EurekaServer com.netflix.discovery.shared.transport.TransportException：无法在 Docker 上的任何已知服务器上执行请求

Question

Eureka 服务器无法在 Docker 上运行

这是 Eureka 服务器和配置服务器的 docker-compose

version: '3'
services:
    fetebird-eurekaservice:
        container_name: FeteBird-EurekaService
        build:
            context: ../../Eureka-Service-Registry/
            dockerfile: Dockerfile
        image: fetebird/eurekaservice
        ports:
            - "8761:8761"
        networks:
            - spring-cloud-network
        volumes:
            - ./fetebird-eurekaservice/data:/data
        logging:
            driver: json-file
    
    fetebird-configserver:
        container_name: FeteBird-ConfigServer
        build:
            context: ../../FeteBird-ConfigServer
            dockerfile: Dockerfile
        image: fetebird/configserver
        ports:
            - "8085:8085"
        networks:
            - spring-cloud-network
        volumes:
            - ./fetebird-configserver/data:/data
        logging:
            driver: json-file        

networks:
    spring-cloud-network:
        driver: bridge

我也尝试过使用expose命令，但没有运气

尤里卡服务器docker文件

FROM openjdk:14

WORKDIR /fetebird-eurekaservice/service

ADD build/libs/fete-bird-eureka-service-registry-0.0.1-SNAPSHOT.jar fete-bird-eureka-service-registry-0.0.1-SNAPSHOT.jar

ENTRYPOINT ["java", "-jar", "fete-bird-eureka-service-registry-0.0.1-SNAPSHOT.jar"]

配置服务器客户端 Docker 文件

FROM openjdk:14

WORKDIR /fetebird-eurekaservice/service

ADD build/libs/fete-bird-configuration-server-0.0.1-SNAPSHOT.jar fete-bird-configuration-server-0.0.1-SNAPSHOT.jar

ENTRYPOINT ["java", "-jar", "fete-bird-configuration-server-0.0.1-SNAPSHOT.jar"]

配置服务器

@SpringBootApplication
@EnableEurekaServer
public class FeteBirdEurekaServiceRegistryApplication {
    public static void main(String[] args) {
        SpringApplication.run(FeteBirdEurekaServiceRegistryApplication.class, args);
    }
}

配置尤里卡服务器

应用程序.yml

server:
  port: 8761

eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
spring:
  profiles:
    active: dev

引导程序.yml

spring:
  application:
    name: CONFIG-SERVER
  profiles:
    active: native
  cloud:
    config:
      server:
        native:
          search-locations: classpath:/config

配置服务器

服务器：端口：8085

发现服务器访问

eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://localhost:8761/eureka/
  instance:
    hostname: localhost

错误

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
FeteBird-ConfigServer     |     at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:857) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:121) ~[eureka-client-1.9.21.jar!/:1.9.21]
FeteBird-ConfigServer     |     at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
FeteBird-ConfigServer     |     at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
FeteBird-ConfigServer     |     at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na]
FeteBird-ConfigServer     |     at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[na:na]
FeteBird-ConfigServer     |     at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[na:na]
FeteBird-ConfigServer     |     at java.base/java.lang.Thread.run(Thread.java:832) ~[na:na]
FeteBird-ConfigServer     | 
FeteBird-ConfigServer     | 2020-07-20 14:30:19.268  WARN 1 --- [nfoReplicator-0] c.n.discovery.InstanceInfoReplicator     : There was a problem with the instance info replicator

Answer 1

问题是这个

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:1111/eureka

它指向 localhost 并且 Eureka 不再在 localhost 上运行，在这种情况下 localhost 是单个容器。 容器链接在一起，因此您可以将其更改为

eureka:
  client:
    serviceUrl:
      defaultZone: http://fetebird-eurekaservice:8761/eureka/
    instance:
      hostname: fetebird-eurekaservice

每个 docker 文件

ENTRYPOINT ["java", "-jar", "fete-bird-configuration-server-0.0.1-SNAPSHOT.jar"] fetebird-eurekaservice

Docker 撰写文件（添加链接和depends_on）

fetebird-configserver:
        container_name: FeteBird-ConfigServer
        build:
            context: ../../FeteBird-ConfigServer
            dockerfile: Dockerfile
        image: fetebird/configserver
        ports:
            - "8085:8085"
        links:
            - fetebird-eurekaservice
        depends_on:
            - fetebird-eurekaservice
        networks:
            - spring-cloud-network
        volumes:
            - ./fetebird-configserver/data:/data
        logging:
            driver: json-file  

参考 - https://github.com/spring-cloud/spring-cloud-netflix/issues/2442

Answer 2

正如 OP 的回答所指出的：Eureka 不再在 localhost 上运行，在这种情况下，localhost 是各个容器。

我在这里介绍两个额外的解决方案：

解决方案1.使用docker环境

开发环境（在 application.properties 中）：

eureka.client.service-url.defaultZone = http://localhost:8761/eureka 

Docker 环境（覆盖docker-compose.yml文件中的 defaultZone 设置）：

myservice:
    container_name: myservice
    environment:
      eureka.client.service-url.defaultZone: http://<your-eureka-service-name>:8761/eureka

这将覆盖application.properties或application.yml值。

如果你想覆盖 docker 环境中的一堆东西，比如 jdbc 连接，你可以使用SPRING_APPLICATION_JSON （spring 会读取它，因为它嵌入在环境变量或系统属性中）：

myservice:
    container_name: myservice
    environment:
      SPRING_APPLICATION_JSON: '{
        "spring.datasource.url=jdbc:mysql": "//jdbc:mysql:3306/mydb",
        "spring.datasource.username": "username",
        "spring.datasource.password": "password",
        "spring.jpa.hibernate.ddl-auto": "update",
        "eureka.client.service-url.defaultZone": "http://<your-eureka-service-name>:8761/eureka"
        }'

解决方案 2. 设置不同的配置文件：

第一步，准备两个版本的application.properties ，如果你更喜欢application.yml ，你的选择：

开发环境的application-default.properties ：

eureka.client.service-url.defaultZone = http://localhost:8761/eureka 

docker 环境的application-docker.properties ：

eureka.client.service-url.defaultZone = http://<your-eureka-service-name>:8761/eureka

第二步（docker-compose 文件）：

myservice:
    container_name: myservice
    environment:
      SPRING_PROFILES_ACTIVE: docker

通过将SPRING_PROFILES_ACTIVE设置为 docker，它将加载application-docker.properties作为活动配置文件。

参考：

1. Spring 型材

2. Spring 环境特定属性文件

3. 如何动态加载客户端服务中的 SPRING_PROFILES_ACTIVE 值？