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父项目管理
首先，我们在创建投放系统之前，先看一下我们的工程结构：
mscx-ad-sponsor 就是我们的广告投放系统。如上结构，我们需要首先创建一个 Parent Project mscx-ad
来编写父项目的 pom，来管理我们的统一依赖信息。
<?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> 分布式广告系统 </name>
<description> 基于 Spring Cloud Alibaba 实现的分布式广告系统 </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 监控端点管理依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
<!-- 定义 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>
<!-- 定义远程 maven 仓库 -->
<repositories>
<!-- Spring 中央仓库 -->
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<!-- Ali 中央仓库 -->
<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>
<!-- 项目编译插件 -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>服务发现
Eureka
- Eureka Server (提供服务的注册和发现)
-
Eureka Client
- Service provider (服务提供方，将自身注册到 server 上，从而让 Eureka Server 保存 provider 的元数据，让其他的服务消费者可以找到当前服务)
- Service Consumer(服务消费方，从 Eureka Server 上获取注册的服务列表，从而消费服务)
创建 project mscx-ad-discovery, 然后使用 SpringBoot 项目的三部曲（加依赖，加注解，改配置）
编写 POM，重点关注依赖 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> 服务发现组件 </name>
<description> 先使用 eureka 实现，后续会使用 nacos 替换掉 </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> 添加注解 (@EnableEurekaServer)
@SpringBootApplication
@EnableEurekaServer
public class DiscoveryApplication {public static void main(String[] args) {SpringApplication.run(DiscoveryApplication.class, args);
}
}改配置
单点
spring:
application:
name: ad-discovery-server
server:
port: 8888
eureka:
instance:
hostname: localhost #单机版
client:
fetch-registry: false #是否从 eureka server 获取注册信息
register-with-eureka: false #注册自己到 eureka
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/集群
测试的时候，需要修改 hosts 文件
zhangpandeMacBook-Pro:etc zhangpan$ cat hosts
##
...
##
127.0.0.1 localhost
127.0.0.1 server1
127.0.0.1 server2
127.0.0.1 server3
::1 localhost 然后修改 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/启动集群测试：
- 配置启动 profile /
java -jar mscx-ad-discovery.jar --spring.profiles.active=server1
- 效果展示
做一个好人。
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