sentinel 规则持久化到nacos

问题描述

Sentinel Dashboard中添加的规则是存储在内存中的，只要项目一重启规则就丢失了

此处将规则持久化到nacos中，在nacos中添加规则，然后同步到dashboard中；

后面研究如果将dashboard中添加的规则自动添加到nacos中

官网教程地址：https://github.com/alibaba/spring-cloud-alibaba/wiki/Sentinel

实现过程

1.导入依赖包

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/>
    </parent>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>0.9.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
            <version>1.5.2</version>
        </dependency>
    </dependencies>

2.在application.properties中配置sentinel-nacos信息

spring.application.name=mz
server.port=8003

# sentinel dashboard
spring.cloud.sentinel.transport.dashboard=localhost:8080

spring.cloud.sentinel.datasource.ds1.nacos.server-addr=localhost:8848
spring.cloud.sentinel.datasource.ds1.nacos.data-id=mz-sentinel
spring.cloud.sentinel.datasource.ds1.nacos.group-id=DEFAULT_GROUP
spring.cloud.sentinel.datasource.ds1.nacos.data-type=json
spring.cloud.sentinel.datasource.ds1.nacos.rule-type=flow

3.在nacos中添加规则

[
    {
        "resource": "/hello",
        "limitApp": "default",
        "grade": 1,
        "count": 5,
        "strategy": 0,
        "controlBehavior": 0,
        "clusterMode": false
    }
]

4.创建测试类

@RestController
public class Test {

    @GetMapping("/hello")
    public String hello() {
        return "hello sentinel";
    }
}

访问几次接口之后，就可以在Sentinel Dashboard 中看到在nacos中配置的规则信息了，并且项目服务重启依然存在

本文参考：http://blog.didispace.com/spring-cloud-alibaba-sentinel-2-1/