Spring-Cloud-Config学习笔记（一）：使用本地存储

简介

Spring Cloud Config为分布式系统中的外部配置提供服务器和客户端支持。使用Config Server，您可以为所有环境中的应用程序管理其外部属性。它非常适合spring应用，也可以使用在其他语言的应用上。
随着应用程序通过从开发到测试和生产的部署流程，您可以管理这些环境之间的配置，并确定应用程序具有迁移时需要运行的一切。
服务器存储后端的默认实现使用git，因此它轻松支持标签版本的配置环境，以及可以访问用于管理内容的各种工具。

Spring Cloud Config服务端特性

• HTTP，为外部配置提供基于资源的API（键值对，或者等价的YAML内容）
• 属性值的加密和解密（对称加密和非对称加密）
• 通过使用@EnableConfigServer在Spring boot应用中非常简单的嵌入。

Config客户端的特性（特指Spring应用）

• 绑定Config服务端，并使用远程的属性源初始化Spring环境。
• 属性值的加密和解密（对称加密和非对称加密）

说明

由于网上一般都是关于git存储的默认式教程，如Spring Cloud Config 分布式配置中心使用教程
但并不是所有公司都使用git，比如我们的生产环境，每个服务都部署在不同的服务器，且无法访问git，所以本文主要记录文件系统存储辅加Eureka服务发现功能的方式。

Server端

依赖

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.yan</groupId>
    <artifactId>spring.cloud.config.server</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/>
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-config-server</artifactId>
        <version>RELEASE</version>
    </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

启动类

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;

@SpringBootApplication
@EnableConfigServer
//@EnableEurekaClient
public class ConfigServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

配置

bootstrap.yml

server:
  port: 8888
spring:
  application:
    name: spring-cloud-config-server
  cloud:
    config:
      server:
        native:
          search-locations: [classpath:/]
  profiles:
    active: native

svcA.yml

server:
  port: 8081
profile: default

svcA-pro.yml

server:
  port: 8082
profile: pro

测试

启动服务，打开网址http://localhost:8888/svcA/pro，返回值：

{
  "name": "svcA",
  "profiles": [
    "pro"
  ],
  "label": null,
  "version": null,
  "state": null,
  "propertySources": [
    {
      "name": "classpath:/svcA-pro.yml",
      "source": {
        "server.port": 8082,
        "profile": "pro"
      }
    },
    {
      "name": "classpath:/svcA.yml",
      "source": {
        "server.port": 8081,
        "profile": "default"
      }
    }
  ]
}

注

如果有返回值，说明我们的配置生效了，从所示URL中可以看出一些端倪，比如，当输入http://localhost:8888/svcA/default，那么应返回：

{
  "name": "svcA",
  "profiles": [
    "default"
  ],
  "label": null,
  "version": null,
  "state": null,
  "propertySources": [
    {
      "name": "classpath:/svcA.yml",
      "source": {
        "server.port": 8081,
        "profile": "default"
      }
    }
  ]
}

官方文档列举了几种内置访问规则：

/{application}/{profile}[/{label}]  <--- 我所采用的方式
/{application}-{profile}.yml
/{label}/{application}-{profile}.yml
/{application}-{profile}.properties
/{label}/{application}-{profile}.properties

由于我们没有使用git，因此没有label也就是分支的概念，所以我们采用不带label的方式访问。
当采用其他方式访问时，结果类似读取配置文件并展示相应内容，如，http://localhost:8888/svcA-pro.yml返回：

profile: pro
server.port: 8082

Client端

依赖

<?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.yan</groupId>
    <artifactId>spring.cloud.config-client-a</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/>
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
            <version>RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>RELEASE</version>
        </dependency>
    </dependencies>


</project>

启动类

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
//@EnableEurekaClient
public class ClientAApplication {

    @Value("${profile}")
    private String profile;

    @GetMapping("/")
    public String home() {
        return profile;
    }

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

}

配置

bootstrap.yml

spring:
  application:
    name: svcA
  profiles:
    active: pro

测试

启动客户端，打印日志如下：

2019-02-22 23:02:36.952  INFO 6252 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'configurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$8bdcd989] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )\___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.0.RELEASE)

