docker - 使用 docker-compose 时应用程序未注册到 eureka

Question

我举了这个例子https://github.com/paulc4/microservices-demo我用它创建了 3 个 docker 镜像，其中包含以下 Dockerfile:

springdocker-注册:

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD target/microservice-demo-1.1.0.RELEASE.jar app.jar
EXPOSE 1111
ENTRYPOINT exec java -jar /app.jar registration

springdocker-帐户:

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD target/microservice-demo-1.1.0.RELEASE.jar app.jar
EXPOSE 2222
ENTRYPOINT exec java -jar /app.jar accounts

springdocker-web:

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD target/microservice-demo-1.1.0.RELEASE.jar app.jar
EXPOSE 3333
ENTRYPOINT exec java -jar /app.jar web

如果我分别运行三个图像，一切正常，web 和 accounts 服务注册到 registration 服务(这是一个实现) Eureka 注册表)，我可以使用我的应用程序。但是，当将 docker-compose 与以下 docker-compose.yml 文件结合使用时

version: "3.4"
services:
 registration:
  image: springdocker-registration
  ports:
   - "1111:1111"

 accounts:
  image: springdocker-accounts
  ports:
   - "2222:2222"
  links:
   - registration
  depends_on:
   - registration

 web:
  image: springdocker-web
  ports:
   - "3333:3333"
  depends_on:
   - registration
   - accounts
  links:
   - registration

服务web和帐户无法注册到注册服务。以下是应用程序的配置文件:

注册服务器.yml:

eureka:
  instance:
    hostname: localhost
  client:  
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
     defaultZone: http://localhost:1111/eureka/

server:
  port: 1111   

spring:
  thymeleaf:
    enabled: false 

账户服务器.yml:

spring:
  application:
     name: accounts-service  
  freemarker:
    enabled: false           
  thymeleaf:
    cache: false            
    prefix: classpath:/accounts-server/templates/    

error:
  path: /error

server:
  port: 2222   

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:1111/eureka
  instance:
    leaseRenewalIntervalInSeconds: 5   
    preferIpAddress: true

网络服务器.yml

spring:
  application:
    name: web-service 
  freemarker:
    enabled: false     
  thymeleaf:
    cache: false       
    prefix: classpath:/web-server/templates/   

error:
  path: /error

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:1111/eureka
  instance:
    leaseRenewalIntervalInSeconds: 5 
    preferIpAddress: true

server:
  port: 3333  

我可以发布 docker-compose up 的完整控制台日志，但我认为这是有趣的一点:

1: ERROR RedirectingEurekaHttpClient - Request execution error
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused (Connection refused)

1: ERROR DiscoveryClient - DiscoveryClient_WEB-SERVICE/e3b5e6b3396c:web-service:3333 - was unable to refresh its cache! status = Cannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server

Answer 1

对于那些使用 docker-compose 的人，如果您的 services yml 文件中有以下内容:

eureka:
  client:
    serviceUrl:
      # Will get overridden in docker-compose
      defaultZone: http://localhost:1111/eureka

您可以在运行 docker-compose up 时在 docker-compose 文件中覆盖此设置，如下所示

version: "3.3"
services:

 # Other services registered above

 web:
  image: springdocker-web
  environment: 
   # Important for clients to register with eureka
   - eureka.client.serviceUrl.defaultZone=http://registration:8761/eureka/
  ports:
   - "3333:3333"
  depends_on:
   - registration
   - accounts
  links:
   - registration

在 Docker 版本 19.03.8 上测试