springcloud 第1課 :Rest學習環境搭建—服務提供者
springcloud 第2課 :Rest學習環境搭建—服務消費者
springcloud 第3課 :Eureka是什麼
springcloud 第4課 :Eureka服務注冊、資訊配置、自我保護機制
springcloud 第5課 :Eureka叢集環境配置
Ribbon是什麼?
Ribbon是Netflix釋出的雲中間層服務開源項目,其主要功能是提供用戶端實作負載均衡算法。Ribbon用戶端元件提供一系列完善的配置項如連接配接逾時,重試等。簡單的說,Ribbon是一個用戶端負載均衡器,我們可以在配置檔案中Load Balancer後面的所有機器,Ribbon會自動的幫助你基于某種規則(如簡單輪詢,随機連接配接等)去連接配接這些機器,我們也很容易使用Ribbon實作自定義的負載均衡算法。
實作負載均衡方式1:通過伺服器端實作負載均衡(nginx)
實作負載均衡方式2:通過用戶端實作負載均衡(ribbon)
1、負載均衡和Ribbon案例
便于了解,消費者目錄結構圖如下
1.1、将ribbon和eureka配置到用戶端
導入ribbon和eureka的pom依賴
<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
<artifactId>demo1</artifactId>
<groupId>org.example</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>springcloud-consumer-dept-80</artifactId>
<dependencies>
<!--Ribbon,負責負載均衡-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<!--加入eureka依賴,負責注冊與發現-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
<version>1.4.6.RELEASE</version>
</dependency>
<!--實體類-->
<dependency>
<groupId>org.example</groupId>
<artifactId>springcloud-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!--web啟動器-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--熱部署-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
1.2、配置eureka,實作負載均衡
application.yaml 配置eureka,消費者可以随機的從3個eureka注冊中心消費服務
server:
port: 80
#eureka配置
eureka:
client:
register-with-eureka: false #消費者不向eureka中心注冊自己,隻消費不提供服務,生産者才負責提供服務
service-url: #消費者可以随機的到這3個eureka注冊中心消費,達到負載均衡的效果
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
1.3、配置類添加ribbon的負載均衡注解
package com.lian.springcloud.config;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ConfigureBean {
//配置負載均衡實作RestTemplate,ribbon的作用
@LoadBalanced //ribbon,基于用戶端實作負載均衡
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
1.4、controller層配置 String REST_URL_PREFIX
package com.lian.springcloud.controller;
import com.lian.springcloud.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
import java.util.List;
@RestController
public class DeptConsumerController {
/**
* 1、消費者,不應該有service層
* 2、RestTemplate 供我們直接調用即可,注冊到Spring容器中,由配置類注入spring容器
* ( url,實體:用map封裝,Class<T> responseType )
*/
@Autowired
RestTemplate restTemplate;
//未加Ribbon之前,用戶端通路的是固定的某個端口,這樣會導緻機器壓力較大,不能給多台機器合理配置設定任務量
//private static final String REST_URL_PREFIX = "http://localhost:8001";
/**
* 用戶端通路的是某一個服務裡面的多個随機的端口,根據IRule類,可根據權重等值來進行輪詢,達到負載均衡的作用
*/
private static final String REST_URL_PREFIX = "http://SPRINGCLOUD-PROVIDER-DEPT";
@RequestMapping("/consumer/dept/get/{id}")
public Dept get(@PathVariable("id") Long id){
return restTemplate.getForObject(REST_URL_PREFIX+"/dept/get/"+id, Dept.class);
}
@RequestMapping("/consumer/dept/list")
public List<Dept> list(){
return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list",List.class);
}
@RequestMapping("/consumer/dept/add")
public boolean add(Dept dept){
return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add",dept,Boolean.class);
}
}
1.5、主啟動啟動
package com.lian.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@EnableEurekaClient
@SpringBootApplication
public class DeptConsumer_80 {
public static void main(String[] args) {
SpringApplication.run(DeptConsumer_80.class,args);
}
}
2、使用Ribbon實作負載均衡
1、建立3個相同的資料庫,這裡我直接複制第一個資料庫示範
CREATE TABLE `dept1` (
`deptno` int(11) NOT NULL AUTO_INCREMENT,
`dname` varchar(255) DEFAULT NULL,
`dbsource` varchar(255) DEFAULT NULL,
PRIMARY KEY (`deptno`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
insert into dept (deptno,dname,dbsource) VALUES (1,'開發部','db01');
insert into dept (deptno,dname,dbsource) VALUES (1,'策劃部','db01');
insert into dept (deptno,dname,dbsource) VALUES (1,'美術部','db01');
insert into dept (deptno,dname,dbsource) VALUES (1,'招聘部','db01');
2、建立3個生産者
複制生産者8001,生成生産者8002和8003,修改資料庫名和端口名、執行個體id名、主啟動類即可
2.1、導入pom依賴
<?xml version="1.0" encoding="UTF-8"?>
<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">
<parent>
<artifactId>springcloud</artifactId>