2019-02-22 23:02:37.232  INFO 6252 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:8888
2019-02-22 23:02:37.601  INFO 6252 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=svcA, profiles=[pro], label=null, version=null, state=null
2019-02-22 23:02:37.602  INFO 6252 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: CompositePropertySource {name='configService', propertySources=[MapPropertySource {name='classpath:/svcA-pro.yml'}, MapPropertySource {name='classpath:/svcA.yml'}]}
2019-02-22 23:02:37.604  INFO 6252 --- [           main] com.yan.ClientAApplication               : The following profiles are active: pro
2019-02-22 23:02:37.889  INFO 6252 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=02bf1a3c-7880-3f25-a1ec-3fbf92e05730
2019-02-22 23:02:37.903  INFO 6252 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$8bdcd989] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-02-22 23:02:38.078  INFO 6252 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8082 (http)
2019-02-22 23:02:38.089  INFO 6252 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-02-22 23:02:38.089  INFO 6252 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/9.0.12
2019-02-22 23:02:38.095  INFO 6252 --- [           main] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [D:Program FilesJavajdk1.8.0_191in;C:WindowsSunJavain;C:Windowssystem32;C:Windows;C:ProgramDataOracleJavajavapath;C:Program Files (x86)Common FilesOracleJavajavapath;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsiCLS;C:Program FilesIntelIntel(R) Management Engine ComponentsiCLS;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:WindowsSystem32OpenSSH;C:Program Files (x86)NVIDIA CorporationPhysXCommon;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsDAL;C:Program FilesIntelIntel(R) Management Engine ComponentsDAL;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsIPT;C:Program FilesIntelIntel(R) Management Engine ComponentsIPT;C:Program FilesIntelWiFiin;C:Program FilesCommon FilesIntelWirelessCommon;D:Program FilesJavajdk1.8.0_191in;D:Program FilesGitcmd;D:Program Filesapache-maven-3.6.0in;D:Program Filesgradle-5.0in;D:uildtoolsbtin;C:UsersYanAppDataLocalMicrosoftWindowsApps;;.]
2019-02-22 23:02:38.196  INFO 6252 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-02-22 23:02:38.196  INFO 6252 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 582 ms
2019-02-22 23:02:38.210  INFO 6252 --- [           main] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
2019-02-22 23:02:38.214  INFO 6252 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2019-02-22 23:02:38.214  INFO 6252 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-02-22 23:02:38.214  INFO 6252 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'formContentFilter' to: [/*]
2019-02-22 23:02:38.214  INFO 6252 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2019-02-22 23:02:38.328  INFO 6252 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-02-22 23:02:38.736  INFO 6252 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8082 (http) with context path ''
2019-02-22 23:02:38.738  INFO 6252 --- [           main] com.yan.ClientAApplication               : Started ClientAApplication in 2.557 seconds (JVM running for 3.245)

可以看到，我们的端口，已经正确读取，那么，profile是否能正确返回呢？打开http://localhost:8082/发现正确返回了期待值pro。

集成Eureka

新建Maven服务spring-cloud-eureka-server。

依赖

<?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.yan</groupId>
    <artifactId>spring.cloud.eureka.server</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/>
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
            <version>RELEASE</version>
        </dependency>
    </dependencies>

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

</project>

启动类

EurekaServerApplication.java

import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args) {
        new SpringApplicationBuilder(EurekaServerApplication.class)
                .web(WebApplicationType.SERVLET).run(args);
    }
}

配置

application.yaml

spring:
  application:
    name: eureka-server
server:
  port: 8761
eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false
    fetch-registry: false

测试

打开localhost:8761，正确返回Eureka页面即可。

集成Config

无论是config-server还是config-client-x，集成方式都差不多，唯一的区别是，config-server服务，不需要额外添加配置，此处只以client-a服务举例。

依赖

添加如下依赖：

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>RELEASE</version>
        </dependency>

开启服务发现功能注解

在启动类上添加注解@EnableEurekaClient

集成配置

注意，如果是config-server，则只需要添加eureka.client.serviceUrl.defaultZone的配置

bootstrap.yml

spring:
  cloud:
    config:
      discovery:
        enabled: true
        service-id: spring-cloud-config-server

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

注

此处发现一个问题，就是当服务多了之后，是否使用类似于包的文件夹将其分类存放起来，这样比较人性化，比如，我现在的配置文件夹结构如下：

|- resources
    |- bootstrap.yml
    |- svcA.yml
    |- svcA-pro.yml

当服务多了之后，我可以根据情况变为这样：

|- resources
    |- bootstrap.yml
    |- svcA
        |- svcA.yml
        |- svcA-pro.yml
    |- svcB
        |- svcB.yml
        |- svcB-pro.yml
    |- svc...

此时，配置就需要发生变更了：

spring:
      server:
        native:
          search-locations: [classpath:/svcA, classpath:/svcB, classpath:/svc...]

