spring-cloud配置高可用eureka服务端

spring-cloud配置eureka服务端

eureka用来发现其他程序

依赖

<?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>2.0.5.RELEASE</version>

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

    </parent>

    <groupId>test</groupId>

    <artifactId>test</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <name>demo</name>

    <description>Demo project for Spring Boot</description>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

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

    </properties>

    <dependencies>

        <dependency>

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

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

            <scope>runtime</scope>

        </dependency>

        <dependency>

            <groupId>javax.xml.bind</groupId>

            <artifactId>jaxb-api</artifactId>

        </dependency>

        <dependency>

            <groupId>com.sun.xml.bind</groupId>

            <artifactId>jaxb-impl</artifactId>

            <version>2.3.0</version>

        </dependency>

        <dependency>

            <groupId>org.glassfish.jaxb</groupId>

            <artifactId>jaxb-runtime</artifactId>

            <version>2.3.0</version>

        </dependency>

        <dependency>

            <groupId>javax.activation</groupId>

            <artifactId>activation</artifactId>

            <version>1.1.1</version>

        </dependency>

    </dependencies>

    <dependencyManagement>

        <dependencies>

            <dependency>

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

                <artifactId>spring-cloud-dependencies</artifactId>

                <version>Finchley.SR1</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>

java

package test1.test;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableAutoConfiguration

@EnableEurekaServer

@SpringBootApplication

public class DemoApplication {

	public static void main(String[] args) {

		SpringApplication.run(DemoApplication.class, args);

	}

}

配置

---

# 单机版运行配置

spring:

  profiles: default

server:

  port: 9000

eureka:

  instance:

    hostname: eureka # 这个hostname要在本地hosts文件中添加好

  client:

    registerWithEureka: false

    fetchRegistry: false

    serviceUrl:

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

# 模拟的多个程序的配置

# 3个配置的运行命令如下

# java -jar -Dspring.profiles.active=c1 test-0.0.1-SNAPSHOT.jar

# java -jar -Dspring.profiles.active=c2 test-0.0.1-SNAPSHOT.jar

# java -jar -Dspring.profiles.active=c3 test-0.0.1-SNAPSHOT.jar

---

spring:

  profiles: c1

  application:

    name: eureka-server-clustered

server:

  port: 9001

eureka:

  instance:

    hostname: eureka1

  client:

    registerWithEureka: true

    fetchRegistry: true

    serviceUrl:

      defaultZone: http://eureka2:9002/eureka/,http:/eureka3:9003/eureka/

---

spring:

  profiles: c2

  application:

    name: eureka-server-clustered

server:

  port: 9002

eureka:

  instance:

    hostname: eureka2

  client:

    registerWithEureka: true

    fetchRegistry: true

    serviceUrl:

      defaultZone: http://eureka1:9001/eureka/,http://eureka3:9003/eureka/

---

spring:

  profiles: c3

  application:

    name: eureka-server-clustered

server:

  port: 9003

eureka:

  instance:

    hostname: eureka3

  client:

    registerWithEureka: true

    fetchRegistry: true

    serviceUrl:

      defaultZone: http://eureka1:9001/eureka/,http://eureka2:9002/eureka/

运行

运行 mvn install 将项目打包成jar

分别执行

java -jar -Dspring.profiles.active=c1 test-0.0.1-SNAPSHOT.jar

java -jar -Dspring.profiles.active=c2 test-0.0.1-SNAPSHOT.jar

java -jar -Dspring.profiles.active=c3 test-0.0.1-SNAPSHOT.jar

然后访问，即可看到其他两个程序

    http://eureka1:9001/

    http://eureka2:9002/

    http://eureka3:9003/