<groupId>org.example</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>springcloud-provider-dept-8001</artifactId>
<dependencies>
<!--我們需要拿到實體類,是以需要配置 api 子產品-->
<dependency>
<groupId>org.example</groupId>
<artifactId>springcloud-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!--junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--druid-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
<!--logback日志門面-->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
</dependency>
<!--mybatis的springboot啟動器-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<!--springboot的測試-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--jetty,當做應用伺服器,和tomcat類似-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<!--熱部署工具-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<!--加入eureka依賴-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
<version>1.4.6.RELEASE</version>
</dependency>
<!-- actuator 完善監控資訊-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
</project>
2.2、複制resources
2.2.1、application.yaml
修改端口号、資料庫名、instance-id
server:
port: 8001
#mybatis的配置
mybatis:
config-location: classpath:mybatis/mybatis-config.xml #mybatis核心配置檔案
mapper-locations: classpath:mybatis/mapper/*.xml
type-aliases-package: com.lian.springcloud.pojo
#spring的配置
spring:
application:
name: springcloud-provider-dept #3個服務名稱一緻,但請求不同
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: org.gjt.mm.mysql.Driver
url: jdbc:mysql://localhost:3306/db?useUnicode=true&characterEncoding=utf-8
username: root
password: root
#eureka的配置,服務注冊到哪裡
eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
instance:
instance-id: springcloud-provider-dept8001 #修改eureka頁面的status描述
fetch-registry: false
#info配置
info:
app.name: lian-springcloud
company.name: msb
2.2.2、複制mybatis包
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!--開啟二級緩存-->
<setting name="cacheEnabled" value="true"/>
</settings>
</configuration>
DeptMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lian.springcloud.dao.DeptDao">
<insert id="addDept" parameterType="com.lian.springcloud.pojo.Dept">
insert into dept (dname,dbsource) values (#{dname},#{dbsource})
</insert>
<select id="queryById" parameterType="long" resultType="com.lian.springcloud.pojo.Dept">
select * from dept where deptno = #{deptno}
</select>
<select id="queryAll" resultType="com.lian.springcloud.pojo.Dept">
select * from Dept
</select>
</mapper>
2.3、複制java目錄下的包
2.3.1、dao層
package com.lian.springcloud.dao;
import com.lian.springcloud.pojo.Dept;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* @Repository 托管給spring容器
* @Mapper 作用有3個:
* 1、把mapper這個DAO交給Spring管理
* 2、不再寫mapper映射檔案
* 3、編譯之後會生成相應的接口實作類
*/
@Repository
@Mapper
public interface DeptDao {
boolean addDept(Dept dept);
Dept queryById(Long id);
List<Dept> queryAll();
}
2.3.2、DeptService接口
package com.lian.springcloud.service;
import com.lian.springcloud.pojo.Dept;
import java.util.List;
public interface DeptService {
boolean addDept(Dept dept);
Dept queryById(Long id);
List<Dept> queryAll();
}
2.3.3、DeptServiceImpl實作類
package com.lian.springcloud.service;
import com.lian.springcloud.dao.DeptDao;
import com.lian.springcloud.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class DeptServiceImpl implements DeptService{
@Autowired
private DeptDao deptDao;
@Override
public boolean addDept(Dept dept) {
return deptDao.addDept(dept);
}
@Override
public Dept queryById(Long id) {
return deptDao.queryById(id);
}
@Override
public List<Dept> queryAll() {
return deptDao.queryAll();
}
}
2.3.4、controller層
package com.lian.springcloud.controller;
import com.lian.springcloud.pojo.Dept;
import com.lian.springcloud.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import java.util.List;
//通過restful服務
@Controller
public class DeptController {
@Autowired
private DeptService deptService;
//擷取微服務資訊
@Autowired
private DiscoveryClient client;
@GetMapping("/dept/list")
