Java17 --- SpringCloud之Sentinel

发布于：2024-05-19 ⋅ 阅读:(109) ⋅ 点赞:(0)

目录

一、Sentinel下载并运行

二、创建8401微服务整合Sentinel

三、流控规则 

3.1、直接模式 

3.2、关联模式

3.3、链路模式 

3.3.1、修改8401代码 

 3.3.2、创建流控模式

3.4、Warm UP（预热） ​编辑

3.5、排队等待

四、熔断规则

4.1、慢调用比例 

4.2、异常比例 

4.3、异常数

 五、@SentinelResource注解

5.1、按照rest地址限流+默认限流返回 ​编辑

5.2、按SentinelResource资源名称限流+自定义限流返回

5.3、按SentinelResource资源名称限流+自定义限流返回+服务降级处理

六、热点规则 

6.1、参数例外项 

七、授权规则 ​编辑

八、规则持久化

九、整合Openfeign

十、整合Gateway 

一、Sentinel下载并运行

运行命令：java -jar sentinel-dashboard-1.8.7.jar

访问界面：

二、创建8401微服务整合Sentinel

导入相关pom及yml文件配置

<dependencies>
        <!--SpringCloud alibaba sentinel -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <!--nacos-discovery-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- 引入自己定义的api通用包 -->
        <dependency>
            <groupId>com.cjc.cloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!--SpringBoot通用依赖模块-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.28</version>
            <scope>provided</scope>
        </dependency>
        <!--test-->
        <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>
server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848         #Nacos服务注册中心地址
    sentinel:
      transport:
        dashboard: localhost:8080 #配置Sentinel dashboard控制台服务地址
        port: 8719 #默认8719端口，假如被占用会自动从8719开始依次+1扫描,直至找到未被占用的端口

测试代码：

@SpringBootApplication
@EnableDiscoveryClient
public class Main8401 {
    public static void main(String[] args) {
        SpringApplication.run(Main8401.class,args);
    }
}
@RestController
public class FlowLimitController {
    @GetMapping("/testA")
    public String testA()
    {
        return "------testA";
    }

    @GetMapping("/testB")
    public String testB()
    {
        return "------testB";
    }
}

三、流控规则 

3.1、直接模式 

 默认使用

3.2、关联模式

3.3、链路模式 

3.3.1、修改8401代码 

sentinel:
      transport:
        dashboard: localhost:8080 #配置Sentinel dashboard控制台服务地址
        port: 8719 #默认8719端口，假如被占用会自动从8719开始依次+1扫描,直至找到未被占用的端口
      web-context-unify: false # controller层的方法对service层调用不认为是同一个根链路
@Service
public class FlowLimitService {
    @SentinelResource(value = "common")
    public void common()
    {
        System.out.println("------FlowLimitService come in");
    }
}

@Autowired
    private FlowLimitService flowLimitService;
    @GetMapping("/testC")
    public String testC()
    {
        flowLimitService.common();
        return "------testC";
    }

    @GetMapping("/testD")
    public String testD()
    {
        flowLimitService.common();
        return "------testD";
    }

 3.3.2、创建流控模式

3.4、Warm UP（预热） 

3.5、排队等待

 

四、熔断规则

4.1、慢调用比例 

 

进行压测：

 

4.2、异常比例 

  

4.3、异常数

 

 五、@SentinelResource注解

 SentinelResource是一个流量防卫防护组件注解， 哨兵资源是一个流量防卫防护组件注解，用于指定防护资源，对配置的资源进行流量控制、熔断降级等功能。

5.1、按照rest地址限流+默认限流返回 

测试访问：

 

5.2、按SentinelResource资源名称限流+自定义限流返回

测试代码：

@GetMapping("/rateLimit/byResource")
    @SentinelResource(value = "byResourceSentinelResource",blockHandler = "handleException")
    public String byResource()
    {
        return "按资源名称SentinelResource限流测试OK";
    }
    public String handleException(BlockException exception)
    {
        return "服务不可用@SentinelResource启动"+"\t"+"o(╥﹏╥)o";
    }

 

测试访问：

 

