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微服務之springCloud-config-bus(十三)

本文轉載自   查看原文   2018-01-10 16:05   2946    spring cloud

 

簡介

當我們的業務系統越來越龐大復雜的時候，各種配置就會層出不群。一旦配置修改了，那么我們就是必須修改后停服務，然后再上線，如果服務少，我們可以手動來操作，如果是成千上百的服務，如果是手動操作，肯定就不合適宜了，然后SpringCloudConfig就出來了，就是我們通常意義上的配置中心，把應用原本放在本地文件的配置抽取出來放在中心服務器，從而能夠提供更好的管理、發布能力。

SpringCloudConfig分服務端和客戶端，服務端負責將git（svn或本地文件系統）中存儲的配置文件發布成REST接口，客戶端可以從服務端REST接口獲取配置。但客戶端並不能主動感知到配置的變化，從而主動去獲取新的配置，這需要每個客戶端通過POST方法觸發各自的/refresh。

SpringCloudBus通過一個輕量級消息代理連接分布式系統的節點。這可以用於廣播狀態更改（如配置更改）或其他管理指令。SpringCloudBus提供了通過POST方法訪問的endpoint/bus/refresh，這個接口通常由git的webhook功能調用，用以通知各個SpringCloudConfig的客戶端去服務端更新配置，本節就講怎么搭建一套自動刷新的spring cloud config

一、創建模塊

模塊結構如下：

二、maven聚合模塊microservice-config的pom.xml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">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.5.RELEASE</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.jacky</groupId>
    <artifactId>miroservice-config</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>microservice-config-server</module>
        <module>microservice-config-eureka</module>
        <module>microservice-config-client</module>
    </modules>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <docker.image.prefix>jacky</docker.image.prefix><!--配置鏡像倉庫的屬性-->
        <docker.repostory>192.168.6.132:5000</docker.repostory><!--配置鏡像倉庫的對應的地址與端口-->
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR7</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>
        <!--添加利用maven插件構建docker鏡像的插件依賴-->
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>com.spotify</groupId>
                    <artifactId>docker-maven-plugin</artifactId>
                    <version>0.4.13</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

</project>

三、配置中心模塊（microservice-config-eureka）

3.1、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">
    <parent>
        <artifactId>miroservice-config</artifactId>
        <groupId>com.jacky</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservice-config-eureka</artifactId>
    <packaging>jar</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

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

    <build>
        <plugins>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <executions>
                    <!--設置在執行maven 的install時構建鏡像-->
                    <execution>
                        <id>build-image</id>
                        <phase>install</phase>
                        <goals>
                            <goal>build</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <!--安裝了docker的主機，並且打開了api remote接口設置-->
                    <dockerHost>http://192.168.6.130:5678</dockerHost>
                    <pushImage>true</pushImage><!--設置上傳鏡像到私有倉庫，需要docker設置指定私有倉庫地址-->
                    <!--鏡像名稱-->
                    <imageName>${docker.repostory}/${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>
                    <!--鏡像的基礎版本-->
                    <baseImage>java:openjdk-8-jdk-alpine</baseImage>
                    <!--鏡像啟動參數-->
                    <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

3.2、application.yml

spring:
  application:
    name: microservice-config-server
security:
  basic:
    enabled: true
  user:
    name: jacky
    password: admin
server:
  port: 9511
eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://jacky:admin@localhost:9511/eureka

3.3、啟動類EurekaApplication.java

package com.jacky.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {

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

}

四、配置中心服務端（microservice-config-server）

4.1、pom.xml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">
    <parent>
        <artifactId>miroservice-config</artifactId>
        <groupId>com.jacky</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservice-config-server</artifactId>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
        <!--配置認證所需要的包-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <executions>
                    <!--設置在執行maven 的install時構建鏡像-->
                    <execution>
                        <id>build-image</id>
                        <phase>install</phase>
                        <goals>
                            <goal>build</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <!--安裝了docker的主機，並且打開了api remote接口設置-->
                    <dockerHost>http://192.168.6.130:5678</dockerHost>
                    <pushImage>true</pushImage><!--設置上傳鏡像到私有倉庫，需要docker設置指定私有倉庫地址-->
                    <!--鏡像名稱-->
                    <imageName>${docker.repostory}/${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>
                    <!--鏡像的基礎版本-->
                    <baseImage>java:openjdk-8-jdk-alpine</baseImage>
                    <!--鏡像啟動參數-->
                    <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

