Spring Cloud (6) 分布式配置中心-高可用
高可用
现在已经可以从配置中心读取配置文件了,当微服务很多时都从配置中心读取配置文件,这时可以将配置中心做成一个微服务,将其集群化,从而达到高可用。
改造config-server 加入eureka
<?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.david</groupId> <artifactId>configserver</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>configserver</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.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-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-config-server</artifactId> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Edgware.SR2</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>
并在application.yml中制定服务注册地址:
spring:
application:
name: david-config-server
cloud:
config:
server:
git:
uri: https://gitee.com/baidawei/SpringCloudConfig.git
search-paths: repo
username: 853020304@qq.com
password: 1z48489w8a
server:
port: 8888
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/
在启动类中增加@EnableDiscoveryClient注解,将config-server注册到eureka
@EnableDiscoveryClient @EnableConfigServer @SpringBootApplication public class ConfigserverApplication { public static void main(String[] args) { SpringApplication.run(ConfigserverApplication.class, args); } }
启动eureka、config-server
改造config-client
将其注册到服务注册中心,作为eureka客户端,需要在pom文件加上eureka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.david</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>1.5.9.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.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Edgware.SR2</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>
配置文件bootstrap.yml,加上服务注册中心地址:
spring: application: name: david-config-client #对应{application}位置 cloud: config: #uri: http://localhost:8888/ #配置中心网址 profile: dev #对应{profile}位置 dev等 label: master #对应{label}位置 分支 discovery: enabled: true #从配置中心读取文件 service-id: david-config-server #配置中心的服务名 server: port: 8881 eureka: client: service-url: defaultZone: http://localhost:8761/eureka/
启动类 增加注解,用来发现config-server服务,利用其来加载应用配置
@EnableDiscoveryClient @SpringBootApplication public class ConfigClientApplication { public static void main(String[] args) { SpringApplication.run(ConfigClientApplication.class, args); } }
启动config-client
http://localhost:8881/test 输出dev