內建Eureka-server和Eureka-cliet以及遇到的各種問題總結

環境配置Eureka-server

application.properties配置：

server.port=8761
 
eureka.instance.hostname=localhost
 
#代表不向注冊中心注冊自己
eureka.client.register-with-eureka=false
 
#維護服務執行個體，不需要檢索服務
eureka.client.fetch-registry=false
 
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka
           

pom.xml檔案

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.unistrong</groupId>
	<artifactId>eureka-servser</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka-servser</name>
	<description>Demo project for Spring Boot</description>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
  </properties>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <dependencies>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <!-- RELEASE -->
       <version>Finchley.RELEASE</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

  <repositories>
    <repository>
      <id>spring-milestones</id>
      <name>Spring Milestones</name>
      <url>https://repo.spring.io/milestone</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>
</project>

           

類配置：

@SpringBootApplication
@EnableEurekaServer
public class EurekaServserApplication {

	public static void main(String[] args) {
		SpringApplication.run(EurekaServserApplication.class, args);
	}
}

           

Eureka-client:

application.properties配置：

spring.application.name=eureka-server
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka
           

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.unistrong</groupId>
	<artifactId>eureka-client</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka-client</name>
	<description>微服務建構</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.5.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>


  <dependencies>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
    <!--一定要加入這個依賴  -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>  
    </dependency> 
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <!-- RELEASE -->
        <version>Finchley.RELEASE</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>
           

類的配置：

@SpringBootApplication
@EnableDiscoveryClient
public class EurekaClientApplication {

	public static void main(String[] args) {
		SpringApplication.run(EurekaClientApplication.class, args);
	}
}
           

1.Springboot和Springclould版本問題？

第一種情況：啟動報錯，啟動不了aplication，版本有問題不相容

第二種情況：正常啟動，各種配置沒有問題，注冊服務中心找不到，比如服務端配置：

server.port=8888
 
eureka.instance.hostname=localhost
 
#代表不向注冊中心注冊自己
eureka.client.register-with-eureka=false
 
#維護服務執行個體，不需要檢索服務
eureka.client.fetch-registry=false
 
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka
----------------------------------------------------------------------------------------
maven依賴
<dependencies>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        
        <!-- 重點：Finchley.RELEASE是相容的，下面定義的版本和springboot是不相容的 -->
       <version>Finchley.SR1</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
           

啟動項目：

This application has no explicit mapping for /error, so you are seeing this as a fallback.
           

内心是崩潰的，網上各種找都是說版本不一緻，啟動就會報錯，我就堅信了，于是弄了幾天都沒找到問題，springclould官方給出的springboot和springcloud給出的版本也是這樣的,，但是版本依然是有問題，需要換版本。

2.Eureka-clinet配置沒有什麼問題，和别人使用的配置是一樣的，但是Finchley.RELEASE版本啟動的用戶端的時候是這樣的

控制台顯示沒有成功的資訊

Registered instance EUREKA-SERVER/edz-PC:eureka-server:9090 with status DOWN (replication=false)
           

控制台資訊顯示成功的資訊

DiscoveryClient_EUREKA-SERVER/edz-PC:eureka-server:9090 - registration status: 204
           

使用Finchley.RELEASE版本一定要引入web

<!--一定要加入這個依賴  -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>  
    </dependency>