Spring Cloud中使用Eureka

一、创建00-eurekaserver-8000

（1）创建工程

创建一个Spring Initializr工程，命名为00-eurekaserver-8000，仅导入Eureka Server依赖即可

（2）pom.xml文件如下

若你使用的是JDK6、7、8，那么这些依赖无需导入。而JDK9及其以上版本需要导入

<?xml version="1.0" encoding="UTF-8"?>



<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"



         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">



    <modelVersion>4.0.0</modelVersion>




 



    <groupId>com.abc</groupId>




    <artifactId>00-eurekaserver-8000</artifactId>




    <version>0.0.1-SNAPSHOT</version>




    <packaging>jar</packaging>




 



    <parent>




        <groupId>org.springframework.boot</groupId>




        <artifactId>spring-boot-starter-parent</artifactId>




        <version>2.1.7.RELEASE</version>




        <relativePath/> <!-- lookup parent from repository -->




    </parent>




 



    <properties>




        <java.version>1.8</java.version>




        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>




    </properties>




 



    <dependencies>




        <!--JAXB，Java Architechture for Xml Binding，XML绑定的Java技术




            JDK6、7、8版本的不用导入以下依赖，但9及其以上版本需要导入



        -->



        <!--<dependency>-->




        <!--<groupId>javax.xml.bind</groupId>-->




        <!--<artifactId>jaxb-api</artifactId>-->




        <!--<version>2.2.11</version>-->




        <!--</dependency>-->




        <!--<dependency>-->




        <!--<groupId>com.sun.xml.bind</groupId>-->




        <!--<artifactId>jaxb-core</artifactId>-->




        <!--<version>2.2.11</version>-->




        <!--</dependency>-->




        <!--<dependency>-->




        <!--<groupId>com.sun.xml.bind</groupId>-->




        <!--<artifactId>jaxb-impl</artifactId>-->




        <!--<version>2.2.11</version>-->




        <!--</dependency>-->




        <!--<dependency>-->




        <!--<groupId>javax.activation</groupId>-->




        <!--<artifactId>activation</artifactId>-->




        <!--<version>1.1.1</version>-->




        <!--</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-autoconfigure</artifactId>




        </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>




 



    <build>




        <plugins>




            <plugin>




                <groupId>org.springframework.boot</groupId>




                <artifactId>spring-boot-maven-plugin</artifactId>




            </plugin>




        </plugins>




    </build>




 



</project>

（3）创建并配置yml文件

server:



  port: 8000




 



eureka:



  instance:



    hostname: localhost  # 指定Eureka主机




  client:



    register-with-eureka: false   # 指定当前主机是否向Eureka服务器进行注册




    fetch-registry: false    # 指定当前主机是否要从Eurka服务器下载服务注册列表




    service-url:   # 服务暴露地址




     defaultZone: http://localhost:8000/eureka




#     defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka



 



#  server:



#    enable-self-preservation: false    # 关闭自我保护

（4）定义spring boot启动类

二、创建提供者工程02-provider-8081

（1）创建工程

复制01-provider-8081，并重命名为02-provider-8081

https://blog.csdn.net/u012965203/article/details/99065322

（2）pom.xml依赖如下

<?xml version="1.0" encoding="UTF-8"?>



<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"



         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">



    <modelVersion>4.0.0</modelVersion>




    <parent>




        <groupId>org.springframework.boot</groupId>




        <artifactId>spring-boot-starter-parent</artifactId>




        <version>2.1.7.RELEASE</version>




        <relativePath/> <!-- lookup parent from repository -->




    </parent>




    <groupId>com.abc</groupId>




    <artifactId>02-provider-8081</artifactId>




    <version>0.0.1-SNAPSHOT</version>




    <name>02-provider-8081</name>




    <description>Demo project for Spring Boot</description>




 



    <properties>




        <java.version>1.8</java.version>




        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>




    </properties>




 



    <dependencies>




 



        <dependency>




            <groupId>com.alibaba</groupId>




            <artifactId>druid</artifactId>




            <version>1.1.10</version>




        </dependency>




 



        <!--actuator依赖-->




        <dependency>




            <groupId>org.springframework.boot</groupId>




            <artifactId>spring-boot-starter-actuator</artifactId>




        </dependency>




 



        <dependency>




            <groupId>org.springframework.boot</groupId>




            <artifactId>spring-boot-starter-data-jpa</artifactId>




        </dependency>




        <!--eureka客户端依赖-->




        <dependency>




            <groupId>org.springframework.cloud</groupId>




            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>




        </dependency>




 



        <!--修改MySQL驱动版本-->




        <dependency>




            <groupId>mysql</groupId>




            <artifactId>mysql-connector-java</artifactId>




            <version>5.1.47</version>




            <scope>runtime</scope>




        </dependency>




 



        <dependency>




            <groupId>org.springframework.boot</groupId>




            <artifactId>spring-boot-starter-web</artifactId>




        </dependency>




 



        <dependency>




            <groupId>org.projectlombok</groupId>




            <artifactId>lombok</artifactId>




            <optional>true</optional>




        </dependency>




        <dependency>




            <groupId>org.springframework.boot</groupId>




            <artifactId>spring-boot-starter-test</artifactId>




            <scope>test</scope>




        </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>




 



    <build>




        <plugins>




            <plugin>




                <groupId>org.springframework.boot</groupId>




                <artifactId>spring-boot-maven-plugin</artifactId>




            </plugin>




        </plugins>




    </build>




 



</project>

（3）修改yml文件

server:



  port: 8081




 



spring:



  jpa:




