SpringCloud 教程 | 第六篇: 分佈式配置中心 (Spring Cloud Config)

時間 2019-11-16

標籤 springcloud 教程第六分佈式配置中心 spring cloud config 欄目系統架構简体版

原文原文鏈接

轉載請標明出處：
blog.csdn.net/forezp/arti…
本文出自方誌朋的博客
在上一篇文章講述zuul的時候，已經提到過，使用配置服務來保存各個服務的配置文件。它就是Spring Cloud Config。javascript

1、簡介

在分佈式系統中，spring cloud config 提供一個服務端和客戶端去提供可擴展的配置服務。咱們可用用配置服務中心區集中的管理全部的服務的各類環境配置文件。配置服務中心採用git的方式存儲配置文件，所以咱們很容易部署修改，有助於對環境配置進行版本管理。html

2、構建Config Server

建立一個spring-boot項目，取名爲config-server,其pom.xml:java

<?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.forezp</groupId>
    <artifactId>config-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>config-server</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.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-config-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

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

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR6</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>複製代碼

在程序的入口Application類加上@EnableConfigServer註解開啓配置服務器。git

@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}複製代碼

須要在配置中心配置下：github

spring.application.name=config-server
server.port=8888


spring.cloud.config.server.git.uri=https://github.com/forezp/SpringcloudConfig/
spring.cloud.config.server.git.searchPaths=respo
spring.cloud.config.label=master
spring.cloud.config.server.git.username=your username
spring.cloud.config.server.git.password=your password複製代碼

spring.cloud.config.server.git.uri：配置git倉庫地址
spring.cloud.config.server.git.searchPaths：配置倉庫路徑
spring.cloud.config.label：配置倉庫的分支
spring.cloud.config.server.git.username：訪問git倉庫的用戶名
spring.cloud.config.server.git.password：訪問git倉庫的用戶密碼

遠程倉庫github.com/forezp/Spri… 中又個文件config-client-dev.properties文件中有一個屬性：web

foo = foo version 3spring

啓動程序：訪問http://localhost:8888/foo/devapache

{"name":"foo","profiles":["dev"],"label":"master",
"version":"792ffc77c03f4b138d28e89b576900ac5e01a44b","state":null,"propertySources":[]}複製代碼

證實配置服務中心能夠從遠程程序獲取配置信息。springboot

http請求地址和資源文件映射以下:服務器

/{application}/{profile}[/{label}]
/{application}-{profile}.yml
/{label}/{application}-{profile}.yml
/{application}-{profile}.properties
/{label}/{application}-{profile}.properties

3、構建一個config client

從新建立一個springboot項目，取名爲config-client,其pom文件：

<?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.forezp</groupId>
    <artifactId>config-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>config-client</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.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-config</artifactId>
        </dependency>

        <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>
                <version>Dalston.RC1</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>複製代碼

其配置文件：

spring.application.name=config-client
spring.cloud.config.label=master
spring.cloud.config.profile=dev
spring.cloud.config.uri= http://localhost:8888/
server.port=8881複製代碼

spring.cloud.config.label 指明遠程倉庫的分支
spring.cloud.config.profile
- dev開發環境配置文件
- test測試環境
- pro正式環境
spring.cloud.config.uri= http://localhost:8888/ 指明配置服務中心的網址。

程序的入口類：

@SpringBootApplication
@RestController
public class ConfigClientApplication {

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

    @Value("${foo}")
    String foo;
    @RequestMapping(value = "/hi")
    public String hi(){
        return foo;
    }
}複製代碼