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這篇文章給大家分享的是有關(guān)如何通過docker和docker-compose實(shí)現(xiàn)eureka高可用的內(nèi)容。小編覺得挺實(shí)用的,因此分享給大家做個(gè)參考,一起跟隨小編過來看看吧。
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表示注冊到eureka上的是IP,如果這樣的化,eureka服務(wù)器就不能通過服務(wù)器發(fā)現(xiàn)Replicas。 # 故如果想通過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:
通過執(zhí)行 mvn clean package docker:build 命令,生成eurekaserver鏡像,如下:
6. 通過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,所以本地通過端口訪問eureka,查看eureka 服務(wù)狀態(tài):
通過上圖可知,在registered-replicas和available-replicas兩項(xiàng)均能看見另外一個(gè)eureka服務(wù),至此eureka 集群搭建完成。
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