4.2、application.yml文件

server:
  port: 9518
eureka:
  instance:
    prefer-ip-address: true                   # 開啟健康檢查（需要spring-boot-starter-actuator依賴）
    lease-expiration-duration-in-seconds: 90  #續約到期時間(單位 S)默認是90S
    lease-renewal-interval-in-seconds: 30     # 續約更新時間間隔（默認30秒）
    instance-id: ${spring.application.name}:${spring.cloud.client.ipAddress}:${spring.application.instance_id:${server.port}}
  client:
    serviceUrl:
     defaultZone: http://jacky:admin@localhost:9511/eureka/ #把configservice注冊到eureka上，以便於客戶端通過eureka上注冊的信息找到configservice
#實現的基本的 HttpBasic 的認證
security:
  basic:
    enabled: true     # 開啟基於HTTP basic的認證
  user:
    name: jacky123      # 配置登錄的賬號
    password: admin123   # 配置登錄的密碼
#
spring:
  application:
    name: microservice-config-service
  cloud:
    config:
      server:
        git:
          uri: http://git.oschina.net/jacky-lulu/microservice-config-repo  #配置git倉庫位置
          clone-on-start: true #在啟動的時候克隆倉庫
          search-paths: '{application}' #配置倉庫路徑下的相對搜索位置，可以配置多個
          username: myuser   #填寫git倉庫的用戶名
          password: mypass   #填寫git倉庫的密碼
  rabbitmq:
    host: 192.168.6.130
    port: 5672
    username: myuser
    password: mypass

4.3、啟動類ConfigServerApplication.java

package com.jacky.cloud;

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

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

五、客戶端（microservice-config-client）

5.1、pom.xml配置文件

<?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">
    <parent>
        <artifactId>miroservice-config</artifactId>
        <groupId>com.jacky</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservice-config-client</artifactId>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </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.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</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-bus-amqp</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <executions>
                    <!--設置在執行maven 的install時構建鏡像-->
                    <execution>
                        <id>build-image</id>
                        <phase>install</phase>
                        <goals>
                            <goal>build</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <!--安裝了docker的主機，並且打開了api remote接口設置-->
                    <dockerHost>http://192.168.6.130:5678</dockerHost>
                    <pushImage>true</pushImage><!--設置上傳鏡像到私有倉庫，需要docker設置指定私有倉庫地址-->
                    <!--鏡像名稱-->
                    <imageName>${docker.repostory}/${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>
                    <!--鏡像的基礎版本-->
                    <baseImage>java:openjdk-8-jdk-alpine</baseImage>
                    <!--鏡像啟動參數-->
                    <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

5.2、application.yml文件

server:
  port: 8081

5.3、bootstrap.yml文件

spring:
  cloud:
    config:
      username: jacky123  #configservice認證的用戶名
      password: admin123   #認證密碼
      label: master   # 倉庫的分支節點
      discovery:
        enabled: true
        service-id: microservice-config-service
      profile: dev   #倉庫中對應文件的環境，如dev、prod、test等
      fail-fast: true
    bus:
      trace:
        enabled: true  #開啟消息跟蹤
  application:
    name: microservice-config-client
  rabbitmq:
    host: 192.168.6.130
    port: 5672
    username: myuser
    password: mypass
eureka:
  client:
    serviceUrl:
      defaultZone: http://jacky:admin@localhost:9511/eureka
  instance:
    prefer-ip-address: true
management:
  security:
    enabled: false    #刷新時關閉安全認證

注意：

上面這些屬性必須配置在bootstrap.yml，服務端的配置內容才能正確加載。因為通過bootstrap.yml的加載優先級比配置中心的服務端的高，服務端加載優先於application.yml，所以如果你把上面的配置寫在application.yml中，相當於默認不是從配置中心的服務端中讀取的配置信息，而是spring boot的默認加載。啟動的時候就會看到加載的配置，不是配置中心得配置內容，而是默認的本地的

5.4、啟動類（ConfigClientApplication.java）

package com.jacky.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

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

5.5、控制層類（ConfigClientController.java）

package com.jacky.cloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RefreshScope
@RestController
public class ConfigClientController {

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

  @GetMapping("/profile")
  public String getProfile() {
    return this.profile;
  }
}

六、在碼雲創建git項目，放置配置文件

地址：https://gitee.com/jacky-lulu/microservice-config-repo

七、測試

7.1、http://localhost:9511/

7.2、http://localhost:9518/microservice-config-client/dev

7.3、http://localhost:8081/profile

現在把碼雲上的配置文件 microservice-config-client-dev.yml 改為

profile : helleWordDevUpdate

然后發送post請求到配置中心服務端  http://localhost:9518/bus/refresh

再次訪問客戶端

 

 可以看到自動刷新成功

 


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