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/