Zuul 网关无法连接到 Docker-Compose 下的 Eureka 服务注册表

Question

当我通过 Spring-Boot 可运行的 jar 文件独立启动 Eureka 和 Zuul 时，一切似乎都正常。但是当我尝试在 Docker 容器中运行每个容器并使用 Docker-Compose 连接它们时，Zuul 网关无法找到 Eureka 服务器。

docker-compose.yml：

version: '3.6'
services:
eureka-serviceregistry:
container_name: serviceregistry
build: ./ServiceRegistry
ports:
- "8761:8761"
hostname: serviceregistry
environment:
eureka.client.serviceUrl.defaultZone: http://serviceregistry:8761/eureka/
zuul-edgeservice:
container_name: gateway
build: ./ServiceGateway
ports:
- "8080:8080"
hostname: gateway
environment:
eureka.client.serviceUrl.defaultZone: http://serviceregistry:8761/eureka/

尤里卡·多克文件：

FROM openjdk:8-jdk-alpine
# Add Spring Boot app.jar to Container
COPY /build/libs/ServiceRegistry-0.0.1-SNAPSHOT.jar /usr/local/ServiceRegistry.jar
EXPOSE 8761
# Fire up our Spring Boot app by default
ENTRYPOINT [ "sh", "-c", "java -Djava.security.egd=file:/dev/./urandom -jar /usr/local/ServiceRegistry.jar" ]

Eureka application.properties：

server.port=8761
spring.application.name=EurekaServiceRegistry
eureka.client.register-with-eureka=true
eureka.client.fetch-registry=false
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka
eureka.instance.hostname=EurekaServiceRegistry
logging.level.com.netflix.eureka=INFO
logging.level.com.netflix.discovery=INFO

尤里卡弹簧靴类：

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

Zuul Dockerfile：

FROM openjdk:8-jdk-alpine
# Add Spring Boot app.jar to Container
COPY /build/libs/ServiceGateway-0.0.1-SNAPSHOT.jar /usr/local/ServiceGateway.jar
EXPOSE 8080
# Fire up our Spring Boot app by default
ENTRYPOINT [ "sh", "-c", "java -Djava.security.egd=file:/dev/./urandom -jar /usr/local/ServiceGateway.jar" ]

Zuul application.properties：

zuul.routes.auth.path=/enterprise_service/**
zuul.routes.auth.service-id=ENTERPRISE_SERVICE
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka

祖尔弹簧靴类：

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

根构建.gradle 文件：

buildscript {
ext {
springBootVersion = '2.0.1.RELEASE'
}
repositories {
jcenter()
}
dependencies {
classpath "org.jfrog.buildinfo:build-info-extractor-gradle:4+"
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
subprojects {
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'com.jfrog.artifactory'
apply plugin: 'maven-publish'
sourceCompatibility = 1.8
targetCompatibility = 1.8
artifactory {
contextUrl = "${artifactory_contextUrl}"
publish {
repository {
repoKey = 'gradle-dev-local'
username = "${artifactory_user}"
password = "${artifactory_password}"
maven = true
}
defaults {
publications ('mavenJava')
}
}
resolve {
repository {
repoKey = 'gradle-dev'
username = "${artifactory_user}"
password = "${artifactory_password}"
maven = true
}
}
}
publishing {
publications {
mavenJava(MavenPublication) {
from components.java
}
}
}
artifactoryPublish {
dependsOn assemble
}
dependencyManagement {
imports {
mavenBom 'org.springframework.cloud:spring-cloud-dependencies:Finchley.M8'
}
}
repositories {
maven {
url 'https://repo.spring.io/libs-milestone'
}
}
dependencies {
compile('org.springframework.boot:spring-boot-starter-actuator')
compile('org.springframework.boot:spring-boot-starter-web')
testCompile('org.springframework.boot:spring-boot-starter-test')
}
bootJar {
launchScript()
}
}

尤里卡子项目gradle文件：

group = 'my.company.service.infrastructure.registry'
version = '0.0.1-SNAPSHOT'
dependencies {
compile('org.springframework.cloud:spring-cloud-starter-netflix-eureka-server')
}

