SpringCloud之Eureka实践

妖狐艹你老母 2022-04-16 03:23 269阅读 0赞

[附：SpringCloud之系列汇总跳转地址][SpringCloud]

### 实践 ###

一、新建一个父级maven项目SpringCloud，以后的各个项目都作为它的子项目，我们这里用的SpringBoot版本为1.5.13.RELEASE，SpringCloud版本为Dalston.SR5

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>
    
    	<groupId>com.yj</groupId>
    	<artifactId>SpringCloud</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>pom</packaging>
    
    	<name>SpringCloud</name>
    	<url>http://maven.apache.org</url>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.5.13.RELEASE</version>
    		<relativePath />
    	</parent>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    		</dependency>
    	</dependencies>
    
    	<modules>
    		<module>EurekaServer</module>
    		<module>EurekaClient</module>
    	</modules>
    
    	<dependencyManagement>
    		<dependencies>
    			<dependency>
    				<groupId>org.springframework.cloud</groupId>
    				<artifactId>spring-cloud-dependencies</artifactId>
    				<version>Dalston.SR5</version>  
    				<type>pom</type>
    				<scope>import</scope>
    			</dependency>
    		</dependencies>
    	</dependencyManagement>
    </project>

二、新建EurekaServer项目

①其项目结构

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI0MzEzNjM1_size_16_color_FFFFFF_t_70][]

②pom.xml

<?xml version="1.0"?>
    <project
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>com.yj</groupId>
    		<artifactId>SpringCloud</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    
    	<artifactId>EurekaServer</artifactId>
    	<name>EurekaServer</name>
    	<url>http://maven.apache.org</url>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-eureka-server</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-security</artifactId>
    		</dependency>
    	</dependencies>
    
    	<build>
    		<finalName>${artifactId}</finalName>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    				<configuration>
    					<skip>true</skip>
    				</configuration>
    			</plugin>
    			<plugin>
    				<groupId>org.apache.maven.plugins</groupId>
    				<artifactId>maven-jar-plugin</artifactId>
    				<configuration>
    
    					<archive>
    						<manifest>
    							<mainClass>com.yj.eureka.EurekaServerApplication</mainClass>
    							<addClasspath>true</addClasspath>
    							<classpathPrefix>lib</classpathPrefix>
    						</manifest>
    						<manifestEntries>
    							<Class-Path>./</Class-Path>
    						</manifestEntries>
    					</archive>
    					<excludes>
    						<exclude>config/**</exclude>
    						<exclude>**.xml</exclude>
    						<exclude>**.properties</exclude>
    					</excludes>
    				</configuration>
    			</plugin>
    			<plugin>
    				<artifactId>maven-assembly-plugin</artifactId>
    				<configuration>
    					<appendAssemblyId>false</appendAssemblyId>
    					<descriptors>
    						<descriptor>src/main/build/package.xml</descriptor>
    					</descriptors>
    				</configuration>
    				<executions>
    					<execution>
    						<id>make-assembly</id>
    						<phase>package</phase>
    						<goals>
    							<goal>single</goal>
    						</goals>
    					</execution>
    				</executions>
    			</plugin>
    		</plugins>
    		<testResources>
    			<testResource>
    				<directory>src/main/resources</directory>
    			</testResource>
    		</testResources>
    	</build>
    </project>

③EurekaServerApplication

package com.yj.eureka;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
    
    @SpringBootApplication
    @EnableEurekaServer
    public class EurekaServerApplication {
    	public static void main(String[] args) {
    		SpringApplication.run(EurekaServerApplication.class, args);
    	}
    }

④application.properties

spring.application.name=eureka-server
    eureka.instance.prefer-ip-address=true
    eureka.instance.instance-id=${spring.cloud.client.ipAddress}:${server.port}
    eureka.instance.hostname= ${spring.cloud.client.ipAddress}
    
    security.basic.enabled=true
    security.user.name=admin
    security.user.password=123456

⑤application-peer1.properties

server.port=8001
    eureka.instance.hostname=peer1
    eureka.client.serviceUrl.defaultZone=http://admin:123456@peer2:8002/eureka/

⑥application-peer2.properties

server.port=8002
    eureka.instance.hostname=peer2
    eureka.client.serviceUrl.defaultZone=http://admin:123456@peer1:8001/eureka/

⑦startAll.sh

#! /bin/bash
    
    moduleName="EurekaServer"
    
    java -jar ./$moduleName.jar --spring.profiles.active=peer1  &
    
    java -jar ./$moduleName.jar --spring.profiles.active=peer2  &

⑧package.xml（将配置文件从jar包中剥离出来）

<?xml version="1.0" encoding="UTF-8"?>
    <assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3
              http://maven.apache.org/xsd/assembly-1.1.3.xsd">
        <id>package</id>
        <formats>
            <format>zip</format>
        </formats>
        <includeBaseDirectory>true</includeBaseDirectory>
        <fileSets>
            <fileSet>
                <directory>bin</directory>
                <outputDirectory>/</outputDirectory>
            </fileSet>
            <fileSet>
                <directory>src/main/resources</directory>
                <outputDirectory>/</outputDirectory>
                <excludes>
                    <exclude>mapper/**</exclude>
                </excludes>
            </fileSet>
            <fileSet>
                <directory>${project.build.directory}</directory>
                <outputDirectory>/</outputDirectory>
                <includes>
                    <include>${artifactId}.jar</include>
                </includes>
            </fileSet>
        </fileSets>
        <dependencySets>
            <dependencySet>
                <outputDirectory>lib</outputDirectory>
                <scope>runtime</scope>
                <excludes>
                    <exclude>${groupId}:${artifactId}</exclude>
                </excludes>
            </dependencySet>
        </dependencySets>
    </assembly>

