Spring Cloud Config 简介

什么是Srping Cloud Config?

###本文示例说明###

  • 为了更直观的理解spring cloud config,本文通过server获取整个配置,效果上与通过配置springboot的active 来切换环境一致;通过接口查询数据库以查看效果;
  • 采用高可用架构;此处使用eureka去做服务注册发现(暂时也只会这个。。),eureka配置说明可以查看springCloud之eureka

新建ConfigServer

为了减少文章长度,尽量干货,创建过程就不截说明了,建议使用Intellij idea进行创建;

  • 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.lc.springcloud</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>2.1.0.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>
		<spring-cloud.version>Greenwich.M2</spring-cloud.version>
	</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-netflix-eureka-client</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>${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>

	<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>
  • application.yml配置如
server:
	port: 8100
spring:
	application:
		name: config-server
	cloud:
    	config:
			server:
        		git:
          		 uri: https://github.com/lvchaogit/SpringCloud
eureka:
   client:
    service-url:
      defaultZone: http://localhost:8081/eureka/ # 服务注册中心地址

通过配置不难理解,该配置是从git上获取配置,更多配置后续详解;

  • application.java
@SpringBootApplication
@EnableConfigServer
@EnableDiscoveryClient
public class ConfigServerApplication {

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

主要是加上**@EnableConfigServer**注解,开启configserver功能

搭建 Config Client

  • 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.lc.springcloud</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>2.1.0.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>
		<spring-cloud.version>Greenwich.M2</spring-cloud.version>
	</properties>

	<dependencies>
		<!-- config starter begin-->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</artifactId>
		</dependency>
		<!-- config starter end-->
		<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>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-pool2</artifactId>
			<version>2.5.0</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.10</version>
		</dependency>
		<!-- mybatis-plus begin -->
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-boot-starter</artifactId>
			<version>2.1.9</version>
			<exclusions>
				<exclusion>
					<artifactId>tomcat-jdbc</artifactId>
					<groupId>org.apache.tomcat</groupId>
				</exclusion>
			</exclusions>
		</dependency>
		<!--config监控模块  -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.13</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</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>

	<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>
  • bootstrap.yml
spring:
  application:
    name: config-client
  cloud:
    config:
      profile: dev
      label: master
      discovery:
        enabled: true
        service-id: config-server
server:
  port: 2001
eureka:
  client:
      register-with-eureka: false     #因此处只是消费,不提供服务,所以不需要向eureka server注册
      service-url:
        defaultZone: http://localhost:8081/eureka/ # 服务注册中心地址
  • 首先注意配置文件名称为:bootstartp.yml,并不是~~application.yml~~
  • 通过配置discovery,并设置enabled为true,使client通过服务发现去获取server,server-id为注册中心里配置的服务名称
  • label=git的标签;profile=配置文件版本(类似于spring boot中的active)

###常用configserver配置#######采用URI占位符####

spring:
  cloud:
    config:
      server:
        git:
          uri: https://github.com/lvchaogit/{application}
  • 使用{application} 和 {profile}(如果使用{label},请记住它是使用在git标签中的)。因此你可以轻松的支持“一个应用一个仓库”的原则

####模式匹配和多仓库####

spring:
  cloud:
    config:
      server:
        git:
          uri: https://github.com/lvchaogit/SpringCloud
          repos:
            simple: https://github.com/simple/config-repo
            special:
              pattern: special*/dev*,*special*/dev*
              uri: https://github.com/special/config-repo
            local:
              pattern: local*
              uri: file:/home/configsvc/config-repo
  • 在{application}和{profile}参数中使用模式匹配可以支持更多复杂的需求。模式的格式是一组逗号分隔的{application}/{profile},其中的参数可以使用通配符.
  • 如果{application}/{profile}没有匹配到任何模式,它将使用默认的仓库地址:spring.cloud.config.server.git.uri。上面的例子中,"simple"仓库匹配的是“simple/”(它仅仅匹配一个仓库simple,在所有的环境下)。"local"仓库将匹配所有{application}的名字以“local”开头的,并且也是在所有的环境下。“/”前缀自动添加到所有没有设置{profile}的模式中。

####匹配仓库子目录####

spring:
  cloud:
    config:
      server:
        git:
          uri: https://github.com/spring-cloud-samples/config-repo
          searchPaths: foo,bar*
  • 在foo和以bar开头的目录中,搜索配置文件。

####克隆远程的仓库####

spring:
  cloud:
    config:
      server:
        git:
          uri: https://git/common/config-repo.git
          repos:
            team-a:
                pattern: team-a-*
                cloneOnStart: true
                uri: http://git/team-a/config-repo.git
            team-b:
                pattern: team-b-*
                cloneOnStart: false
                uri: http://git/team-b/config-repo.git
            team-c:
                pattern: team-c-*
                uri: http://git/team-a/config-repo.git
  • 服务器默认在第一次请求配置文件时克隆远程的仓库,也可以配置在启动的时候克隆仓库
  • team-a的仓库将在服务端启动时进行克隆,其他的仓库将在第一次请求时克隆。

####仓库认证####

spring:
  cloud:
    config:
      server:
        git:
          uri: https://github.com/spring-cloud-samples/config-repo
          username: trolley
          password: strongpassword
  • 输入用户名密码

常用配置参考:configServer常用配置

文中示例代码:SpringCloudConfig 示例

11-27 21:13