Spring Cloud 簡單入門教程 之 集羣config （十）

微服務架構中服務有很多，如果每個服務都要從配置中心獲取配置信息，無疑，配置中心的壓力會非常大，因此，可以將配置中心集羣化。
構建一個Spring Boot項目，取名eureka-server，添加依賴：

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

完整pom文件如下：

<?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.heyuanjun.eureka-server</groupId>
	<artifactId>eureka-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka-server</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.8.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>Camden.SR7</spring-cloud.version>
	</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-test</artifactId>
			<scope>test</scope>
		</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>${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>
		</repository>

		<repository>
			<id>repository.springframework.maven.snapshot</id>
			<name>Spring Framework Maven Snapshot Repository</name>
			<url>http://repo.spring.io/snapshot/</url>
		</repository>
	</repositories>

</project>

啓動類添加註解@EnableEurekaServer，配置文件作如下配置：

server:
  port: 8889

eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

改造config-server項目，添加依賴：

<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>

配置文件完整配置如下：

spring.application.name=config-server
server.port=8888

#git倉庫地址
spring.cloud.config.server.git.uri=https://github.com/dh1027/SpringcloudConfig
#配置倉庫路徑
spring.cloud.config.server.git.searchPaths=respo
#配置倉庫的分支
spring.cloud.config.label=master
#訪問git倉庫的用戶名（公開倉庫不需要用戶名密碼）
spring.cloud.config.server.git.username=
#訪問git倉庫的用戶密碼
spring.cloud.config.server.git.password=

eureka.client.serviceUrl.defaultZone=http://localhost:8889/eureka/

同樣，改造config-client文件。
添加依賴

<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>

配置文件作如下配置：

spring.application.name=config-client
spring.cloud.config.label=master
spring.cloud.config.profile=dev
#spring.cloud.config.uri= http://localhost:8888/
server.port=8881
management.security.enabled=false #是從配置中心讀取文件。

eureka.client.serviceUrl.defaultZone=http://localhost:8889/eureka/
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.serviceId=config-server #配置中心的servieId，即服務名

啓動eureka-servr,啓動config-server,啓動config-client
瀏覽器訪問http://localhost:8889/

有兩個服務註冊到了服務註冊中心。
瀏覽器訪問：http://localhost:8881/hi

獲取到類配置信息，集羣可用。

各種IT書籍書目及下載鏈接
https://blog.csdn.net/dh1027/article/details/89327978