⑨我们在主机的/etc/hosts文件中加入

127.0.0.1 peer1
    127.0.0.1 peer2

部署启动，然后访问[http://192.168.37.138:8001/或者是http://192.168.37.138:8002/][http_192.168.37.138_8001_http_192.168.37.138_8002]，输入账号密码后可以看到eureka的界面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI0MzEzNjM1_size_16_color_FFFFFF_t_70 1][]

至此，eureka集群部署完毕

三、新建一个Eureka客户端项目，验证实例能否成功注册到eureka上面

①项目结构

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI0MzEzNjM1_size_16_color_FFFFFF_t_70 2][]

②EurekaClientApplication

package com.yj.eureka;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    
    @SpringBootApplication
    @EnableEurekaClient
    public class EurekaClientApplication {
    	public static void main(String[] args) {
    		SpringApplication.run(EurekaClientApplication.class, args);
    	}
    }

③application.properties

server.port=8003
    
    spring.application.name=eureka-client
    eureka.client.serviceUrl.defaultZone=http://admin:123456@192.168.37.138:8001/eureka,http://admin:123456@192.168.37.138:8002/eureka
    eureka.instance.prefer-ip-address=true
    eureka.instance.instance-id=${spring.cloud.client.ipAddress}:${server.port}
    eureka.instance.hostname=${spring.cloud.client.ipAddress}

④start.sh和stop.sh

#! /bin/bash
    
    moduleName="EurekaClient"
    
    pidPath="./$moduleName-tpid"
    
    rm -f $pidPath
    
    java -jar ./$moduleName.jar &
    
    echo $!>$pidPath

#! /bin/bash
    
    moduleName="EurekaClient"
    
    tpid=`cat ./$moduleName-tpid | awk '{print $1}'`
    
    tpid=`ps -aef | grep $tpid | grep -v grep | grep $moduleName |awk '{print $2}' `
    
    if [ ${tpid} ];then
    	kill -9 $tpid
    fi

⑤pom.xml

<?xml version="1.0"?>
    <project
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    	<modelVersion>4.0.0</modelVersion>
    
    	<parent>
    		<groupId>com.yj</groupId>
    		<artifactId>SpringCloud</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    
    	<artifactId>EurekaClient</artifactId>
    	<name>EurekaClient</name>
    	<url>http://maven.apache.org</url>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.cloud</groupId>
    			<artifactId>spring-cloud-starter-eureka</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    	</dependencies>
    
    	<build>
    		<finalName>${artifactId}</finalName>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    				<configuration>
    					<skip>true</skip>
    				</configuration>
    			</plugin>
    			<plugin>
    				<groupId>org.apache.maven.plugins</groupId>
    				<artifactId>maven-jar-plugin</artifactId>
    				<configuration>
    
    					<archive>
    						<manifest>
    							<mainClass>com.yj.eureka.EurekaClientApplication</mainClass>
    							<addClasspath>true</addClasspath>
    							<classpathPrefix>lib</classpathPrefix>
    						</manifest>
    						<manifestEntries>
    							<Class-Path>./</Class-Path>
    						</manifestEntries>
    					</archive>
    					<excludes>
    						<exclude>config/**</exclude>
    						<exclude>**.xml</exclude>
    						<exclude>**.properties</exclude>
    					</excludes>
    				</configuration>
    			</plugin>
    			<plugin>
    				<artifactId>maven-assembly-plugin</artifactId>
    				<configuration>
    					<appendAssemblyId>false</appendAssemblyId>
    					<descriptors>
    						<descriptor>src/main/build/package.xml</descriptor>
    					</descriptors>
    				</configuration>
    				<executions>
    					<execution>
    						<id>make-assembly</id>
    						<phase>package</phase>
    						<goals>
    							<goal>single</goal>
    						</goals>
    					</execution>
    				</executions>
    			</plugin>
    		</plugins>
    		<testResources>
    			<testResource>
    				<directory>src/main/resources</directory>
    			</testResource>
    		</testResources>
    	</build>
    </project>

⑥package.xml（将配置文件从jar包中剥离出来）

⑦EurekaClientController（为下一篇的Ribbon做准备）

package com.yj.eureka.controller;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class EurekaClientController {
    
    	@Value("${server.port}")
    	String port;
    
    	@RequestMapping("/hiEureka")
    	public String hiEureka(@RequestParam(value = "name", defaultValue = "yj") String name) {
    		return "hi " + name + " ,i am from port:" + port;
    	}
    }

⑧部署，分别启动8003,8004两个端口的EurekaClient实例，可以看到，EurekaClient项目成功注册到了Eureka集群上

![20181116161029214.png][]

[附：SpringCloud之系列汇总跳转地址][SpringCloud]

[SpringCloud]: https://blog.csdn.net/qq_24313635/article/details/104061217
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[http_192.168.37.138_8001_http_192.168.37.138_8002]: http://192.168.37.138:8001/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI0MzEzNjM1_size_16_color_FFFFFF_t_70 1]: /images/20220416/2f98a07afd3d4291ae5acf80aa821536.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI0MzEzNjM1_size_16_color_FFFFFF_t_70 2]: /images/20220416/0163ad37656046e78d224a12b7fbe4b3.png
[20181116161029214.png]: /images/20220416/5d117d3e412e498f8402d7a406898870.png