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

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.  
  6.     <groupId>com.abc</groupId>
  7.     <artifactId>00-eurekaserver-8000</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>jar</packaging>
  10.  
  11.     <parent>
  12.         <groupId>org.springframework.boot</groupId>
  13.         <artifactId>spring-boot-starter-parent</artifactId>
  14.         <version>2.1.7.RELEASE</version>
  15.         <relativePath/> <!-- lookup parent from repository -->
  16.     </parent>
  17.  
  18.     <properties>
  19.         <java.version>1.8</java.version>
  20.         <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
  21.     </properties>
  22.  
  23.     <dependencies>
  24.         <!--JAXB，Java Architechture for Xml Binding，XML绑定的Java技术
  25.             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
  26.         -->
  27.         <!--<dependency>-->
  28.         <!--<groupId>javax.xml.bind</groupId>-->
  29.         <!--<artifactId>jaxb-api</artifactId>-->
  30.         <!--<version>2.2.11</version>-->
  31.         <!--</dependency>-->
  32.         <!--<dependency>-->
  33.         <!--<groupId>com.sun.xml.bind</groupId>-->
  34.         <!--<artifactId>jaxb-core</artifactId>-->
  35.         <!--<version>2.2.11</version>-->
  36.         <!--</dependency>-->
  37.         <!--<dependency>-->
  38.         <!--<groupId>com.sun.xml.bind</groupId>-->
  39.         <!--<artifactId>jaxb-impl</artifactId>-->
  40.         <!--<version>2.2.11</version>-->
  41.         <!--</dependency>-->
  42.         <!--<dependency>-->
  43.         <!--<groupId>javax.activation</groupId>-->
  44.         <!--<artifactId>activation</artifactId>-->
  45.         <!--<version>1.1.1</version>-->
  46.         <!--</dependency>-->
  47.  
  48.  
  49.         <dependency>
  50.             <groupId>org.springframework.cloud</groupId>
  51.             <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
  52.         </dependency>
  53.         <dependency>
  54.             <groupId>org.springframework.boot</groupId>
  55.             <artifactId>spring-boot-autoconfigure</artifactId>
  56.         </dependency>
  57.     </dependencies>
  58.  
  59.     <dependencyManagement>
  60.         <dependencies>
  61.             <dependency>
  62.                 <groupId>org.springframework.cloud</groupId>
  63.                 <artifactId>spring-cloud-dependencies</artifactId>
  64.                 <version>${spring-cloud.version}</version>
  65.                 <type>pom</type>
  66.                 <scope>import</scope>
  67.             </dependency>
  68.         </dependencies>
  69.     </dependencyManagement>
  70.  
  71.     <build>
  72.         <plugins>
  73.             <plugin>
  74.                 <groupId>org.springframework.boot</groupId>
  75.                 <artifactId>spring-boot-maven-plugin</artifactId>
  76.             </plugin>
  77.         </plugins>
  78.     </build>
  79.  
  80. </project>

（3）创建并配置yml文件

  1. server:
  2.   port: 8000
  3.  
  4. eureka:
  5.   instance:
  6.     hostname: localhost  # 指定Eureka主机
  7.   client:
  8.     register-with-eureka: false   # 指定当前主机是否向Eureka服务器进行注册
  9.     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
  10.     service-url:   # 服务暴露地址
  11.      defaultZone: http://localhost:8000/eureka
  12. #     defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka
  13.  
  14. #  server:
  15. #    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

