SpringCloud怎么使用Nacos做注册中心+配置中心（）

犀渠玉剑良家子，白马金羁侠少年。这篇文章主要讲述SpringCloud怎么使用Nacos做注册中心+配置中心？相关的知识，希望能为你提供帮助。
【SpringCloud怎么使用Nacos做注册中心+配置中心（）】Nacos是阿里生态下, 用于微服务注册与发现、配置管理实时刷新的微服务平台. 默认使用嵌入式持久化, 可支持mysql数据库持久化
安装Nacos服务1.下载nacos服务版本 1.3.2 Windows下下载zip包并解压
2.可使用默认方式持久化, 跳过此步骤. 如果使用mysql, 需要创建数据库nacos, 执行conf/nacos-mysql.sql, 并修改application.properties, 配置MySQL连接信息

### If use MySQL as datasource:
spring.datasource.platform=mysql

### Count of DB:
db.num=1

### Connect URL of DB:
db.url.0=jdbc:mysql://127.0.0.1:3306/nacos?characterEncoding=utf8& connectTimeout=1000& socketTimeout=3000& autoReconnect=true& useUnicode=true& useSSL=false& serverTimezone=UTC
db.user=root
db.password=root

3.双击bin/startup.cmd, 启动nacos, 如果是单节点启动, 需要修改startup.cmd, 否则会报错
4.访问地址 ??http://localhost:8848/nacos/index.html?? username: nacos password: nacos

set MODE="standalone" // 默认为cluster
set FUNCTION_MODE="all"
set SERVER=nacos-server
set MODE_INDEX=-1
set FUNCTION_MODE_INDEX=-1
set SERVER_INDEX=-1
set EMBEDDED_STORAGE_INDEX=-1
set EMBEDDED_STORAGE=""

调整provider1.调整pom.xml

< dependencies>
< dependency>
< groupId> org.springframework.boot< /groupId>
< artifactId> spring-boot-starter-web< /artifactId>
< /dependency>

< !-- 如果使用配置中心, 需要依赖此jar -->
< dependency>
< groupId> com.alibaba.cloud< /groupId>
< artifactId> spring-cloud-starter-alibaba-nacos-config< /artifactId>
< version> 2.1.1.RELEASE< /version>
< /dependency>

< dependency>
< groupId> com.alibaba.cloud< /groupId>
< artifactId> spring-cloud-starter-alibaba-nacos-discovery< /artifactId>
< version> 2.1.1.RELEASE< /version>
< /dependency>
< /dependencies>

2.配置bootstrap.yml, 注意名称一定要是bootstrap

server:
port: 8079

spring:
application:
name: provider

cloud:
nacos:
config:
enable: true
server-addr: localhost:8848
discovery:
enabled: true
server-addr: localhost:8848

3.设置Applicaiton

@SpringBootApplication
public class ProviderApplication {

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

}

4.添加controller

@RestController
public class IndexController {
@GetMapping("/index")
private String index() {
return "success";
}
}

调整consumer1.调整pom.xml

< dependencies>
< dependency>
< groupId> org.springframework.boot< /groupId>
< artifactId> spring-boot-starter-web< /artifactId>
< /dependency>

< dependency>
< groupId> org.springframework.cloud< /groupId>
< artifactId> spring-cloud-starter-openfeign< /artifactId>
< /dependency>

< dependency>
< groupId> com.alibaba.cloud< /groupId>
< artifactId> spring-cloud-starter-alibaba-nacos-config< /artifactId>
< version> 2.1.1.RELEASE< /version>
< /dependency>

< dependency>
< groupId> com.alibaba.cloud< /groupId>
< artifactId> spring-cloud-starter-alibaba-nacos-discovery< /artifactId>
< version> 2.1.1.RELEASE< /version>
< /dependency>

< /dependencies>

2.配置bootstrap.yml, 注意名称一定要是bootstrap

server:
port: 8081

spring:
application:
name: consumer

cloud:
nacos:
config:
server-addr: localhost:8848
file-extension: yaml# 此处为配置使用的后缀名
discovery:
server-addr: localhost:8848

3.设置Applicaiton

@EnableFeignClients
@SpringBootApplication
public class ConsumerApplication {

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

4.添加FeginClient

@FeignClient(name = "provider")
public interface ProviderFeignClient {

@GetMapping("/index")
String index();

}

5.添加配置映射

@Component
@RefreshScope // 添加此注解表示会实时更新value 另外需要给属性添加get set方法
public class NacosConfig {
@Value("${is_test:true}") // 此处true为默认值
private boolean isTest;
public boolean isTest() { return isTest; }
public void setIsTest(boolean isTest) { this.isTest = isTest; }
}

6.添加controller, controller处不能添加@RefreshScope注解, 否则使用@Value获取不到配置信息

@RestController
public class IndexController {
@Autowired
private NacosConfig config;
@Autowired
private ProviderFeignClient providerFeignClient;
@GetMapping("/index")
private String index() {
return config.isTest() + "--" + providerFeignClient.index();
}
}

7.nacos管理后台添加配置信息配置管理-> 配置列表-> 右侧"+", 注意Data ID格式

${prefix}-${spring.profiles.active}.${file-extension}

文章图片

8.启动provider, consumer, 可在nacos管理平台查看服务状态

文章图片

9.consumer启动关键日志, consumer已获取到配置信息

2020-10-25 09:47:22.928WARN 4032 --- [main] c.a.c.n.c.NacosPropertySourceBuilder: Ignore the empty nacos configuration and get it based on dataId[consumer] & group[DEFAULT_GROUP]
2020-10-25 09:47:22.942INFO 4032 --- [main] c.a.c.n.c.NacosPropertySourceBuilder: Loading nacos data, dataId: \'consumer.yaml\', group: \'DEFAULT_GROUP\', data: is_test: false
2020-10-25 09:47:22.949INFO 4032 --- [main] b.c.PropertySourceBootstrapConfiguration : Located property source: CompositePropertySource {name=\'NACOS\', propertySources=[NacosPropertySource {name=\'consumer.yaml\'}, NacosPropertySource {name=\'consumer\'}]}
2020-10-25 09:47:22.954INFO 4032 --- [main] c.c.demo.consumer.ConsumerApplication: No active profile set, falling back to default profiles: default

10.访问??http://localhost:8081/index??, 如果将配置删除, 找不到is_test, 会变为默认值true. 测试