Spring Cloud Eureka 注冊與發(fā)現(xiàn)操作步驟詳解
在搭建Spring Cloud Eureka環(huán)境前先要了解整個架構(gòu)的組成,常用的基礎(chǔ)模式如下圖:
服務(wù)提供者:將springboot服務(wù)編寫好以后,通過配置注冊中心地址方式注冊,提供給消費(fèi)者使用。
注冊中心:服務(wù)的中間橋梁,服務(wù)提供者將服務(wù)注冊。服務(wù)消費(fèi)者可以通過注冊信息調(diào)用需要使用的服務(wù)。
服務(wù)消費(fèi)者:通過規(guī)定的調(diào)用方式,讀取注冊中心的注冊信息,調(diào)用相應(yīng)的服務(wù)。
根據(jù)后續(xù)的服務(wù)復(fù)雜度進(jìn)化以后,可以看到服務(wù)提供者也可以是服務(wù)消費(fèi)者,服務(wù)消費(fèi)者也可以是服務(wù)提供者。根據(jù)不同的業(yè)務(wù)情況是可以互相調(diào)用的。
下面來搭建一個基礎(chǔ)的eureka。環(huán)境還是使用的之前的spring官方下載的。
內(nèi)容寫的比較詳細(xì),可以跟這一步步操作。
一、注冊中心
以下是幾個需要修改和添加的地方,后面會有完整的pom.xml
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.3.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR2</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <!-- 最新版的 eureka 服務(wù)端包 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <!-- 監(jiān)控管理 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>
Spring Cloud | Spring Boot |
---|---|
Angel版本 | 兼容Spring Boot 1.2.x |
Brixton版本 | 兼容Spring Boot 1.3.x,也兼容Spring Boot 1.4.x |
Camden版本 | 兼容Spring Boot 1.4.x,也兼容Spring Boot 1.5.x |
Dalston版本、Edgware版本 | 兼容Spring Boot 1.5.x,不兼容Spring Boot 2.0.x |
Finchley版本 | 兼容Spring Boot 2.0.x,不兼容Spring Boot 1.5.x |
Greenwich版本 | 兼容Spring Boot 2.1.x |
這里采用Finchley.SR2版本 springboot版本改成 2.1.3.RELEASE
完整的pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.3.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>eureka1</artifactId> <version>0.0.1-SNAPSHOT</version> <name>eureka1</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR2</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!-- 最新版的 eureka 服務(wù)端包 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <!-- 監(jiān)控管理 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @EnableEurekaServer @SpringBootApplication public class Eureka1Application { public static void main(String[] args) { SpringApplication.run(Eureka1Application.class, args); } }
然后在代碼文件中添加@EnableEurekaServer注解
修改application.yml文件
server: port: 3000 # 端口 eureka: instance: hostname: eureka-center appname: 注冊中心 client: registerWithEureka: false # 單點(diǎn)的時候設(shè)置為 false 禁止注冊自身 fetchRegistry: false serviceUrl: defaultZone: http://localhost:3000/eureka server: enableSelfPreservation: false evictionIntervalTimerInMs: 4000
啟動服務(wù)
瀏覽器輸入 http://127.0.0.1:3000
證明注冊中心搭建成功了
二、服務(wù)提供者
前面的步驟一樣
ProviderController是新建的一個服務(wù)代碼
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- eureka 客戶端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency>
不同的地方有加了一個spring-boot-starter-web和spring-cloud-starter-netflix-eureka-client客戶端
完整的pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.3.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>eurekaClient1</artifactId> <version>0.0.1-SNAPSHOT</version> <name>eurekaClient1</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR2</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- eureka 客戶端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
EurekaClient1Application
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @EnableEurekaClient @SpringBootApplication public class EurekaClient1Application { public static void main(String[] args) { SpringApplication.run(EurekaClient1Application.class, args); } }
ProviderController
package com.example.demo; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class ProviderController { @RequestMapping(value = "/hello") public String hello(){ return "hello spring cloud!"; } @RequestMapping(value = "/nice") public String nice(){ return "nice to meet you!"; } }
application.yml
server: port: 3001 eureka: instance: preferIpAddress: true client: serviceUrl: defaultZone: http://localhost:3000/eureka ## 注冊到 eureka spring: application: name: single-provider ## 應(yīng)用程序名稱,后面會在消費(fèi)者中用到
證明服務(wù)已經(jīng)注冊成功
三、服務(wù)消費(fèi)者
前面還是同上
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <!-- eureka 客戶端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency>
pom.xml新增以上內(nèi)容
完整pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.3.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>eurekaClient1</artifactId> <version>0.0.1-SNAPSHOT</version> <name>eurekaClient1</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Finchley.SR2</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <!-- eureka 客戶端 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
EurekaClient2Application
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.openfeign.EnableFeignClients; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @EnableEurekaClient @EnableFeignClients @SpringBootApplication public class EurekaClient2Application { /** * 注入 RestTemplate * 并用 @LoadBalanced 注解,用負(fù)載均衡策略請求服務(wù)提供者 * 這是 Spring Ribbon 的提供的能力 * @return */ @LoadBalanced @Bean public RestTemplate restTemplate() { return new RestTemplate(); //用于調(diào)用服務(wù)對象 } public static void main(String[] args) { SpringApplication.run(EurekaClient2Application.class, args); } }
ConsumerController
package com.example.demo; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController public class ConsumerController { @Autowired private RestTemplate restTemplate; private static final String applicationName = "single-provider";//服務(wù)注冊名 @RequestMapping(value = "commonRequest") public Object commonRequest(){ String url = "http://"+ applicationName +"/hello"; String s = restTemplate.getForObject(url,String.class);//Ribbon方式調(diào)用服務(wù) return s; } }
application.yml
server: port: 3002 eureka: client: serviceUrl: defaultZone: http://127.0.0.1:3000/eureka ## 注冊到 eureka instance: preferIpAddress: true spring: application: name: single-customer
啟動服務(wù)
http://127.0.0.1:3002/commonRequest
返回服務(wù)提供者的 hello方法參數(shù)。
整個最簡單的過程就完成了,需要更好的使用spring cloud 后續(xù)需要了解分布式、負(fù)載均衡、熔斷等概念。在后續(xù)章節(jié)將一步步的拆分。
到此這篇關(guān)于Spring Cloud Eureka 注冊與發(fā)現(xiàn)操作步驟詳解的文章就介紹到這了,更多相關(guān)Spring Cloud Eureka 注冊內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家!
- Spring-cloud-eureka使用feign調(diào)用服務(wù)接口
- SpringCloud如何使用Eureka實現(xiàn)服務(wù)之間的傳遞數(shù)據(jù)
- SpringCloud服務(wù)注冊和發(fā)現(xiàn)組件Eureka
- SpringCloud實現(xiàn)Eureka服務(wù)注冊與發(fā)現(xiàn)
- springboot cloud使用eureka整合分布式事務(wù)組件Seata 的方法
- SpringCloud搭建netflix-eureka微服務(wù)集群的過程詳解
- 5分鐘搭建SpringCloud Eureka服務(wù)注冊中心的實現(xiàn)
- Spring Cloud 系列之注冊中心 Eureka詳解
- springcloud微服務(wù)之Eureka配置詳解
- Springcloud eureka搭建高可用集群過程圖解
- 如何用Eureka + Feign搭建分布式微服務(wù)
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