Eureka（eureka）服务集群搭建搭建

编写Eureka Server集群:

eureka-server总结

编写Eureka Server集群:

1.在POM文件中引入依赖：<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-starter-actuator</artifactId></dependency>2. 配置application.yml---spring:profiles: peer1server:port: 8761eureka:instance:hostname: peer1client:service-url:defaultZone: http://peer2:8762/eureka/  # 注意： peer1要连接peer2的eureka地址server:peer-node-read-timeout-ms: 2000---spring:profiles: peer2server:port: 8762eureka:instance:hostname: peer2client:service-url:defaultZone: http://peer1:8761/eureka/ # 注意： peer2要连接peer1的eureka地址server:peer-node-read-timeout-ms: 20003.  在EurekaServerApplication上增加@EnableEurekaServer开启 Eureka Server功能。4.  在C:\Windows\System32\drivers\etc\hosts增加如下设置：127.0.0.1 peer1127.0.0.1 peer25. 在eureka-server项目中运行，mvn clean package命令打包此项目。6. cmd进入eureka-server/target目录，运行 java -jar eureka-server-0.0.1-SNAPSHOT.jar --spring.profiles.active=peer1 命令，在命令行中看到：Started Eureka Server 意味着eureka-server启动成功。7. cmd进入eureka-server/target目录，运行 java -jar eureka-server-0.0.1-SNAPSHOT.jar --spring.profiles.active=peer2 命令，在命令行中看到：Started Eureka Server 意味着eureka-server启动成功。8. 浏览器访问http://peer1:8761/ 在DS Replicas 可以看到 peer2。9. 浏览器访问 http://peer2:8762/  在DS Replicas 可以看到 peer1。 代表Eureka server集群搭建成功。10. 启动eureka-client服务，http://peer1:8761/ 或 http://peer2:8762/主页上的Instances currently registered with Eureka 选项中都己经有一个实例被注册， Application 为EUREKA-CLIENT, Staus 为UPC 在线） ， 端口为8763 。

eureka-client总结

编写Eureka Client:

1.在POM文件中引入依赖：<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</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-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency>2. 配置application.ymlspring:application:name: eureka-clientserver:port: 8763eureka:client:service-url:defaultZone: http://localhost:8761/eureka/3. 在EurekaClientApplication上增加@EnableEurekaClient开启 Eureka Client的功能。在日志中看到： DiscoveryClient_EUREKA-CLIENT/localhost:eureka-client:8762 - registration status: 204 代表服务注册成功。4. 新建一个HiController。5. 先启动eureka-server集群。启动步骤见 eureka-server/总结.txt 的 步骤4-7。6. 启动eureka-client服务后，在浏览器上访问Eureka Server主界面： http://peer1:8761/在主页上的Instances currently registered with Eureka 选项中己经有一个实例被注册， Application 为EUREKA-CLIENT, Staus 为UPC 在线） ， 端口为8763 。7.在浏览器上访问http://localhost:8763/hi?name=forezp， 浏览器显示如下信息： hi forezp,i am from port:8763

总的pom文件

<?xml version="1.0" encoding="UTF-8"?>

4.0.0

org.springframework.boot
spring-boot-starter-parent
2.1.0.RELEASE

com.forezp
chapter5-5
0.0.1-SNAPSHOT
chapter5-5
pom
Demo project for Spring Boot

<modules><module>eureka-client</module><module>eureka-server</module>
</modules><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
</properties><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>

eureka-server的pom和配置application.yml

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>

4.0.0

com.forezp
chapter5-5
0.0.1-SNAPSHOT

com.forezp
eureka-server
0.0.1-SNAPSHOT
eureka-server

<description>Demo project for Spring Boot</description><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-starter-actuator</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins>
</build>

application.yml:
#定义了两个profile 文件，分别为peerl 和peer2 ，它们的hostname 分别为peerl
#和peer2 。在实际开发中，可能是具体的服务器F 地址，它们的端口分别为8761 和8762
#因为是在本地搭建Eureka Server 集群，所以需要修改本地的host文件，windows系统的电脑
#在C:\Windows\System32\drivers\etc\hosts 中修改
#127.0.0.1 peer1
#127.0.0.1 peer2

spring:
profiles: peer1
server:
port: 8761
eureka:
instance:
hostname: peer1
client:
service-url:
defaultZone: http://peer2:8762/eureka/ # 注意： peer1要连接peer2的eureka地址
server:
peer-node-read-timeout-ms: 2000

spring:
profiles: peer2
server:
port: 8762
eureka:
instance:
hostname: peer2
client:
service-url:
defaultZone: http://peer1:8761/eureka/ # 注意： peer2要连接peer1的eureka地址
server:
peer-node-read-timeout-ms: 2000

eureka-client的pom和配置application.yml

pom.xml:

<?xml version="1.0" encoding="UTF-8"?>

4.0.0

com.forezp
chapter5-5
0.0.1-SNAPSHOT

com.forezp
eureka-client
0.0.1-SNAPSHOT
eureka-client
Demo project for Spring Boot

<dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</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-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins>
</build>

application.yml:

spring:
application:
name: eureka-client

server:
port: 8763

eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/