Wednesday, December 25, 2019

Spring Cloud 微服務入門 (二) Eureka 服務註冊與發現


下面兩個分別是個別的 service 個別專案不是在同一個專案底下
今天要完成的就是昨天說的這一塊

新增依賴

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

配置文件properties 改成 yml 格式

example
application.properties：
server.port=8081
 
spring.datasource.type=org.apache.tomcat.jdbc.pool.DataSource
spring.datasource.url=jdbc:mysql://aliyuncs.com:3306/database?useUnicode=true&zeroDateTimeBehavior=convertToNull&autoReconnect=true
spring.datasource.username=root
spring.datasource.password=******
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
application.yml :
server:
  port: 8082
  
spring:
    datasource:
        name: test
        url: jdbc:mysql://127.0.0.1:3306/database
        username: root
        password: ******
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
這邊我們預設的

設置 Eureka 配置文件

application.yml
這一串就是防止自己註冊自己
  registerWithEureka: false 
  fetchRegistry: false  
spring:
  cache:
    type : jcache
    jcache:
      config:
        classpath:ehcache.xml
server:
  port: 8761

eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

Eureka Server Main

package org.inlighting.security;

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

@SpringBootApplication
@EnableCaching
@EnableEurekaServer
public class WebApplication {

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

Eureka Server 啟用

Service Provider

負責把我們的 Service 註冊到 Eureka 讓他能被消費端找到

設置 Eureka 配置文件

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

spring:
  application:
    name: eureka-provider

server:
  port: 8081

Service Provider Main

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableEurekaClient
@RestController
public class EurekaServiceProviderApplication {

 @RequestMapping("/")
 public String home() {
       return "Hello world";
 }
 public static void main(String[] args) {
  SpringApplication.run(EurekaServiceProviderApplication.class, args);
 }

}
http://localhost:8761/

http://localhost:8081/
於
標籤： , ,