之前的教程

springboot-alibabacloud-sentinel-安装运行（控制台运行）-01
https://www.jianshu.com/p/dcf4f875def2
springboot-alibabacloud-sentinel-使用-02
https://www.jianshu.com/p/17557bec9c31
springboot-alibabacloud-sentinel-自定义返回-03
https://www.jianshu.com/p/82917e7e996e

之前的配置每次服务重启配置都会消失，那么怎么让配置持久化呢？setinel提供了多种方案！这里我们介绍和nacos结合实现配置持久化。

引入pom

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.ethan</groupId>
            <artifactId>aliclound-comm</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- 关键-->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>
        <!-- 关键-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

bootstrap.properties配置

spring.application.name=product-services
server.port=8084
spring.profiles.active=dev
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
spring.cloud.nacos.config.prefix=product-services
spring.cloud.nacos.config.namespace=dev
spring.cloud.nacos.config.group=aliclound

spring.cloud.sentinel.transport.dashboard=localhost:8080
spring.cloud.sentinel.datasource.ds2.nacos.server-addr=localhost:8848
#记住这里在配置nacos的时候dataid也写这个不要写后缀
spring.cloud.sentinel.datasource.ds2.nacos.data-id=sentinel
spring.cloud.sentinel.datasource.ds2.nacos.namespace=dev
spring.cloud.sentinel.datasource.ds2.nacos.group-id=aliclound
spring.cloud.sentinel.datasource.ds2.nacos.data-type=json
spring.cloud.sentinel.datasource.ds2.nacos.rule-type=flow

参数含义

image.png

nacos配置

image.png

看dataid的文件没有后缀

controller

随便写一个即可

@RestController
@RequestMapping("/product-services/product")
@Slf4j
@RefreshScope
public class ProductController {
    @Value("${user.name:123}")
    private String name;
    @Value("${user.pwd:123}")
    private String pwd;

    @GetMapping("user_value")
    public String getUserValue() {
         int i = 10;
         int b =  i/0;
        log.info("name:"+name+" pwd:"+pwd);
        return "name:"+name+" pwd:"+pwd;
    }
}

效果

通过测试效果可以得出，在nacos配置修改配置会同步到sentinel但是在sentinel中修改了配置不会同步到nacos配置只能在nacos里面修改，不然数据无法实现一致性。下一个教程我们解决这个问题。