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這篇文章主要介紹“怎么通過(guò)docker和docker-compose實(shí)現(xiàn)eureka高可用”的相關(guān)知識(shí),小編通過(guò)實(shí)際案例向大家展示操作過(guò)程,操作方法簡(jiǎn)單快捷,實(shí)用性強(qiáng),希望這篇“怎么通過(guò)docker和docker-compose實(shí)現(xiàn)eureka高可用”文章能幫助大家解決問(wèn)題。
1. eureka server項(xiàng)目目錄結(jié)構(gòu):
2. eureka 配置文件配置:
server: port: 8900 spring: application: name: eureka-server profiles: active: dev management: security: enabled: false health: rabbit: enabled: false --- spring: profiles: dev eureka: client: serviceurl: defaultzone: http://localhost:${server.port}/eureka/ register-with-eureka: false fetch-registry: false instance: hostname: localhost prefer-ip-address: true --- spring: profiles: test_ha_1 eureka: client: serviceurl: defaultzone: http://eurekaserver2:${server.port}/eureka/ instance: hostname: eurekaserver1 # prefer-ip-address: true 該配置為true表示注冊(cè)到eureka上的是ip,如果這樣的化,eureka服務(wù)器就不能通過(guò)服務(wù)器發(fā)現(xiàn)replicas。 # 故如果想通過(guò)docker實(shí)現(xiàn)eureka高可用,該配置最好使用默認(rèn)值(false) # 此處配置為true且實(shí)現(xiàn)高可用也不是沒(méi)有辦法,就是每個(gè)eureka服務(wù)需映射到docker環(huán)境外,且知道ip。 --- spring: profiles: test_ha_2 eureka: 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 文件內(nèi)容:
from java:8 add eureka-server-1.0.0.jar eurekaserver.jar entrypoint ["java","-djava.security.egd=file:/dev/./urandom","-jar","/eurekaserver.jar"]
5. 生成 eureka server 鏡像:
通過(guò)執(zhí)行 mvn clean package docker:build 命令,生成eurekaserver鏡像,如下:
6. 通過(guò)docker-compose 編排:
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. 跳轉(zhuǎn)至項(xiàng)目目錄下,執(zhí)行docker-compose up 命令,自動(dòng)生成eureka server 兩個(gè)容器:
8. 由于已經(jīng)把eureka 端口映射出來(lái),所以本地通過(guò)端口訪問(wèn)eureka,查看eureka 服務(wù)狀態(tài):
通過(guò)上圖可知,在registered-replicas和available-replicas兩項(xiàng)均能看見(jiàn)另外一個(gè)eureka服務(wù),至此eureka 集群搭建完成。
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