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詳解通過(guò)docker和docker-compose實(shí)現(xiàn)eureka高可用

更新時(shí)間：2018年09月19日 11:44:06 作者：ganen_qian

這篇文章主要介紹了詳解通過(guò)docker和docker-compose實(shí)現(xiàn)eureka高可用，小編覺(jué)得挺不錯(cuò)的，現(xiàn)在分享給大家，也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

最近新項(xiàng)目有使用到springcloud 和docker，關(guān)于這兩個(gè)技術(shù)就不分別介紹了，現(xiàn)在分享一下通過(guò)docker,docker-compose實(shí)現(xiàn)eureka高可用的方案。

1. eureka server項(xiàng)目目錄結(jié)構(gòu)：

docker高可用

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：

docker高可用

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：

docker高可用