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.     <parent>
  6.         <groupId>org.springframework.boot</groupId>
  7.         <artifactId>spring-boot-starter-parent</artifactId>
  8.         <version>2.1.7.RELEASE</version>
  9.         <relativePath/> <!-- lookup parent from repository -->
  10.     </parent>
  11.     <groupId>com.abc</groupId>
  12.     <artifactId>02-provider-8081</artifactId>
  13.     <version>0.0.1-SNAPSHOT</version>
  14.     <name>02-provider-8081</name>
  15.     <description>Demo project for Spring Boot</description>
  16.  
  17.     <properties>
  18.         <java.version>1.8</java.version>
  19.         <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
  20.     </properties>
  21.  
  22.     <dependencies>
  23.  
  24.         <dependency>
  25.             <groupId>com.alibaba</groupId>
  26.             <artifactId>druid</artifactId>
  27.             <version>1.1.10</version>
  28.         </dependency>
  29.  
  30.         <!--actuator依赖-->
  31.         <dependency>
  32.             <groupId>org.springframework.boot</groupId>
  33.             <artifactId>spring-boot-starter-actuator</artifactId>
  34.         </dependency>
  35.  
  36.         <dependency>
  37.             <groupId>org.springframework.boot</groupId>
  38.             <artifactId>spring-boot-starter-data-jpa</artifactId>
  39.         </dependency>
  40.         <!--eureka客户端依赖-->
  41.         <dependency>
  42.             <groupId>org.springframework.cloud</groupId>
  43.             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
  44.         </dependency>
  45.  
  46.         <!--修改MySQL驱动版本-->
  47.         <dependency>
  48.             <groupId>mysql</groupId>
  49.             <artifactId>mysql-connector-java</artifactId>
  50.             <version>5.1.47</version>
  51.             <scope>runtime</scope>
  52.         </dependency>
  53.  
  54.         <dependency>
  55.             <groupId>org.springframework.boot</groupId>
  56.             <artifactId>spring-boot-starter-web</artifactId>
  57.         </dependency>
  58.  
  59.         <dependency>
  60.             <groupId>org.projectlombok</groupId>
  61.             <artifactId>lombok</artifactId>
  62.             <optional>true</optional>
  63.         </dependency>
  64.         <dependency>
  65.             <groupId>org.springframework.boot</groupId>
  66.             <artifactId>spring-boot-starter-test</artifactId>
  67.             <scope>test</scope>
  68.         </dependency>
  69.     </dependencies>
  70.  
  71.     <dependencyManagement>
  72.         <dependencies>
  73.             <dependency>
  74.                 <groupId>org.springframework.cloud</groupId>
  75.                 <artifactId>spring-cloud-dependencies</artifactId>
  76.                 <version>${spring-cloud.version}</version>
  77.                 <type>pom</type>
  78.                 <scope>import</scope>
  79.             </dependency>
  80.         </dependencies>
  81.     </dependencyManagement>
  82.  
  83.     <build>
  84.         <plugins>
  85.             <plugin>
  86.                 <groupId>org.springframework.boot</groupId>
  87.                 <artifactId>spring-boot-maven-plugin</artifactId>
  88.             </plugin>
  89.         </plugins>
  90.     </build>
  91.  
  92. </project>

（3）修改yml文件

  1. server:
  2.   port: 8081
  3.  
  4. spring:
  5.   jpa:
  6.     # 指定在Spring容器启动时是否自动建表，默认为false
  7.     generate-ddl: true
  8.     # 指定是否在控制台显示其执行的SQL语句，默认false
  9.     show-sql: true
  10.     # 指定应用重启时是否重新创建更新表
  11.     hibernate:
  12.       ddl-auto: none
  13.  
  14.   # 配置数据源
  15.   datasource:
  16.     type: com.alibaba.druid.pool.DruidDataSource
  17.     driver-class-name: com.mysql.jdbc.Driver
  18.     url: jdbc:mysql:///test?useUnicode=true&amp;characterEncoding=utf8
  19.     username: root
  20.     password: root
  21.  
  22.   # 指定当前微服务对象暴露的名称
  23.   application:
  24.     name: abcmsc-provider-depart
  25.  
  26.  
  27. logging:
  28.   # 设置日志输出格式
  29.   pattern:
  30.     console: level-%level %msg%n
  31.   level:
  32.     root: info
  33.     org.hibernate: info
  34.     org.hibernate.type.descriptor.sql.BasicBinder: trace
  35.     org.hibernate.type.descriptor.sql.BasicExtractor: trace
  36.     com.abc.provider: debug
  37.  
  38. # 指定Eureka服务中心
  39. eureka:
  40.   client:
  41.     service-url:
  42.          defaultZone: http://localhost:8000/eureka
  43.       #    defaultZone: http://localhost:8100/eureka,http://localhost:8200/eureka,http://localhost:8300/eureka
  44.  
  45.   # 指定当前客户端主机在注册中心的名称
  46. #  instance:
  47. #    instance-id: abcmsc-provider-8081
  48.  
  49. info:
  50.   company.name: www.abc.com
  51.   company.addr: China Beijing
  52.   company.tel: 12345678
  53.   app.name: abc-msc
  54.   app.desc: mic-server-cloud
  55.   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

