单机模拟配置Eureka集群
首先先提醒单机部署的重要点
- 如果使用一个ip地址（适用于单网卡）每个eureka实例使用不同的域名映射到同一个IP
- 如果每个eureka实例使用不同的IP（多网卡），要确保这些IP要都表示本地
本文假设使用第一种情况
1. 设置本机host文件以便模拟映射域名
sudo /etc/hosts
添加如下行
127.0.0.1 registry01
127.0.0.1 registry02
可以输入
ping registry01
ping registry02
来验证是否解析到 127.0.0.1
2. 建立Eureka集群成员服务器registry01
idea向导如何建立eureka server就不详细写了
我直接扔配置
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 https://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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.linkanyway</groupId>
<artifactId>registry</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>registry</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-netflix-eureka-server</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-test</artifactId>
<version>2.4.2</version>
<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>
主程序
package com.linkanyway.registry;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
/**
* @author linkanyway
*/
@EnableEurekaServer
@SpringBootApplication
public class RegistryApplication {
public static void main(String[] args) {
SpringApplication.run (RegistryApplication.class, args);
}
}
application.yml
server:
port: 8080
spring:
application:
name: EurekaCluster # 所有集群内都采用一样Name
eureka:
instance:
hostname: registry01
prefer-ip-address: true # 采用ip地址
ip-address: 127.0.0.1
client:
register-with-eureka: true # 控制当Spring Boot启动服务完成后是否将该服务注册到服务治理服务器上。这里因为服务本身就是服务治理服务器且有集群因此为true，如果未构建任何服务治理集群，需将其设置为false，表示不注册
fetch-registry: true # eureka.client.fetch-registry属性设置表示应用启动后是否需要从服务治理服务器中同步已注册的服务注册列表数据到本地 本处集群服务器成员则需要注册此处为true
service-url:
defaultZone: http://registry02:8081/eureka # 集群需要配置相互复制
server:
wait-time-in-ms-when-sync-empty: 5
3. 建立Eureka集群服务器成员registry02
pom文件
<?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 https://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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.linkanyway</groupId>
<artifactId>registry02</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>registry02</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</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>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
主程序
package com.linkanyway.registry02;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class Registry02Application {
public static void main(String[] args) {
SpringApplication.run (Registry02Application.class, args);
}
}
application.yml
server:
port: 8081
spring:
application:
name: EurekaCluster # 所有集群内都一样name
eureka:
instance:
hostname: registry02
prefer-ip-address: true # 采用ip地址
ip-address: 127.0.0.1
client:
register-with-eureka: true # 控制当Spring Boot启动服务完成后是否将该服务注册到服务治理服务器上。这里因为服务本身就是服务治理服务器且有集群因此为true，如果未构建任何服务治理集群，需将其设置为false，表示不注册
fetch-registry: true # eureka.client.fetch-registry属性设置表示应用启动后是否需要从服务治理服务器中同步已注册的服务注册列表数据到本地 本处集群服务器成员则需要注册此处为true
service-url:
defaultZone: http://registry01:8080/eureka # 集群需要配置相互复制
server:
wait-time-in-ms-when-sync-empty: 5
3 分别启动registry01,registry02
因为eureka同步需要时间，稍后会就可以看到下图的效果
4 模拟建立一个服务和消费服务
service01 服务
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 https://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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.linkanyway</groupId>
<artifactId>service01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>service01</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</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>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
主程序
package com.linkanyway.service01;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* @author linkanyway
*/
@EnableDiscoveryClient
@SpringBootApplication
public class Service01Application {
public static void main(String[] args) {
SpringApplication.run (Service01Application.class, args);
}
}
application.yml
server:
port: 8082
eureka:
client:
fetch-registry: true
register-with-eureka: true
serviceUrl:
defaultZone: http://127.0.0.1:8080/eureka/
instance:
prefer-ip-address: true #强烈推荐在项目中使用IP地址而不是主机名称来注册微服务。
lease-expiration-duration-in-seconds: 90
lease-renewal-interval-in-seconds: 30
ip-address: 127.0.0.1 # 因此，强烈推荐在项目中使用IP地址而不是主机名称来注册微服务。
spring:
application:
name: service01
编写服务（此处简略的只是做一个控制器）
package com.linkanyway.service01.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author linkanyway
* @version 1.0
* @name ServiceController
* @description TODO
* @date 2021/02/01 20:21
*/
@RestController
@RequestMapping("service")
public class ServiceController {
@GetMapping("get")
public String get() {
return "Service01";
}
}
service02 消费服务
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 https://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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.linkanyway</groupId>
<artifactId>service02</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>service02</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</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>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
application.yml配置文件
server:
port: 8083
eureka:
client:
fetch-registry: true
register-with-eureka: true
serviceUrl:
defaultZone: http://127.0.0.1:8081/eureka/
instance:
prefer-ip-address: true
ip-address: 127.0.0.1
spring:
application:
name: service02
feign:
client:
default-config:
connectTimeout: 10000
readTimeout: 10000
主程序
package com.linkanyway.service02;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
/**
* @author linkanyway
*/
@EnableDiscoveryClient
@EnableFeignClients
@SpringBootApplication
public class Service02Application {
public static void main(String[] args) {
SpringApplication.run (Service02Application.class, args);
}
}
服务调用的feign定义
package com.linkanyway.service02.feign;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* @author linkanyway
* @version 1.0
* @name Service01
* @description TODO
* @date 2021/02/01 20:31
*/
@FeignClient("service01")
public interface Service01 {
/**
* get
* @return
*/
@RequestMapping("service/get")
String get();
}
控制器代码
package com.linkanyway.service02.controller;
import com.linkanyway.service02.feign.Service01;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author linkanyway
* @version 1.0
* @name ServiceController
* @description TODO
* @date 2021/02/01 20:34
*/
@RestController
@RequestMapping("service")
public class ServiceController {
final
Service01 service01;
public ServiceController(Service01 service01) {
this.service01 = service01;
}
@RequestMapping("get")
public String get()
{
return service01.get ();
}
}
启动service01,02
可以看到成功注册到注册中心
单机模拟配置Eureka集群的更多相关文章
- F版本SpringCloud 5—Eureka集群和自我保护机制
源码地址:https://gitee.com/bingqilinpeishenme/Java-Tutorials 前言 上篇文章中,通过代码搭建了Eureka注册中心和客户端,是Eureka的简单应用 ...
