利用Spring Cloud Bus配置自动更新

本文主要是介绍利用Spring Cloud Bus配置自动更新，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一、官方简介

https://spring.io/projects/spring-cloud

【翻译】用于将服务和服务实例与分布式消息系统链接在一起的事件总线。在集群中传播状态更改很有用（例如配置更改事件）。

二、工作原理

三、配置自动更新原理

四、搭建基本环境

一个配置文件服务器
一个配置提供工程
一个注册中心eureka工程
一个消费者工程
一个提供者工程

说明：修改github服务器内容，POST请求actuator接口（例如 localhost:8084/actuator/bus-refresh），平滑更新修改过的文件。单点 kafka、单点zookeeper已经搭建基础上操作。

localhost:8084 ：对于配置文件服务器来说是客户端的ip:端口
/actuator/bus-refresh : bus-refresh 监控终端(bootstrap.yml配置)

五、配置文件服务器

这里使用github作为文件服务器,https://github.com/2014team/abcmsc-config-center

六、配置提供工程

（1）创建项目

创建一个spring boot工程

（2）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.abc</groupId><artifactId>00-configserver-9999</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><java.version>1.8</java.version><spring-cloud.version>Greenwich.SR1</spring-cloud.version></properties><dependencies><!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-config-server --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-config-server</artifactId><version>2.1.2.RELEASE</version></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>

（3）bootstrap.yml配置

在src/main/resources下bootstrap.yml文件配置如下

（4）启动类

七、注册中心eureka工程

（1）创建项目

创建一个spring boot工程

（2）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.abc</groupId><artifactId>06-config-eurekaserver</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><java.version>1.8</java.version><spring-cloud.version>Greenwich.SR1</spring-cloud.version></properties><dependencies><!--spring cloud config客户端依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-config</artifactId><version>2.1.2.RELEASE</version></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-netflix-eureka-server</artifactId></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>

（3）bootstrap.yml配置

在src/main/resources下bootstrap.yml文件配置如下

（4）启动类

八、消费者工程

（1）创建项目

（2）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.abc</groupId><artifactId>06-config-consumer-bus</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><java.version>1.8</java.version><spring-cloud.version>Greenwich.SR1</spring-cloud.version></properties><dependencies><!--spring cloud config客户端依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-config</artifactId></dependency><!--hystrix依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-hystrix</artifactId></dependency><!--feign依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><!--actuator依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--eureka客户端依赖--><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-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bus-kafka</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-actuator</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></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>

（3）bootstrap.yml配置

在src/main/resources下bootstrap.yml文件配置如下

（4）实体类

（5）RestTemplate

（6）控制层

（7）业务层

（8）启动类

九、提供者工程

（1）创建项目

（2）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.abc</groupId><artifactId>06-config-provider-bus</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><java.version>1.8</java.version><spring-cloud.version>Greenwich.SR1</spring-cloud.version></properties><dependencies><!--spring cloud config客户端依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-config</artifactId></dependency><!--actuator依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--eureka客户端依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><!--kafka依赖--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bus-kafka</artifactId></dependency><!--actuator依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-actuator</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.10</version></dependency><!--修改MySQL驱动版本--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.47</version><scope>runtime</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></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>

（3）bootstrap.yml配置

在src/main/resources下bootstrap.yml文件配置如下