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.  
  6.     <groupId>com.abc</groupId>
  7.     <artifactId>02-consumer-8080</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>jar</packaging>
  10.  
  11.     <parent>
  12.         <groupId>org.springframework.boot</groupId>
  13.         <artifactId>spring-boot-starter-parent</artifactId>
  14.         <version>2.1.3.RELEASE</version>
  15.         <relativePath/> <!-- lookup parent from repository -->
  16.     </parent>
  17.  
  18.     <properties>
  19.         <java.version>1.8</java.version>
  20.         <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
  21.     </properties>
  22.  
  23.     <dependencies>
  24.         <!--actuator依赖-->
  25.         <dependency>
  26.             <groupId>org.springframework.boot</groupId>
  27.             <artifactId>spring-boot-starter-actuator</artifactId>
  28.         </dependency>
  29.         <!--eureka客户端依赖-->
  30.         <dependency>
  31.             <groupId>org.springframework.cloud</groupId>
  32.             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
  33.             <version>2.1.2.RELEASE</version>
  34.         </dependency>
  35.  
  36.         <dependency>
  37.             <groupId>org.springframework.boot</groupId>
  38.             <artifactId>spring-boot-starter-web</artifactId>
  39.         </dependency>
  40.  
  41.         <dependency>
  42.             <groupId>org.projectlombok</groupId>
  43.             <artifactId>lombok</artifactId>
  44.             <optional>true</optional>
  45.         </dependency>
  46.         <dependency>
  47.             <groupId>org.springframework.cloud</groupId>
  48.             <artifactId>spring-cloud-commons</artifactId>
  49.             <version>2.1.2.RELEASE</version>
  50.             <scope>compile</scope>
  51.         </dependency>
  52.  
  53.  
  54.     </dependencies>
  55.  
  56.     <dependencyManagement>
  57.         <dependencies>
  58.             <dependency>
  59.                 <groupId>org.springframework.cloud</groupId>
  60.                 <artifactId>spring-cloud-dependencies</artifactId>
  61.                 <version>${spring-cloud.version}</version>
  62.                 <type>pom</type>
  63.                 <scope>import</scope>
  64.             </dependency>
  65.         </dependencies>
  66.     </dependencyManagement>
  67.  
  68.  
  69.     <build>
  70.         <plugins>
  71.             <plugin>
  72.                 <groupId>org.springframework.boot</groupId>
  73.                 <artifactId>spring-boot-maven-plugin</artifactId>
  74.             </plugin>
  75.         </plugins>
  76.     </build>
  77.  
  78.  
  79. </project>

（3）修改yml文件

  1. spring:
  2.   application:
  3.     name: abcmsc-consumer-depart
  4.  
  5. eureka:
  6.   client:
  7.     service-url:
  8.           defaultZone: http://localhost:8000/eureka
  9.     #  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:WindowsSystem32driversetc的host文件中添加如下域名映射信息

  1. 127.0.0.1 eureka8100.com
  2. 127.0.0.1 eureka8200.com
  3. 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

  1. server:
  2.   port: 8100
  3.  
  4. eureka:
  5.   instance:
  6.     hostname: eureka8100.com    # 指定Eureka主机
  7.   client:
  8.     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）
  9.     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）
  10.     service-url:   # 暴露服务中心地址
  11.       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

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原文地址：https://www.cnblogs.com/edda/p/13263818.html