[Spring cloud 一步步實現廣告系統] 2. 配置專案結構 & 實現Eureka服務
阿新 • • 發佈：2019-08-05
父專案管理
首先，我們在建立投放系統之前，先看一下我們的工程結構：
mscx-ad-sponsor就是我們的廣告投放系統。如上結構，我們需要首先建立一個Parent Project mscx-ad
來編寫父專案的pom，來管理我們的統一依賴資訊。
<?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> <packaging>pom</packaging> <modules> <module>mscx-ad-discovery</module> <module>mscx-ad-zuul</module> <module>mscx-ad-gateway</module> <module>mscx-ad-discovery-nacos</module> <module>mscx-ad-common</module> <module>mscx-ad-db</module> <module>mscx-ad-sponsor</module> <module>mscx-ad-search</module> <module>mscx-ad-feign-sdk</module> </modules> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.sxzhongf</groupId> <artifactId>mscx-ad</artifactId> <version>1.0-SNAPSHOT</version> <name>分散式廣告系統</name> <description>基於Spring Cloud Alibaba 實現的分散式廣告系統</description> <properties> <java.version>1.8</java.version> <spring-cloud.version>Greenwich.SR2</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--Spring cloud 監控端點管理依賴--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> </dependencies> <!--定義Spring Cloud 主版本--> <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> <!--定義遠端maven倉庫--> <repositories> <!-- Spring 中央倉庫 --> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> <!-- Ali 中央倉庫 --> <repository> <id>alibaba-milestones</id> <name>ali Milestones</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> <!--專案編譯外掛--> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
服務發現
Eureka
-
Eureka Server (提供服務的註冊和發現)
-
Eureka Client
- Service provider (服務提供方，將自身註冊到server上，從而讓Eureka Server儲存provider的元資料，讓其他的服務消費者可以找到當前服務)
- Service Consumer(服務消費方，從Eureka Server上獲取註冊的服務列表，從而消費服務)
建立project mscx-ad-discovery, 然後使用SpringBoot專案的三部曲（加依賴，加註解，改配置）
編寫POM，重點關注依賴spring-cloud-starter-eureka-server
<?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>mscx-ad</artifactId> <groupId>com.sxzhongf</groupId> <version>1.0-SNAPSHOT</version> <relativePath>../pom.xml</relativePath> </parent> <modelVersion>4.0.0</modelVersion> <packaging>jar</packaging> <groupId>com.sxzhongf</groupId> <artifactId>mscx-ad-discovery</artifactId> <version>1.0-SNAPSHOT</version> <name>服務發現元件</name> <description>先使用eureka實現，後續會使用nacos替換掉</description> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <!--<artifactId>spring-cloud-netflix-eureka-server</artifactId>--> <artifactId>spring-cloud-starter-eureka-server</artifactId> <version>1.2.7.RELEASE</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
添加註解(@EnableEurekaServer)
@SpringBootApplication
@EnableEurekaServer
public class DiscoveryApplication {
public static void main(String[] args) {
SpringApplication.run(DiscoveryApplication.class, args);
}
}
改配置
單點
spring:
application:
name: ad-discovery-server
server:
port: 8888
eureka:
instance:
hostname: localhost #單機版
client:
fetch-registry: false #是否從eureka server獲取註冊資訊
register-with-eureka: false #註冊自己到eureka
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
叢集
測試的時候，需要修改hosts檔案
zhangpandeMacBook-Pro:etc zhangpan$ cat hosts
##
...
##
127.0.0.1 localhost
127.0.0.1 server1
127.0.0.1 server2
127.0.0.1 server3
::1 localhost
然後修改application.yml
spring:
application:
name: ad-discovery
profiles: server1
server:
port: 7777
eureka:
instance:
hostname: server1
prefer-ip-address: false
client:
service-url:
defaultZone: http://server2:8888/eureka/,http://server3:9999/eureka/
---
spring:
application:
name: ad-discovery
profiles: server2
server:
port: 8888
eureka:
instance:
hostname: server2
prefer-ip-address: false
client:
service-url:
defaultZone: http://server1:7777/eureka/,http://server3:9999/eureka/
---
spring:
application:
name: ad-discovery
profiles: server3
server:
port: 9999
eureka:
instance:
hostname: server3
prefer-ip-address: false
client:
service-url:
defaultZone: http://server2:8888/eureka/,http://server1:7777/eureka/
啟動叢集測試：
- 配置啟動profile /
java -jar mscx-ad-discovery.jar --spring.profiles.active=server1
- 效果展示
