springcloud-eureka集群

其他 2018-09-05 03:58:28 阅读次数: 0

1、更改系统配置：

C:\Windows\System32\drivers\etc\ 打开 hosts文件，加入 127.0.0.1 eureka-colony1 eureka-colony2

2、创建eureka服务中心集群 eureka-colony

pom.xml

<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.boce</groupId>
   <artifactId>eureka-colony</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>jar</packaging>

   <name>eureka-colony</name>
   <description>Demo project for Spring Boot</description>

   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.9.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
   </parent>

   <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <java.version>1.8</java.version>
   </properties>

   <!-- 非继承方式引入maven依赖 -->
   <dependencyManagement>
      <dependencies>
         <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Dalston.SR5</version>
            <type>pom</type>
            <scope>import</scope>
         </dependency>
      </dependencies>
   </dependencyManagement>

   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-config</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-eureka</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-eureka-server</artifactId>
      </dependency>
   </dependencies>

   <build>
      <plugins>
         <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

</project>

.application.yml

server:
  port: 8761
spring:
  profiles: eureka-colony1
eureka:
  instance:
    hostname: eureka-colony1
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://eureka-colony2:8762/eureka/
  server:
    # 关闭自我保护
    enable-self-preservation: false
    # 清理服务器
    eviction-interval-timer-in-ms: 5000

---

server:
  port: 8762
spring:
  profiles: eureka-colony2
eureka:
  instance:
    hostname: eureka-colony2
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://eureka-colony1:8761/eureka/
  server:
    # 关闭自我保护
    enable-self-preservation: false
    # 清理服务器
    eviction-interval-timer-in-ms: 5000

EurekaColonyApplication.java 项目启动文件

@SpringBootApplication
@EnableEurekaServer
public class EurekaColonyApplication {

   public static void main(String[] args) {
      Scanner scanner = new Scanner(System.in);
      String profiles = scanner.nextLine();
      new SpringApplicationBuilder(EurekaColonyApplication.class).profiles(profiles).run(args);
   }

}

启动两次项目，服务名分别为eureka-colony1和eureka-colony2，查看服务中心，两个eureka服务中心已经被相互管理

3、创建eureka服务提供者，向服务中心注册

pom.xml

<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.boce</groupId>
   <artifactId>eureka-service</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>jar</packaging>

   <name>eureka-service</name>
   <description>Demo project for Spring Boot</description>

   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.9.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
   </parent>

   <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <java.version>1.8</java.version>
   </properties>

   <!-- 非继承方式引入maven依赖 -->
   <dependencyManagement>
      <dependencies>
         <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Dalston.SR5</version>
            <type>pom</type>
            <scope>import</scope>
         </dependency>
      </dependencies>
   </dependencyManagement>

   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-config</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-eureka</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-actuator</artifactId>
      </dependency>
   </dependencies>

   <build>
      <plugins>
         <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

</project>

application.yml

spring:
  application:
    name: eureka-service

# 可访问全部敏感端口
# /evn 服务的全部环境变量信息
# /health 当前服务状态
endpoints:
  sensitive: false

eureka:
  instance:
    #心跳设置，告诉服务器该实例仍在使用
    lease-renewal-interval-in-seconds: 5
    #告诉服务器如果10秒内未发送任何续约请求，则关闭该客户端
    lease-expiration-duration-in-seconds: 10
    metadata-map:
      company-name: in
  client:
    serviceUrl:
      defaultZone: http://127.0.0.1:8761/eureka/, http://127.0.0.1:8762/eureka/
    instance-info-replication-interval-seconds: 10

logging:
  level:
    com.netflix: DEBUG

User.java

public class User {

    private Integer id;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }

    private String username;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }

    private String password;
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    private String port;
    public String getPort() {
        return port;
    }
    public void setPort(String port) {
        this.port = port;
    }

}

MyRestController.java

@RestController
public class MyRestController {

    public static boolean isDB = true;

    @GetMapping(value = "/setIsDB/{isDB}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public void setIsDB(@PathVariable boolean isDB) {
        this.isDB = isDB;
    }

    @GetMapping(value = "/getUser/{id}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public User getUser(@PathVariable Integer id, HttpServletRequest request){
        User user = new User();
        user.setId(id);
        user.setUsername("中文");
        user.setPassword("123");
        user.setPort(request.getRequestURL().toString());
        return user;
    }
}

启动类EurekaServiceApplication.java

@SpringBootApplication
@EnableEurekaClient
public class EurekaServiceApplication {

   public static void main(String[] args) {
      Scanner scanner = new Scanner(System.in);
      String port = scanner.nextLine();
      new SpringApplicationBuilder(EurekaServiceApplication.class)
            .properties("server.port=" + port).run(args);
   }

}

3、创建eureka服务调用者eureka-invocation

pom.xml

<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.boce</groupId>
   <artifactId>eureka-invocation</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>jar</packaging>

   <name>eureka-invocation</name>
   <description>Demo project for Spring Boot</description>

   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.9.RELEASE</version>
      <relativePath/> <!-- lookup parent from repository -->
   </parent>

   <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <java.version>1.8</java.version>
   </properties>

   <!-- 非继承方式引入maven依赖 -->
   <dependencyManagement>
      <dependencies>
         <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Dalston.SR5</version>
            <type>pom</type>
            <scope>import</scope>
         </dependency>
      </dependencies>
   </dependencyManagement>

   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-config</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-eureka</artifactId>
      </dependency>
      <dependency><!-- 负载均衡 -->
         <groupId>org.springframework.cloud</groupId>
         <artifactId>spring-cloud-starter-ribbon</artifactId>
      </dependency>
   </dependencies>

   <build>
      <plugins>
         <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

</project>

application.yml

server:
  port: 8666

spring:
  application:
    name: eureka-invocation

eureka:
  instance:
    # 心跳设置，告诉服务器该实例仍在使用
    lease-renewal-interval-in-seconds: 5
    # 告诉服务器如果10秒内未发送任何续约请求，则关闭该客户端
    lease-expiration-duration-in-seconds: 10

  client:
    serviceUrl:
      defaultZone: http://127.0.0.1:8761/eureka/, http://127.0.0.1:8762/eureka/
    # 抓取服务列表
    registry-fetch-interval-seconds: 30

# 默认负载均衡器规则
#default:
#  ribbon:
#    NFLoadBalancerRuleClassName: com.boce.controller.MyRule

logging:
  level:
    com.netflix: DEBUG

BaseConfig.java

@Configuration
public class BaseConfig {
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }

}

MyRestController.java

@RestController
public class MyRestController {

    @Autowired
    private RestTemplate restTemplate;

    /**
     * 调用服务提供者的接口
     *
     * @param id
     * @return
     */
    @GetMapping(value = "/getUser/{id}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public String getUser(@PathVariable Integer id) {
        String templateUrl = "http://eureka-service/getUser/" + id;
        String result = restTemplate.getForObject(templateUrl, String.class);
        return result;
    }

}

启动类EurekaInvocationApplication.java

@SpringBootApplication
@EnableEurekaClient
public class EurekaInvocationApplication {

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

项目地址：https://github.com/keith002/springcloud-eureka

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