Zuul 子项目 gradle 文件：

group = 'my.company.service.infrastructure.gateway'
version = '0.0.1-SNAPSHOT'
dependencies {
compile('org.springframework.cloud:spring-cloud-starter-netflix-zuul')
compile('org.springframework.cloud:spring-cloud-starter-netflix-eureka-client')
}

在 Zuul 日志中，当它尝试向 Eureka 注册时，这种错误模式一遍又一遍：

2018-04-11 15：38：20.136 信息 6 --- [nfoReplicator-0]>com.netflix.discovery.DiscoveryClient ： DiscoveryClient_UNKNOWN/gateway：>注册服务... 2018-04-11 15：38：20.139 错误 6 --- [nfoReplicator-0]>c.n.d.s.t.d.重定向EurekaHttpClient ： 请求执行错误

com.sun.jersey.api.client.Client.HandlerException： java.net.ConnectException：>连接被拒绝(连接被拒绝) at>com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4>Handler.java：187) ~[jersey-apache-client4-1.19.1.jar！/：1.19.1] at>com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEn>codingFilter.java：123) ~[jersey-client-1.19.1.jar！/：1.19.1] at>com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFil>ter.java：27) ~[eureka-client-1.8.6.jar！/：1.8.6] at com.sun.jersey.api.client.Client.handle(Client.java：652) ~[jersey-client->1.19.1.jar！/：1.19.1] at com.sun.jersey.api.client.WebResource.handle(WebResource.java：682) ~>>[jersey-client-1.19.1.jar！/：1.19.1] at com.sun.jersey.api.client.WebResource.access$200(WebResource.java：74) ~>[jersey-client-1.19.1.jar！/：1.19.1] at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java：570)>~[jersey-client-1.19.1.jar！/：1.19.1] at>com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.re>gister(AbstractJerseyEurekaHttpClient.java：56) ~[eureka-client->1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.ex>ecute(EurekaHttpClientDecorator.java：59) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpCli>ent.execute(MetricsCollectingEurekaHttpClient.java：73) ~[eureka-client->1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.ex>ecute(EurekaHttpClientDecorator.java：59) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.ex>ecuteOnNewServer(RedirectingEurekaHttpClient.java：118) ~[eureka-client->1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.ex>ecute(RedirectingEurekaHttpClient.java：79) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.ex>ecute(EurekaHttpClientDecorator.java：59) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.exec>ute(RetryableEurekaHttpClient.java：119) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.ex>ecute(EurekaHttpClientDecorator.java：59) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.exec>ute(SessionedEurekaHttpClient.java：77) [eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) [eureka-client-1.8.6.jar！/：1.8.6] at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java：829)>[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java：10>4) [eureka-client-1.8.6.jar！/：1.8.6] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java：511)>[na：1.8.0_151] at java.util.concurrent.FutureTask.run(FutureTask.java：266) [na：1.8.0_151] at>java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201>(ScheduledThreadPoolExecutor.java：180) [na：1.8.0_151]at>java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Schedu>ledThreadPoolExecutor.java：293) [na：1.8.0_151] at>java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java：1149)>[na：1.8.0_151] at>java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java：624)>[na：1.8.0_151] at java.lang.Thread.run(Thread.java：748) [na：1.8.0_151] 原因：java.net.Connect异常：连接被拒绝(连接被拒绝) at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na：1.8.0_151] at>java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java：350) ~>[na：1.8.0_151] at>java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java：>206) ~[na：1.8.0_151] at>java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java：188) ~>[na：1.8.0_151] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java：392) ~>[na：1.8.0_151] at java.net.Socket.connect(Socket.java：589) ~[na：1.8.0_151] at>org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory>.java：121) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(Defaul>tClientConnectionOperator.java：180) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java：144) ~>[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdap>ter.java：134) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDir>ector.java：610) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirect>or.java：445) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.jav>a：835) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.jav>a：118) ~[httpclient-4.5.5.jar！/：4.5.5] at>org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.jav>a：56) ~[httpclient-4.5.5.jar！/：4.5.5] at>com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4>Handler.java：173) ~[jersey-apache-client4-1.19.1.jar！/：1.19.1] ...省略了 29 个常见帧

