eureka server 单节点与多节点部署演示

环境搭建

目录结构（ad-eureka为子模块）

　　--ad-spring-cloud

　　　--ad-eureka

　　　　　--pom.xml

主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>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0.1.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <modules>

        <module>ad-eureka</module>

    </modules>

    <groupId>com.me</groupId>

    <artifactId>ad-spring-cloud</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>pom</packaging>

    <name>ad-spring-cloud</name>

    <description> project for Ad Spring-Cloud</description>

    <properties>

        <java.version>1.8</java.version>

        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.projectlombok</groupId>

            <artifactId>lombok</artifactId>

            <version>1.16.20</version>

        </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>

    <repositories>

        <repository>

            <id>spring-milestones</id>

            <name>Spring Milestones</name>

            <url>https://repo.spring.io/milestone</url>

        </repository>

    </repositories>

</project>

ad-eureka下的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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent>

        <groupId>com.me</groupId>

        <artifactId>ad-spring-cloud</artifactId>

        <version>0.0.1-SNAPSHOT</version>

    </parent>

    <artifactId>ad-eureka</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>ad-eureka</name>

    <description>project for ad-eureka</description>

    <dependencies>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

单节点配置

ad-eureka的yml配置

# 单节点eureka配置

spring:

  application:

    name: ad-eureka-server

server:

  port: 8000

eureka:

  instance:

    hostname: localhost

  client:

    fetch-registry: false

    register-with-eureka: false

    service-url:

      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka

单节点效果

多节点配置

　　说明：由于我们在一台机器一个工程上模拟多个节点，我们需要给springboot应用配置profiles属性用来标识，并且打包成jar

　　包之后，我们启动指定profiles的应用

修改hosts文件（单机单应用上模拟多节点所需要）

　　　　127.0.0.1 server1
　　　　127.0.0.1 server2
　　　　127.0.0.1 server3

ad-eureka的yml配置

---

spring:

  application:

    name: ad-eureka

  profiles: server1

server:

  port: 8000

eureka:

  instance:

    hostname: server1

    prefer-ip-address: false

  client:

    service-url:

    #将该eureka注册到server2和server3

      defaultZone: http://server2:8001/eureka,http://server3:8002/eureka

---

spring:

  application:

    name: ad-eureka

  profiles: server2

server:

  port: 8001

eureka:

  instance:

    hostname: server2

    prefer-ip-address: false

  client:

    service-url:

    #将该eureka注册到server1和server3

      defaultZone: http://server1:8000/eureka,http://server3:8002/eureka

---

spring:

  application:

    name: ad-eureka

  profiles: server3

server:

  port: 8002

eureka:

  instance:

    hostname: server3

    prefer-ip-address: false

  client:

    service-url:

    #将该eureka注册到server1和server2

      defaultZone: http://server1:8000/eureka,http://server2:8001/eureka

打包并启动

E:\IdeaProjects\ad-spring-cloud> mvn clean package -D maven.skip.test=true -U

分别启动指定的profiles的应用

E:\IdeaProjects\ad-spring-cloud\ad-eureka\target> java -jar .\ad-eureka-0.0.1-SNAPSHOT.jar --spring.profiles.active=server1

E:\IdeaProjects\ad-spring-cloud\ad-eureka\target> java -jar .\ad-eureka-0.0.1-SNAPSHOT.jar --spring.profiles.active=server2

E:\IdeaProjects\ad-spring-cloud\ad-eureka\target> java -jar .\ad-eureka-0.0.1-SNAPSHOT.jar --spring.profiles.active=server3

多节点效果

写在最后

　　至此，在本机上演示完成了单节点和多节点的eureka的部署，当然在实际应用中，多节点的部署是部署到多个服务器上的，这样其实更为简单，我们就省去了修改hosts文件的步骤，只需要将每个eureka应用工程的defaultZone改为其余节点的ip地址加端口号即可。