微服務SpringCloud之Spring Cloud Config配置中心服務化

時間 2019-11-06

標籤微服 springcloud spring cloud config 配置中心服務欄目 Spring 简体版

原文原文鏈接

在前面兩篇Spring Cloud Config配置中心的博客中都是須要指定配置服務的地址url：spring.cloud.config.uri，客戶端都是直接調用配置中心的server端來獲取配置文件信息。若是server端要作集羣，客戶端只能經過原始的方式來路由，server端改變IP地址的時候，客戶端也須要修改配置，不符合springcloud服務治理的理念。springcloud提供了這樣的解決方案，咱們只須要將server端當作一個服務註冊到eureka中，client端去eureka中去獲取配置中心server端的服務既可。html

1、Server端改造java

1.添加依賴web

在SpringCloudConfigServer項目中，添加spring-cloud-starter-netflix-eureka-client引用。spring

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

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<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>SpringCloudConfigServer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>SpringCloudConfigServer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </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>
                <version>${spring-cloud.version}</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>

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2.增長了eureka註冊中心的配置apache

在application.properties中增長eureka註冊中心的配置，http://localhost:8088是後面啓動的eureka server的地址bootstrap

eureka.client.serviceUrl.defaultZone=http://localhost:8088/eureka/

3.增長註解瀏覽器

在main方法中增長@EnableDiscoveryClient註解tomcat

2、客戶端改造app

一、添加依賴maven

也是引入spring-cloud-starter-netflix-eureka-client。

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>SpringCloudConfigClient</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>SpringCloudConfigClient</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </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>
                <version>${spring-cloud.version}</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>

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2.配置文件

在bootstrap.properties中去掉指定配置服務的地址url，增長了最後的三個配置：

spring.cloud.config.name=neo-config
spring.cloud.config.profile=dev
spring.cloud.config.label=
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.serviceId=spring-cloud-config-server
eureka.client.serviceUrl.defaultZone=http://localhost:8088/eureka/

spring.cloud.config.discovery.enabled ：開啓Config服務發現支持
spring.cloud.config.discovery.serviceId ：指定server端的name,也就是server端spring.application.name的值
eureka.client.serviceUrl.defaultZone ：指向註冊中心的地址

3.啓動類增長註解

在main方法中增長註解@EnableDiscoveryClient。

3、測試

1.分別啓動eureka server、SpringCloudConfigServer、SpringCloudConfigClient。

2.瀏覽器輸入http://localhost:8088/，能夠看到注入到eureka server中的服務。

3.輸入http://localhost:8001/neo-config/dev，能夠看到配置文件的配置信息。

4.輸入http://localhost:8002/hello，能夠讀取到配置文件的屬性信息

參考：http://www.ityouknow.com/springcloud/2017/05/25/springcloud-config-eureka.html