SpringCloud 2.x学习笔记：6、高可用的分布式配置中心（Greenwich版本）

程裕强

发布于 2019-07-02 10:52:19

4450

发布于 2019-07-02 10:52:19

1、复用服务注册中心

参考https://cloud.tencent.com/developer/article/1454228

spring.application.name=register-server
server.port=8800
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.serviceUrl.defaultZone=http://localhost:8800/eureka/

2、改造config-server

2.1 pom.xml

添加

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

完整的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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.cntaiping.tpa</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>com.cntaiping.tpa</groupId>
        <artifactId>config</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
    </dependencies>

</project>

2.2 application.yml

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8800/eureka/
spring:
  profiles:
    active: jdbc
  application:
    name: config-server
  datasource:
    url: jdbc:mysql://10.17.12.160:3306/config?useUnicode=true&characterEncoding=utf8&characterSetResults=utf8&serverTimezone=GMT%2B8
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
  cloud:
    config:
      label: master
      server:
        jdbc: true
server:
  port: 8300
spring.cloud.config.server.jdbc.sql: SELECT key1, value1 from config_properties where APPLICATION=? and PROFILE=? and LABEL=?

2.3 Application启动类

添加@EnableEurekaClient

package com.cntaiping.tpa.configserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableConfigServer
@EnableEurekaClient
public class ConfigServerApplication {

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

}

2.4 启动两个实例

3、改造config-client

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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.cntaiping.tpa</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>com.cntaiping.tpa</groupId>
        <artifactId>config</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
      
    </dependencies>

</project>

3.2 bootstrap.properties

spring.application.name=config-client
eureka.client.serviceUrl.defaultZone=http://localhost:8800/eureka/
spring.profiles.active=dev
#spring.cloud.config.uri= http://localhost:8300/
spring.cloud.config.fail-fast=true
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.serviceId=config-server
server.port=8083

3.3 Application类

package com.cntaiping.tpa.configclient;

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

@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class ConfigClientApplication {

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

}