- Eureka单机高可用伪集群配置
Eureka Server高可用集群理论上来讲,因为服务消费者本地缓存了服务提供者的地址,即使Eureka Server宕机,也不会影响服务之间的调用,但是一旦新服务上线,已经缓存在本地的服务提供者不 ...
- eureka集群高可用配置
譬如eureka.client.register-with-eureka和fetch-registry是否要配置,配不配区别在哪里:eureka的客户端添加service-url时,是不是需要把所有的 ...
- eureka集群高可用配置，亲测成功配置（转）
转自大神的文章:https://blog.csdn.net/tianyaleixiaowu/article/details/78184793 网上讲这个东西的很多,抄来抄去的,大部分类似,多数没讲明白 ...
- 三（2）、springcloud之Eureka集群配置
1)原理说明** 服务启动后向Eureka注册,Eureka Server会将注册信息向其他Eureka Server进行同步,当服务消费者要调用服务提供者,则向服务注册中心获取服务提供者地址,然后会 ...
- Spring Cloud Eureka集群配置及注意事项(Greenwich版本)
Spring Cloud Eureka集群配置及注意事项(Greenwich版本) 一·概述 Spring Cloud Netflix Eureka 是一个提供服务注册与发现的套件.服务提供者只需要将 ...
- eureka集群基于DNS配置方式
https://www.cnblogs.com/relinson/p/eureka_ha_use_dns.html 最近在研究spring cloud eureka集群配置的时候碰到问题:多台eu ...
- eureka集群的两种配置方式:配置文件方式与DNS方式
eureka client获取serviceUrls(eureka server地址)列表的过程: 1. 根据use-dns-for-fetching-service-urls属性判断是从dns还是从 ...
- Eureka集群
Eureka集群搭建 高可用集群配置 当注册中心扛不住高并发的时候,这时候 要用集群来扛: 普通操作 我们再新建两个module microservice-eureka-server-2002 m ...
随机推荐
- 本地项目上传至GitHub
本地项目上传至GitHub 使用git上传 一.安装git 直接官网下载,安装即可. git官网下载 github下载 按照好后大概就是这个样子 二.创建公钥和私钥 有的就可跳过此步骤 我们双击打开g ...
- TurtleBot3 Waffle （tx2版华夫）（13）RC100遥控杆控制
13.1．遥控器说明 使用ROBOTIS RC100的设置已经在ROS的OpenCR固件中,因此不需要安装必需软件包, 安装号即可使用. 13.2．遥控器的安装 1接线口穿过后壳的过孔. 2接线口连接 ...
- Dockerfile文件说明
文件说明 此文件用于docker镜像文件的制作 基本结构 Dockerfile文件由行命令组成,以#开头注释行 一般分为四部分,基础镜像信息.维护者信息.镜像操作指令和容器启动执行指令. 例如 #De ...
- 使用ImmutableMap简化语句
项目实战 最近接了一个出行权益的需求,回调的状态有十几种,需要转换为进行中,取消,已完成几种状态进行订单状态的展示,使用ImmutableMap可以简化语句,替代使用if-else 语句或者switc ...
- Tomcat7,Tomcat8 的manager 配置
1.打开文件:tomcat目录-->conf-->tomcat-users.xml 2.将以下代码替换原来的所有内容,不要犹豫,就是所有内容. <?xml version=&quo ...
- 【Nginx】配置nginx图片服务器
想通过nginx来访问服务器上的图片 可以搭建一个nginx图片服务器. 做法如下: 先安装nginx,这里直接用yum来进行安装的 安装方法如下: https://blog.csdn.net/iml ...
- 【ORA】ORA-39002，ORA-39070，ORA-29283， ORA-06512，ORA-29283解决办法
今天使用IMPDP导入的时候报了一个错误 ORA-39002: invalid operation ORA-39070: Unable to open the log file. ORA-2928 ...
- 【ORA】ORA-00030: User session ID does not exist.
今天巡检,查询锁相关的情况的时候,确认业务后,准备将锁干掉,但是干掉的时候报了一个错误,ORA-00030 发现回话不存在,我以为pmon进程已经将锁进程kill掉了,就再次查看,发现,还是存在 这个 ...
- AQS之ReentrantReadWriteLock精讲分析上篇
1.用法 1.1 定义一个安全的list集合 public class LockDemo { ArrayList<Integer> arrayList = new ArrayList< ...
- 面试时通过volatile关键字，全面展示线程内存模型的能力
面试时,面试官经常会通过volatile关键字来考核候选人在多线程方面的能力,一旦被问题此类问题,大家可以通过如下的步骤全面这方面的能力. 1 首先通过内存模型说明volatile关键字的作用 ...