SpringCloud-Config分布式配置中心


一、基本使用

1. Config-Server端

(1)pom:

  1. parent依賴
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
    </parent>
  2. dependencyManagement
    <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>
  3. dependencies
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
    </dependencies>
<?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">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>ConfigServer</artifactId>
    <version>1.0.0</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <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>
        </dependency>
    </dependencies>
</project>
查看全部pom代碼

(2)啟動類:增加注解@EnableConfigServer,當然@SpringBootApplication也是必不可少的

package com.luych.configServer;

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

@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {

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

}
查看全部啟動類代碼

(3)application.yml

如果用git作配置倉庫,則:

spring:
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/LOVE0612/SpringCloud.git
          username: 562759534@qq.com
          password: 123@abc
  • 如果希望ConfigServer啟動的時候就將配置文件clone下來,則可增加配置:spring.cloud.config.server.git.clone-on-start=true。
  • 如果配置文件不在git倉庫的根目錄下, 例如:如果配置文件在git倉庫的properties目錄下,則可增加配置spring.cloud.config.server.git.search-paths=properties。當有多個目錄時逗號分隔。
  • 如果需要制定git clone后在本地存儲位置,則可增加配置spring.cloud.config.server.git.baseDir。

如果用svn作配置倉庫,則:

spring:
  cloud:
    config:
      server:
        svn:
          uri: https://192.168.1.111/svn/SpringCloud
          username: luyanchao
          password: abc@123
  • 同樣存在spring.cloud.config.server.svn.search-paths配置項,使用方法同git。
  • 同樣存在spring.cloud.config.server.git.baseDir配置項,使用方法同git。

如果使用本地文件系統作配置倉庫,則:

spring:
  cloud:
    config:
      server:
        native:
          search-locations: properties
      profile: native
  • search-locations:可以是絕對路徑也可以是classpath路徑。
  • 使用本地文件系統作為配置倉庫的最大缺點在於:如果ConfigServer多點部署以保證高可用時,需要將文件系統進行共享。

如果使用多種/多個配置倉庫,則:

spring:
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/LOVE0612/SpringCloud.git
          username: 562759534@qq.com
          password: 1226ai0612
          order: 1
        svn:
          uri: https://192.168.1.111/svn/SpringCloud
          username: luyanchao
          password: abc@123
          order: 2
        native:
          search-locations: properties
          order: 3
      profile: native, git, svn
  • profile:設定哪些配置倉庫可用,逗號分隔
  • order:配置倉庫的優先級順序,數字越低優先級越高
server:
  port: 51011

spring:
  application:
    name: ConfigServer
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/LOVE0612/SpringCloud.git
          search-paths: properties
          username: 562759534@qq.com
          password: 123@abc
          clone-on-start: true
查看本例全部application.yml代碼

(3)run,並測試

ConfigServer提供多種rest接口訪問配置信息,可通過run日志查看:

Mapped "{[/{name}-{profiles}.properties],methods=[GET]}" onto ...
Mapped "{[/{name}-{profiles}.yml || /{name}-{profiles}.yaml],methods=[GET]}" onto ...
Mapped "{[/{name}/{profiles:.*[^-].*}],methods=[GET]}" onto ...
Mapped "{[/{label}/{name}-{profiles}.properties],methods=[GET]}" onto ...
Mapped "{[/{label}/{name}-{profiles}.json],methods=[GET]}" onto ...
Mapped "{[/{label}/{name}-{profiles}.yml || /{label}/{name}-{profiles}.yaml],methods=[GET]}" onto...
Mapped "{[/{name}/{profiles}/{label:.*}],methods=[GET]}" onto ...
Mapped "{[/{name}-{profiles}.json],methods=[GET]}" onto ...
Mapped "{[/{name}/{profile}/{label}/**],methods=[GET],produces=[application/octet-stream]}" onto ...
Mapped "{[/{name}/{profile}/{label}/**],methods=[GET]}" onto ...
Mapped "{[/{name}/{profile}/**],methods=[GET],params=[useDefaultLabel]}" onto...
  • 參數name:即ConfigClient中定義的spring.application.name的值,后續會講到
  • 參數profiles:這個不需要多說,用過SpringBoot的應該都知道
  • 參數label:如果是git或svn,label對應的是分之;如果是本地文件系統,label對應子目錄名,例如:classpath:properties/{label}

2. Config-Client端

(1)pom:

  1. parent依賴
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
    </parent>
  2. dependencyManagement
    <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>
  3. dependencies
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-client</artifactId>
        </dependency>
    </dependencies>

(2)啟動類:有@SpringBootApplication即可

(3)bootstrap.yml,注意這里不是application.yml哦

spring:
  application:
    name: ServiceGateway
  cloud:
    config:
      uri: http://127.0.0.1:51011
      profile: company
  • spring.application.name:項目名稱
  • spring.cloud.config.uri:ConfigServer的地址
  • spring.cloud.config.profile:這個不需要多說,用過SpringBoot的應該都知道

根據以上配置內容,可得知最終調用ConfigServer的接口地址為:http://127.0.0.1:51011/ServiceGateway-company.yml

3. 多個Config-Client端公用配置

如果多個Config-Client中有部分配置是相同的,為了避免出現重復代碼,我們可以把這部分相同的配置抽出來單獨做一個配置文件,命名為:application.yml、application.properties,或application-*.yml、application-*.properties,然后放到Config-Server端即可。


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