@ResponseBody
public List<Dept> queryAllDepts(){
return deptService.queryAll();
}
@GetMapping("/dept/get/{id}")
@ResponseBody
public Dept queryById(@PathVariable("id") Long id){
return deptService.queryById(id);
}
@PostMapping("/dept/add")
@ResponseBody
public void addDept(Dept dept){
deptService.addDept(dept);
}
//注冊進來的微服務,擷取一些消息
@GetMapping("/dept/discovery")
public Object discover(){
//擷取微服務清單的清單
List<String> services = client.getServices();
System.out.println(services);
//得到一個具體的微服務資訊,通過具體的微服務id,applicationname
List<ServiceInstance> instances = client.getInstances("SPRINGCLOUD-PROVIDER-DEPT");
for (ServiceInstance instance : instances) {
System.out.println(
instance.getHost()+"\t"+
instance.getPort()+"\t"+
instance.getUri()+"\t"+
instance.getServiceId()+"\t"
);
}
return this.client;
}
}
2.3.5、主啟動類
類名修改為8002和8003
package com.lian.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
/**
* 主啟動類
* 因為是maven項目,不是spring initialize項目,需要自己寫主啟動類
*
*/
@EnableDiscoveryClient //服務發現
@EnableEurekaClient //eureka是cs架構,配置此注解,在服務啟動後,會自動注冊到eureka服務端
@SpringBootApplication
public class DeptProvider_8001 {
public static void main(String[] args) {
SpringApplication.run(DeptProvider_8001.class,args);
}
}
3個eureka注冊中心都有這3個生産者提供的服務
ribbon的預設算法就是輪詢
3、自定義負載均衡算法
負載均衡算法有以下幾種,預設是輪詢
3.1、IRule類
public interface IRule{
public Server choose(Object key);
public void setLoadBalancer(ILoadBalancer lb);
public ILoadBalancer getLoadBalancer();
}
3.2、示範負載均衡—随機算法操作
自定義的負載均衡算法元件會覆寫預設的元件
3.2.1、消費者80在config類,将myRule預設輪詢bean注入spring容器
package com.lian.springcloud.config;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
import com.netflix.ribbon.Ribbon;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ConfigureBean {
//配置負載均衡實作RestTemplate,ribbon的作用
/**
* IRule
* RoundRobinRule 輪詢,預設
* RandomRule 随機
* AvailabilityFilteringRule:會先過濾掉,跳閘,通路故障的服務,對剩下的進行輪詢
* RetryRule:會先按照輪詢擷取服務,如果服務擷取失敗,則會在指定的時間内進行,重試
*/
@LoadBalanced //ribbon,基于用戶端實作負載均衡
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
//負載均衡随機案例
@Bean
public IRule myRule(){
return new RandomRule();
}
}
或在消費者主啟動類上配置Ribbon的随機算法操作(推薦)
3.2.2、建立LianRule 類
package com.lian.springcloud.rule;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class LianRule {
@Bean
public IRule LianRule(){
return new RandomRule();
}
}
3.2.3、主啟動類配置@RibbonClient注解
package com.lian.springcloud;
import com.lian.springcloud.rule.MyRule;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.ribbon.RibbonClient;
@EnableEurekaClient
@SpringBootApplication
/**
* name是要負載均衡的服務名,服務名下有多個生産者提供的服務,采用MyRule負載均衡算法,此處的負載均衡算法是随機
* 在微服務啟動的時候就能加載我們自定義的Ribbon類,實作負載均衡算法
*/
@RibbonClient(name = "springcloud-provider-dept",configuration = LianRule.class)
public class DeptConsumer_80 {
public static void main(String[] args) {
SpringApplication.run(DeptConsumer_80.class,args);
}
}
3.3、示範自定義的負載均衡算法
消費者80目錄結構圖
3.3.1、建立LianRule類
IRule接口中查詢發現有了我們自定義的負載均衡算法方法
package com.lian.springcloud.rule;
import com.netflix.loadbalancer.IRule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class LianRule {
@Bean
public IRule myRule(){
return new LianRandomRule();
}
}
3.3.2、建立LianRandomRule類
package com.lian.springcloud.rule;
import com.netflix.client.config.IClientConfig;
import com.netflix.loadbalancer.AbstractLoadBalancerRule;
import com.netflix.loadbalancer.ILoadBalancer;
import com.netflix.loadbalancer.Server;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
public class LianRandomRule extends AbstractLoadBalancerRule {
/**
* 需求:
* 在生産者提供的3個服務中8001、8002、8003,每個服務,通路5次
* total = 0,預設=0,如果=5,我們指向下一個服務節點
* index=0,預設0,如果total=5,index+1
*/
//被調用的次數
private int total = 0;
//目前是誰在提供服務
private int currentIndex = 0;
public Server choose(ILoadBalancer lb, Object key) {
if (lb == null) {
return null;
}
Server server = null;
while (server == null) {
if (Thread.interrupted()) {
return null;
}
//擷取活着的服務
List<Server> upList = lb.getReachableServers();
//擷取全部的服務
