱)
spring:
  application:
    name: api-node1-member
###服務注冊到eureka位址
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8100/eureka

    ###因為該應用為注冊中心，不會注冊自己
    register-with-eureka: true
    ###是否需要從eureka上擷取注冊資訊
    fetch-registry: true      

服務消費者服務配置

Maven依賴資訊

<!-- 管理依賴 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- SpringBoot整合Web元件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka用戶端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

    </dependencies>      

###服務啟動端口号
server:
  port: 8001
###服務名稱(服務注冊到eureka名稱)
spring:
  application:
    name: app-node-order
###服務注冊到eureka位址
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8100/eureka


    ###因為該應用為注冊中心，不會注冊自己
    register-with-eureka: true
    ###是否需要從eureka上擷取注冊資訊
    fetch-registry: true      

使用rest方式調用服務

@RestController
public class OrderController {
  @Autowired
  private RestTemplate restTemplate;

  @RequestMapping("/getorder")
  public String getOrder() {
    // order 使用rpc 遠端調用技術 調用 會員服務
    String memberUrl = "http://app-itmayiedu-member/getMember";
    String result = restTemplate.getForObject(memberUrl, String.class);
    System.out.println("會員服務調用訂單服務,result:" + result);
    return result;
  }

}      

啟動消費者服務

@SpringBootApplication
@EnableEurekaClient
public class AppOrder {

  public static void main(String[] args) {
    SpringApplication.run(AppOrder.class, args);
  }

  @Bean
  @LoadBalanced
  RestTemplate restTemplate() {
    return new RestTemplate();
  }

}