2018-04-11 15：38：20.140 警告 6 --- [nfoReplicator-0]>c.n.d.s.t.d.RetryableEurekaHttpClient ： 请求执行失败，并显示>消息： java.net.ConnectException： 连接被拒绝(连接被拒绝) 2018-04-11 15：38：20.140 警告 6 --- [nfoReplicator-0]>com.netflix.discovery.DiscoveryClient ： DiscoveryClient_UNKNOWN/网关 ->注册失败 无法在任何已知服务器上执行请求

com.netflix.discovery.shared.transport.TransportException：无法在任何已知服务器上执行>请求 at>com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.exec>ute(RetryableEurekaHttpClient.java：111) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.ex>ecute(EurekaHttpClientDecorator.java：59) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.exec>ute(SessionedEurekaHttpClient.java：77) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) ~[eureka-client-1.8.6.jar！/：1.8.6] at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java：829)>~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java：10>4) [eureka-client-1.8.6.jar！/：1.8.6] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java：511)>[na：1.8.0_151] at java.util.concurrent.FutureTask.run(FutureTask.java：266) [na：1.8.0_151] at>java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201>(ScheduledThreadPoolExecutor.java：180) [na：1.8.0_151] at>java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Schedu>ledThreadPoolExecutor.java：293) [na：1.8.0_151] at>java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java：1149)>[na：1.8.0_151] at>java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java：624)>[na：1.8.0_151] at java.lang.Thread.run(Thread.java：748) [na：1.8.0_151]

2018-04-11 15：38：20.141 警告 6 --- [nfoReplicator-0]>c.n.discovery.InstanceInfoReplicator：>实例信息复制器出现问题

com.netflix.discovery.shared.transport.TransportException：无法在任何已知服务器上执行>请求at>com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.exec>ute(RetryableEurekaHttpClient.java：111) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.ex>ecute(EurekaHttpClientDecorator.java：59) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.exec>ute(SessionedEurekaHttpClient.java：77) ~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.regi>ster(EurekaHttpClientDecorator.java：56) ~[eureka-client-1.8.6.jar！/：1.8.6] at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java：829)>~[eureka-client-1.8.6.jar！/：1.8.6] at>com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java：10>4) ~[eureka-client-1.8.6.jar！/：1.8.6] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java：511)>[na：1.8.0_151] at java.util.concurrent.FutureTask.run(FutureTask.java：266) [na：1.8.0_151] at>java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201>(ScheduledThreadPoolExecutor.java：180) [na：1.8.0_151] at>java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Schedu>ledThreadPoolExecutor.java：293) [na：1.8.0_151] at>java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java：1149)>[na：1.8.0_151] at>java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java：624)>[na：1.8.0_151] at java.lang.Thread.run(Thread.java：748) [na：1.8.0_151]

2018-04-11 15：38：50.043 错误 6 --- [tbeatExecutor-0]>c.n.d.s.t.d.RedirectingEurekaHttpClient ： 请求执行错误

Answer 1

尝试在尤里卡服务器下的application.properties中替换为 spring.application.name=serviceregistry
eureka.instance.hostname=ServiceRegistry。

Answer 2

问题是 YAML 语法错误。

以下 docker-compose.yml 工作。请注意环境部分。

version: '3.6'
services:
eureka-serviceregistry:
container_name: serviceregistry
build: ./ServiceRegistry
ports:
- 8761:8761
hostname: serviceregistry
environment:
- EUREKA_CLIENT_SERVICEURL_DEFAULTZONE=http://serviceregistry:8761/eureka
zuul-edgeservice:
container_name: gateway
build: ./ServiceGateway
ports:
- 8080:8080
hostname: gateway
environment:
- EUREKA_CLIENT_SERVICEURL_DEFAULTZONE=http://serviceregistry:8761/eureka