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详解通过docker和docker-compose实现eureka高可用

2024-09-01 13:55:37
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最近新项目有使用到springcloud 和docker,关于这两个技术就不分别介绍了,现在分享一下通过docker,docker-compose实现eureka高可用的方案。

1. eureka server项目目录结构:

docker,docker-compose,eureka,高可用

2. eureka 配置文件配置:

server: port: 8900spring: application:  name: eureka-server profiles:  active: devmanagement: security:  enabled: false health:  rabbit:   enabled: false---spring: profiles: deveureka: client:  serviceUrl:   defaultZone: http://localhost:${server.port}/eureka/  register-with-eureka: false  fetch-registry: false instance:  hostname: localhost  prefer-ip-address: true---spring: profiles: test_ha_1eureka: client:  serviceUrl:   defaultZone: http://eurekaserver2:${server.port}/eureka/ instance:  hostname: eurekaserver1#  prefer-ip-address: true 该配置为true表示注册到eureka上的是IP,如果这样的化,eureka服务器就不能通过服务器发现Replicas。#               故如果想通过Docker实现eureka高可用,该配置最好使用默认值(false)#               此处配置为true且实现高可用也不是没有办法,就是每个eureka服务需映射到Docker环境外,且知道ip。---spring: profiles: test_ha_2eureka: client:  serviceUrl:   defaultZone: http://eurekaserver1:${server.port}/eureka/ instance:  hostname: eurekaserver2#  prefer-ip-address: true

3. docker maven插件配置:

 <build>    <plugins>      <plugin>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-maven-plugin</artifactId>      </plugin>      <plugin>        <groupId>com.spotify</groupId>        <artifactId>docker-maven-plugin</artifactId>        <version>0.4.13</version>        <configuration>          <imageName>${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>          <dockerDirectory>src/main/docker</dockerDirectory>          <forceTags>true</forceTags>          <resources>            <resource>              <targetPath>/</targetPath>              <directory>${project.build.directory}</directory>            </resource>          </resources>        </configuration>        <!--<groupId>com.spotify</groupId>        <artifactId>docker-maven-plugin</artifactId>        <version>0.4.13</version>        <configuration>          <imageName>itmuch/${project.artifactId}:${project.version}</imageName>          <forceTags>true</forceTags>          <baseImage>java</baseImage>          <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>          <resources>            <resource>              <targetPath>/</targetPath>              <directory>${project.build.directory}</directory>              <include>${project.build.finalName}.jar</include>            </resource>          </resources>        </configuration>-->      </plugin>    </plugins>  </build>

4. Docker file 文件内容:

FROM java:8ADD eureka-server-1.0.0.jar eurekaserver.jarENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/eurekaserver.jar"]

5. 生成 eureka server 镜像:

通过执行 mvn clean package docker:build 命令,生成eurekaserver镜像,如下:

docker,docker-compose,eureka,高可用

6. 通过docker-compose 编排:

version: '2'services: eurekaserver1:  image: raynspace/eureka-server:1.0.0  ports:   - "7900:8900"  environment:   - spring.profiles.active=test_ha_1 eurekaserver2:  image: raynspace/eureka-server:1.0.0  #hostname: eurekaserver2  ports:   - "7800:8900"  environment:   - spring.profiles.active=test_ha_2

7. 跳转至项目目录下,执行docker-compose up 命令,自动生成eureka server 两个容器:

docker,docker-compose,eureka,高可用

8. 由于已经把eureka 端口映射出来,所以本地通过端口访问eureka,查看eureka 服务状态:

docker,docker-compose,eureka,高可用

通过上图可知,在registered-replicas和available-replicas两项均能看见另外一个eureka服务,至此eureka 集群搭建完成。

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持VEVB武林网。


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