Spring Cloud學習(一) 服務的註冊與發現(Eureka)
阿新 • • 發佈：2018-07-18
demo ice with gap 註冊中心 rop esc ann model
1 創建服務註冊中心
在這裏，我需要用的組件是Spring Cloud Netflix的Eureka ,eureka是一個服務註冊和發現模塊。
1.1 創建model工程作為服務註冊中心Eureka-server
項目結構
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 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.seawaterbt.cloud</groupId> <artifactId>eureka-server</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-server</name> <description>Demo project forSpring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Edgware.SR4</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
1.2 啟動服務註冊中心Eureka-server
springboot啟動類
package com.seawaterbt.cloud.eurekaserver; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }
application.yml
server: port: 8761 context-path: /eureka-server eureka: instance: hostname: localhost client: registerWithEureka: false fetchRegistry: false serviceUrl: defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka-server/
通過eureka.client.registerWithEureka：false和fetchRegistry：false來表明自己是一個eureka server.
啟動工程,打開瀏覽器訪問： http://localhost:8761/eureka-server/ ,界面如下：
No application available 沒有服務被發現 ……^_^ 因為沒有註冊服務當然不可能有服務被發現了。
2 創建服務提供者 Eureka-client
1.1 創建model工程作為服務提供者Eureka-client
項目結構
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.seawatebt.cloud</groupId> <artifactId>eureka-client</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-client</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Edgware.SR4</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
1.2 創建一個簡單的服務接口
目錄結構
InfoController.java
package com.seawatebt.cloud.eurekaclient.controller; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class InfoController { @Value("${server.port}") public String port; @GetMapping({"/hi","/hello"}) public String hi(@RequestParam(value = "name",defaultValue = "seawaterBt")String name){ return "name="+name+"-----port="+port; } }
1.3 啟動服務提供者Eureka-client
配置springboot啟動類
EurekaClientApplication
package com.seawatebt.cloud.eurekaclient; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; @SpringBootApplication @EnableEurekaClient public class EurekaClientApplication { public static void main(String[] args) { SpringApplication.run(EurekaClientApplication.class, args); } }
application.yml
server: port: 8762 context-path: /eureka-client #服務名稱 spring: application: name: server-hi eureka: client: serviceUrl: defaultZone: http://localhost:8761/eureka-server/eureka/
spring.application.name,這個很重要，這在以後的服務與服務之間相互調用一般都是根據這個name
啟動工程，打開http://localhost:8761/eureka-server/ ，即eureka server 的網址：
你會發現一個服務已經註冊在服務中了，服務名為SERVICE-HI ,端口為8762
訪問 http://pc-20180321caba:8762/eureka-client/hi 你會在瀏覽器上看到 :
3. 參考資料
https://blog.csdn.net/forezp/article/details/69696915
Spring Cloud學習(一) 服務的註冊與發現(Eureka)