Eureka入门

笔记

刚入门springcloud

看了【高清电子版】微服务架构基础SpringBoot+SpringCloud+Docker 被坑，做个笔记填坑

 

坑：使用spring-boot版本与spring-cloud依赖对不上

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
            <version>1.4.3.RELEASE</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
            <version>1.4.3.RELEASE</version>
        </dependency>

报错：

LoggingFailureAnalysisReporter - Application failed to start due to an exception 
SpringApplicationBuilder.<init>([Ljava/lang/Object;)

 

然后自己升级了版本

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
            <version>3.0.2</version>
        </dependency>
        
        <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/>
    </parent>

提示需要更改springboot的版本：
Change Spring Boot version to one of the following versions [2.4.x, 2.5.x]

修改SpringBoot版本为2.4.4,运行成功

 

学编程也不是第一次吃了版本的亏，上图

 

 

顺着做一个成功的笔记

 

1.创建父项目导依赖

<dependency>

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

    <artifactId>spring-boot-dependencies</artifactId>

    <version>2.2.2.RELEASE</version>

    <type>pom</type>

    <scope>import</scope>

</dependency>

<dependency>

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

    <artifactId>spring-cloud-dependencies</artifactId>

    <version>Hoxton.SR1</version>

    <type>pom</type>

    <scope>import</scope>

</dependency>

<dependency>

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

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

    <version>2.2.2.RELEASE</version>

</dependency>

 

2.创建子项目导入依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    <version>2.2.2.RELEASE</version>
</dependency>

 

 

3.服务端配置eureka的yml文件

server:
  port: 7777

spring:
  application:
    name: 7777_server

# 配置eureka
eureka:
  # 实例名
  instance:
    # 主机名
    hostname: localhost
    instance-id: Server_7777
  # 配置clientu
  client:
    enabled: true
    # 不需要要向自己注册
    register-with-eureka: false
    service-url:
      defaultZone:
        # http://localhost:7777/eureka/
        http://${eureka.instance.hostname}:${server.port}/eureka/

 

4.配置服务端主类

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

 

5.客户端配置yml文件

spring:
  application:
    name: Server_7002
server:
  port: 7002
eureka:
  instance:
    # UP (1) - DESKTOP-MP7F61F:Server_7002:7002
    prefer-ip-address: true # 使用ip地址注册
    # UP (1) - user-server
    instance-id: user-server # 指定服务的id
    hostname: localhost
  client:
    register-with-eureka: true
#    fetch-registry: true
    service-url:
      defaultZone: http://localhost:7777/eureka/
      # http://localhost:7777/eureka/

 

6.配置客户端主类

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

 

7.访问

访问Eureka页面:http://localhost:7777/

 

成功！