spring boot 2.4.3 下的spring cloud 2020.0.1 之 注册中心Eureka

version

• spring-boot-starter-parent 2.4.3
• spring-cloud-dependencies 2020.0.1

spring boot 和spring cloud 版本关系依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.4.3</version>
</parent>

<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>

注册中心Eureka 的依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    <exclusions>
        <exclusion>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <groupId>org.springframework.boot</groupId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--项目启动会给出黄色警告,建议使用caffeine-->
<dependency>
    <groupId>com.github.ben-manes.caffeine</groupId>
    <artifactId>caffeine</artifactId>
    <version>${caffeine.version}</version>
</dependency>

打包的build

<build>
  <plugins>
      <!--spring boot 项目打包-->
      <plugin>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
  </plugins>
</build>

启动类 和旧的无差别

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;


@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

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

配置文件

spring boot 2.4.x 版本的配置文件的加载机制发生了变化,此处不进行详述.自行百度.

• 配置文件需要是 application.properties 或者是 application.yml文件
  • 注意: 是application. bootstrap.[properties | yml] 文件无法加载
    • 可能需要引入XXXXX依赖
• application.yml

spring:
  application:
    name: eureka-server
  profiles:
    active: dev
  config:
    import: # 目前使用 spring.profiles.include 进行配置文件包含,也是可以的,建议使用 import,毕竟是新的嘛.
      - classpath:application-actuator.yml
      - classpath:application-eureka.yml

• application-actuator.yml

management:
  endpoint:
    shutdown:
      enabled: true
  endpoints:
    web:
      exposure:
        include: "*"

• application-eureka.yml

eureka:
  instance:
    prefer-ip-address: true  # 将自己的ip注册到eureka server
    lease-renewal-interval-in-seconds: 5
    lease-expiration-duration-in-seconds: 20
    instance-id: ${spring.cloud.client.ip-address}:${server.port}
  client:
    register-with-eureka: true # 将自己注册到注册中心
    fetch-registry: true # 从注册中心获取注册表信息
  server:
    enable-self-preservation: true # 禁用自我保护模式
    eviction-interval-timer-in-ms: 5000
---
spring:
  config:
    activate:
      on-profile: dev # 旧的spring.profiles 指定环境的方式已被忽略
server:
  port: 9091
eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://127.0.0.1:9091/eureka/
---
spring:
  config:
    activate:
      on-profile: peer1
eureka:
  client:
    service-url:
      defaultZone: http://eureka.cn:9092/eureka/
server:
  port: 9091
---
spring:
  config:
    activate:
      on-profile: peer2
server:
  port: 9092
eureka:
  client:
    service-url:
      defaultZone: http://eureka.cn:9091/eureka/
...

启动命令

nohub 等后台运行自行填充

# 上述配置 默认激活的dev环境.访问[http://127.0.0.1:9091](http://127.0.0.1:9091)
java -jar youProjectJarName.jar --spring.profile.active=dev
# 启用注册中心的高可用启动命令
java -jar youProjectJarName.jar --spring.profile.active=peer1
java -jar youProjectJarName.jar --spring.profile.active=peer2

展示一下 有图有真相

如有问题请发送 代码 问题描述 至17610759700@163.com