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：
2. eureka 配置文件配置：
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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:${server.port}/eureka/ instance: hostname: eurekaserver2# prefer-ip-address: true |
3. docker maven插件配置：
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<build> <plugins> <plugin> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-maven-plugin</artifactid> </plugin> <plugin> <groupid>com.spotify</groupid> <artifactid>docker-maven-plugin</artifactid> <version>0.4.13</version> <configuration> <imagename>${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：
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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：
6. 通过docker-compose 编排：
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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：
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：
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服务器之家。
原文链接：https://blog.csdn.net/nihaoma71121/article/details/77161545