为了方便区分，我将svcA-pro.yml中的server.port=8087*

测试

1. 启动eureka
2. 启动config-server
3. 启动config-client-a

查看config-client-a启动日志：

2019-02-23 00:31:12.489  INFO 3244 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://YanWei:8881/
2019-02-23 00:31:12.807  INFO 3244 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=svcA, profiles=[pro], label=null, version=null, state=null
2019-02-23 00:31:12.808  INFO 3244 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: CompositePropertySource {name='configService', propertySources=[MapPropertySource {name='classpath:/svcConf/svcA-pro.yml'}]}
2019-02-23 00:31:12.810  INFO 3244 --- [           main] com.yan.ClientAApplication               : The following profiles are active: pro
2019-02-23 00:31:13.169  INFO 3244 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=f4124a52-0b01-3d76-8de4-d5ad3011d33a
2019-02-23 00:31:13.207  INFO 3244 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$6d30854e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-02-23 00:31:13.392  INFO 3244 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8087 (http)
2019-02-23 00:31:13.405  INFO 3244 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-02-23 00:31:13.405  INFO 3244 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/9.0.12
2019-02-23 00:31:13.410  INFO 3244 --- [           main] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [D:Program FilesJavajdk1.8.0_191in;C:WindowsSunJavain;C:Windowssystem32;C:Windows;C:ProgramDataOracleJavajavapath;C:Program Files (x86)Common FilesOracleJavajavapath;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsiCLS;C:Program FilesIntelIntel(R) Management Engine ComponentsiCLS;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:WindowsSystem32OpenSSH;C:Program Files (x86)NVIDIA CorporationPhysXCommon;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsDAL;C:Program FilesIntelIntel(R) Management Engine ComponentsDAL;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsIPT;C:Program FilesIntelIntel(R) Management Engine ComponentsIPT;C:Program FilesIntelWiFiin;C:Program FilesCommon FilesIntelWirelessCommon;D:Program FilesJavajdk1.8.0_191in;D:Program FilesGitcmd;D:Program Filesapache-maven-3.6.0in;D:Program Filesgradle-5.0in;D:uildtoolsbtin;C:UsersYanAppDataLocalMicrosoftWindowsApps;;.]
2019-02-23 00:31:13.544  INFO 3244 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-02-23 00:31:13.544  INFO 3244 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 726 ms
2019-02-23 00:31:13.560  INFO 3244 --- [           main] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
2019-02-23 00:31:13.564  INFO 3244 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2019-02-23 00:31:13.564  INFO 3244 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-02-23 00:31:13.564  INFO 3244 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'formContentFilter' to: [/*]
2019-02-23 00:31:13.564  INFO 3244 --- [           main] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2019-02-23 00:31:13.588  WARN 3244 --- [           main] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources.
2019-02-23 00:31:13.588  INFO 3244 --- [           main] c.n.c.sources.URLConfigurationSource     : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2019-02-23 00:31:13.592  WARN 3244 --- [           main] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources.
2019-02-23 00:31:13.592  INFO 3244 --- [           main] c.n.c.sources.URLConfigurationSource     : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2019-02-23 00:31:13.736  INFO 3244 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-02-23 00:31:14.296  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Shutting down DiscoveryClient ...
2019-02-23 00:31:14.300  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Completed shut down of DiscoveryClient
2019-02-23 00:31:14.301  WARN 3244 --- [           main] arterDeprecationWarningAutoConfiguration : spring-cloud-starter-eureka is deprecated as of Spring Cloud Netflix 1.4.0, please migrate to spring-cloud-starter-netflix-eureka
2019-02-23 00:31:14.354  INFO 3244 --- [           main] o.s.c.n.eureka.InstanceInfoFactory       : Setting initial instance status as: STARTING
2019-02-23 00:31:14.357  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Initializing Eureka in region us-east-1
2019-02-23 00:31:14.359  INFO 3244 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using JSON encoding codec LegacyJacksonJson
2019-02-23 00:31:14.359  INFO 3244 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using JSON decoding codec LegacyJacksonJson
2019-02-23 00:31:14.359  INFO 3244 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using XML encoding codec XStreamXml
2019-02-23 00:31:14.359  INFO 3244 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using XML decoding codec XStreamXml
2019-02-23 00:31:14.435  INFO 3244 --- [           main] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Disable delta property : false
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Single vip registry refresh property : null
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Force full registry fetch : false
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Application is null : false
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Registered Applications size is zero : true
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Application version is -1: true
2019-02-23 00:31:14.436  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Getting all instance registry info from the eureka server
2019-02-23 00:31:14.439  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : The response status is 200
2019-02-23 00:31:14.440  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Starting heartbeat executor: renew interval is: 30
2019-02-23 00:31:14.441  INFO 3244 --- [           main] c.n.discovery.InstanceInfoReplicator     : InstanceInfoReplicator onDemand update allowed rate per min is 4
2019-02-23 00:31:14.442  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Discovery Client initialized at timestamp 1550853074442 with initial instances count: 4
2019-02-23 00:31:14.443  INFO 3244 --- [           main] o.s.c.n.e.s.EurekaServiceRegistry        : Registering application svcA with eureka with status UP
2019-02-23 00:31:14.443  INFO 3244 --- [           main] com.netflix.discovery.DiscoveryClient    : Saw local status change event StatusChangeEvent [timestamp=1550853074443, current=UP, previous=STARTING]
2019-02-23 00:31:14.444  INFO 3244 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_SVCA/YanWei:svcA:8087: registering service...
2019-02-23 00:31:14.466  INFO 3244 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_SVCA/YanWei:svcA:8087 - registration status: 204
2019-02-23 00:31:14.469  INFO 3244 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8087 (http) with context path ''
2019-02-23 00:31:14.471  INFO 3244 --- [           main] com.yan.ClientAApplication               : Started ClientAApplication in 4.293 seconds (JVM running for 4.981)

可以看到，其读取配置的URL发生了改变，集成之前，默认访问http://localhost:8888,而此时，访问地址变成了 http://YanWei:8881/,并且正确读取了端口号8087，这说明我们的Eureka集成成功了.