sentinel使用(结合gateway)

前

如果你想在Spring Cloud Gateway中使用Sentinel Starter，你需要添加Spring - Cloud -alibaba- Sentinel - Gateway依赖，并添加Spring - Cloud - Starter - Gateway依赖，让Spring Cloud Gateway自动配置类在模块中生效

帮助文档: https://github.com/alibaba/spring-cloud-alibaba/wiki/Sentinel#spring-cloud-gateway-支持

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
</dependency>

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

搭建环境

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wzq.example</groupId>
    <artifactId>cloud_sentine_gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud_sentine_gateway</name>
    <description>Demo project for Spring Boot</description>


    <properties>
        <java.version>1.8</java.version>
        <spring.cloud.version>Hoxton.SR8</spring.cloud.version>
        <spring.cloud.alibaba.version>2.2.5.RELEASE</spring.cloud.alibaba.version>
        <spring.boot.version>2.2.5.RELEASE</spring.boot.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring.cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring.cloud.alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>

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

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

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
        </dependency>

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

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

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

注意:spring的版本需要一致

重点jar: spring-cloud-starter-alibaba-nacos-discovery , spring-cloud-alibaba-sentinel-gateway , spring-cloud-starter-gateway

application.yml

server:
  port: 8085
spring:
  application:
    name: cloud-sentine-gateway
  cloud:
    sentinel:
      eager: true # 提前触发初始化
      transport:
        port: 8719
        dashboard: 192.168.60.129:8080
    nacos:
      discovery:
        server-addr: 192.168.60.129:8848
    gateway:
      routes:
#        - id: service-provider
#          uri: lb://service-provider
#          predicates:
#            # 匹配所有hello开头的接口 也可以是 context-path 名称
#            - Path=/hello/**
        - id: cloud-sentine-open-feign-provider
          uri: lb://cloud-sentine-open-feign-provider
          predicates:
            - Path=/hello/**
management:
  endpoints:
    web:
      exposure:
        include: "*"

CloudSentineGatewayApplication.java

package com.wzq.example.cloud_sentine_gateway;

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

@EnableDiscoveryClient
@SpringBootApplication
public class CloudSentineGatewayApplication {

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

}

测试

在控制台中添加 cloud-sentine-gateway 的限流规则

访问接口要是出现:限流成功

{
    "code": 429,
    "message": "Blocked by Sentinel: FlowException"
}