List<Server> allList = lb.getAllServers();
int serverCount = allList.size();
if (serverCount == 0) {
return null;
}
//生成全部服務個數的區間随機數
//int index = chooseRandomInt(serverCount);
//從活着的服務中随機擷取一個
//server = upList.get(index);
//-----------------------自定義----------------------------
//如果目前的服務被調用次數小于5次
if (total < 5){
//就從活着的服務中繼續調用目前的服務
server = upList.get(currentIndex);
total++;
}else{
//新服務被調用的次數是0
total=0;
//切換成下一個服務
currentIndex++;
//因為隻有3個服務,下标為0、1、2,如果新服務的下标超過活着的服務數3,
if (currentIndex >= upList.size()){
//就再次切換到第0個服務
currentIndex=0;
}
//從活着的服務中擷取指定的服務進行操作
server = upList.get(currentIndex);
}
//---------------------------------------------------
if (server == null) {
Thread.yield();
continue;
}
if (server.isAlive()) {
return (server);
}
server = null;
Thread.yield();
}
return server;
}
protected int chooseRandomInt(int serverCount) {
return ThreadLocalRandom.current().nextInt(serverCount);
}
@Override
public Server choose(Object key) {
return choose(getLoadBalancer(), key);
}
@Override
public void initWithNiwsConfig(IClientConfig clientConfig) {
}
}
3.3.3、ConfigureBean 類不改變
package com.lian.springcloud.config;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ConfigureBean {
//配置負載均衡實作RestTemplate,ribbon的作用
/**
* IRule
* RoundRobinRule 輪詢
* RandomRule 随機
* AvailabilityFilteringRule:會先過濾掉,跳閘,通路故障的服務,對剩下的進行輪詢
* RetryRule:會先按照輪詢擷取服務,如果服務擷取失敗,則會在指定的時間内進行,重試
*/
@LoadBalanced //ribbon,基于用戶端實作負載均衡
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
// @Bean
// public IRule myRule(){
// return new RandomRule();
// }
}
3.3.4、DeptConsumerController 類不改變
package com.lian.springcloud.controller;
import com.lian.springcloud.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
import java.util.List;
@RestController
public class DeptConsumerController {
/**
* 1、消費者,不應該有service層
* 2、RestTemplate 供我們直接調用即可,注冊到Spring容器中,由配置類注入spring容器
* ( url,實體:用map封裝,Class<T> responseType )
*/
@Autowired
RestTemplate restTemplate;
//未加Ribbon之前,用戶端通路的是固定的某個端口,這樣會導緻機器壓力較大,不能給多台機器合理配置設定任務量
//private static final String REST_URL_PREFIX = "http://localhost:8001";
/**
* 用戶端通路的是某一個服務裡面的多個随機的端口,根據IRule類,可根據權重等值來進行輪詢,達到負載均衡的作用
*/
private static final String REST_URL_PREFIX = "http://SPRINGCLOUD-PROVIDER-DEPT";
@RequestMapping("/consumer/dept/get/{id}")
public Dept get(@PathVariable("id") Long id){
return restTemplate.getForObject(REST_URL_PREFIX+"/dept/get/"+id, Dept.class);
}
@RequestMapping("/consumer/dept/list")
public List<Dept> list(){
return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list",List.class);
}
@RequestMapping("/consumer/dept/add")
public boolean add(Dept dept){
return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add",dept,Boolean.class);
}
}
3.3.5、主啟動類 DeptConsumer_80
package com.lian.springcloud;
import com.lian.springcloud.rule.LianRule;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.ribbon.RibbonClient;
/**
* name是要負載均衡的服務名,服務名下有多個生産者提供的服務,采用MyRule負載均衡算法,此處的負載均衡算法是随機
* 在微服務啟動的時候就能加載我們自定義的Ribbon類,實作負載均衡算法
*/
@EnableEurekaClient
@SpringBootApplication
@RibbonClient(name = "SPRINGCLOUD-PROVIDER-DEPT",configuration = LianRule.class)
public class DeptConsumer_80 {
public static void main(String[] args) {
SpringApplication.run(DeptConsumer_80.class,args);
}
}
3.3.6、application.yaml 不改變
server:
port: 80
#Eureka配置
eureka:
client:
register-with-eureka: false #不向eureka注冊自己
service-url:
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
3.3.7、pom依賴不改變
<dependencies>
<!--實體類-->
<dependency>
<groupId>org.example</groupId>
<artifactId>springcloud-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!--web啟動器-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--熱部署-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<!--Ribbon-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<!--eureka-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
<version>1.4.6.RELEASE</version>
</dependency>
</dependencies>