    # 指定在Spring容器启动时是否自动建表，默认为false




    generate-ddl: true




    # 指定是否在控制台显示其执行的SQL语句，默认false




    show-sql: true




    # 指定应用重启时是否重新创建更新表




    hibernate:




      ddl-auto: none



 



  # 配置数据源




  datasource:




    type: com.alibaba.druid.pool.DruidDataSource



    driver-class-name: com.mysql.jdbc.Driver




    url: jdbc:mysql:///test?useUnicode=true&characterEncoding=utf8



    username: root



    password: root



 



  # 指定当前微服务对象暴露的名称




  application:




    name: abcmsc-provider-depart



 



 



logging:



  # 设置日志输出格式




  pattern:




    console: level-%level %msg%n



  level:




    root: info



    org.hibernate: info



    org.hibernate.type.descriptor.sql.BasicBinder: trace



    org.hibernate.type.descriptor.sql.BasicExtractor: trace



    com.abc.provider: debug



 



# 指定Eureka服务中心



eureka:



  client:




    service-url:




         defaultZone: http://localhost:8000/eureka




      #    defaultZone: http://localhost:8100/eureka,http://localhost:8200/eureka,http://localhost:8300/eureka




 



  # 指定当前客户端主机在注册中心的名称




#  instance:



#    instance-id: abcmsc-provider-8081



 



info:



  company.name: www.abc.com



  company.addr: China Beijing



  company.tel: 12345678




  app.name: abc-msc



  app.desc: mic-server-cloud



  author: abc

三、创建消费工程02-consumer-8080

消费者将使用提供者暴露的服务名称(spring.application.name)来消费服务

（1）创建工程

复制01-consumer-8080，并重命名为02-consumer-8080

https://blog.csdn.net/u012965203/article/details/99065322

（2）添加依赖管理及依赖

<?xml version="1.0" encoding="UTF-8"?>



<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"



         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">



    <modelVersion>4.0.0</modelVersion>




 



    <groupId>com.abc</groupId>




    <artifactId>02-consumer-8080</artifactId>




    <version>0.0.1-SNAPSHOT</version>




    <packaging>jar</packaging>




 



    <parent>




        <groupId>org.springframework.boot</groupId>




        <artifactId>spring-boot-starter-parent</artifactId>




        <version>2.1.3.RELEASE</version>




        <relativePath/> <!-- lookup parent from repository -->




    </parent>




 



    <properties>




        <java.version>1.8</java.version>




        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>




    </properties>




 



    <dependencies>




        <!--actuator依赖-->




        <dependency>




            <groupId>org.springframework.boot</groupId>




            <artifactId>spring-boot-starter-actuator</artifactId>




        </dependency>




        <!--eureka客户端依赖-->




        <dependency>




            <groupId>org.springframework.cloud</groupId>




            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>




            <version>2.1.2.RELEASE</version>




        </dependency>




 



        <dependency>




            <groupId>org.springframework.boot</groupId>




            <artifactId>spring-boot-starter-web</artifactId>




        </dependency>




 



        <dependency>




            <groupId>org.projectlombok</groupId>




            <artifactId>lombok</artifactId>




            <optional>true</optional>




        </dependency>




        <dependency>




            <groupId>org.springframework.cloud</groupId>




            <artifactId>spring-cloud-commons</artifactId>




            <version>2.1.2.RELEASE</version>




            <scope>compile</scope>




        </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>




 



 



    <build>




        <plugins>




            <plugin>




                <groupId>org.springframework.boot</groupId>




                <artifactId>spring-boot-maven-plugin</artifactId>




            </plugin>




        </plugins>




    </build>




 



 



</project>

（3）修改yml文件

spring:



  application:



    name: abcmsc-consumer-depart



 



eureka:



  client:



    service-url:



          defaultZone: http://localhost:8000/eureka




    #  defaultZone: http://localhost:8100/eureka,http://localhost:8200/eureka,http://localhost:8300/eureka

（4）修改处理器

（5）修改JavaConfig类

四、测试

（1）启动eureka

（2）启动提供者

（3）启动消费者

（4）查看eureka服务列表

（5）测试功能

五、EurekaServer集群集群

这里要搭建的EurekaServer集群中包含三个EurekaServer节点，其端口号分别为8100、8200与8300

设置域名

在C:\Windows\System32\drivers\etc的host文件中添加如下域名映射信息

127.0.0.1 eureka8100.com




127.0.0.1 eureka8200.com




127.0.0.1 eureka8300.com

一、创建00-eurekaserver-8100

（1）创建工程

复制00-eurekaserver-8000工程，并重命名为00-eurekaserver-8100

（2） 修改pom

（3）修改配置文件

server:



  port: 8100




 



eureka:



  instance:




    hostname: eureka8100.com    # 指定Eureka主机




  client:




    register-with-eureka: false   # 指定当前主机是否需要向注册中心注册（不用，因为当前主机是Server，不是Client）




    fetch-registry: false  # 指定当前主机是否需要获取注册信息（不用，因为当前主机是Server，不是Client）




    service-url:   # 暴露服务中心地址




      defaultZone: http://eureka8100.com:8100/eureka,http://eureka8200.com:8200/eureka,http://eureka8300.com:8300/eureka

（4）创建00-eurekaserver-8200

再以相同的方式再复制出00-eurekaserver-8200

（5）创建00-eurekaserver-8300

再以相同的方式再复制出00-eurekaserver-8300

（6）修改提供者配置文件

（7）修改消费者配置文件

（8）启动eureka8100.com

（9）启动eureka8200.com

（10）启动eureka8300.com

（11）启动消费者

（12）启动提供者

（13）查看提供服务列表