5.3、按SentinelResource资源名称限流+自定义限流返回+服务降级处理

 @GetMapping("/rateLimit/doAction/{p1}")
    @SentinelResource(value = "doActionSentinelResource",
            blockHandler = "doActionBlockHandler", fallback = "doActionFallback")
    public String doAction(@PathVariable("p1") Integer p1) {
        if (p1 == 0){
            throw new RuntimeException("p1等于零直接异常");
        }
        return "doAction";
    }

    public String doActionBlockHandler(@PathVariable("p1") Integer p1,BlockException e){
        log.error("sentinel配置自定义限流了:{}", e);
        return "sentinel配置自定义限流了";
    }

    public String doActionFallback(@PathVariable("p1") Integer p1,Throwable e){
        log.error("程序逻辑异常了:{}", e);
        return "程序逻辑异常了"+"\t"+e.getMessage();
    }

 

测试结果：

 

六、热点规则 

@GetMapping("/testHotKey")
    @SentinelResource(value = "testHotKey",blockHandler = "dealHandler_testHotKey")
    public String testHotKey(@RequestParam(value = "p1",required = false) String p1,

                             @RequestParam(value = "p2",required = false) String p2){
        return "------testHotKey";
    }
    public String dealHandler_testHotKey(String p1,String p2,BlockException exception)
    {
        return "-----dealHandler_testHotKey";
    }

 

测试结果：

 

6.1、参数例外项 

 

七、授权规则 

测试访问：

 

八、规则持久化

添加pom依赖

<!--SpringCloud ailibaba sentinel-datasource-nacos -->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>

 修改yml

spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848         #Nacos服务注册中心地址
    sentinel:
      transport:
        dashboard: localhost:8080 #配置Sentinel dashboard控制台服务地址
        port: 8719 #默认8719端口，假如被占用会自动从8719开始依次+1扫描,直至找到未被占用的端口
      web-context-unify: false # controller层的方法对service层调用不认为是同一个根链路
      datasource:
        ds1:
          nacos:
            server-addr: localhost:8848
            dataId: ${spring.application.name}
            groupId: DEFAULT_GROUP
            data-type: json
            rule-type: flow # com.alibaba.cloud.sentinel.datasource.RuleType

在nacos服务配置中进行配置

 

测试：

 

九、整合Openfeign

修该9001服务提供者pom及yml

 <!--openfeign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--alibaba-sentinel-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
spring:
  application:
    name: nacos-payment-provider
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848 #配置Nacos地址
    sentinel:
      transport:
        dashboard: localhost:8080 #配置Sentinel dashboard控制台服务地址
        port: 8719 #默认8719端口，假如被占用会自动从8719开始依次+1扫描,直至找到未被占用的端口

测试代码：

 @GetMapping("/pay/nacos/get/{orderNo}")
    @SentinelResource(value = "getPayByOrderNo",blockHandler = "handlerBlockHandler")
    public ResultData getPayByOrderNo(@PathVariable("orderNo") String orderNo)
    {
        //模拟从数据库查询出数据并赋值给DTO
        PayDTO payDTO = new PayDTO();

        payDTO.setId(1024);
        payDTO.setOrderNo(orderNo);
        payDTO.setAmount(BigDecimal.valueOf(9.9));
        payDTO.setPayNo("pay:"+ IdUtil.fastUUID());
        payDTO.setUserId(1);

        return ResultData.success("查询返回值："+payDTO);
    }
    public ResultData handlerBlockHandler(@PathVariable("orderNo") String orderNo, BlockException exception)
    {
        return ResultData.fail(ReturnCodeEnum.RC500.getCode(),"getPayByOrderNo服务不可用，" +
                "触发sentinel流控配置规则"+"\t"+"o(╥﹏╥)o");
    }

 远程调用测试代码：

@FeignClient(value = "nacos-payment-provider",fallback = PayFeignSentinelApiFallBack.class)
public interface PayFeignSentinelApi {
    @GetMapping("/pay/nacos/get/{orderNo}")
    public ResultData getPayByOrderNo(@PathVariable("orderNo") String orderNo);
}
@Component
public class PayFeignSentinelApiFallBack implements PayFeignSentinelApi{
    @Override
    public ResultData getPayByOrderNo(String orderNo) {
        return ResultData.fail(ReturnCodeEnum.RC500.getCode(),"对方服务宕机或不可用，FallBack服务降级o(╥﹏╥)o");
    }
}

修改80消费者yml

# 激活Sentinel对Feign的支持
feign:
  sentinel:
    enabled: true
@Resource
    private PayFeignSentinelApi payFeignSentinelApi;
    @GetMapping(value = "/consumer/pay/nacos/get/{orderNo}")
    public ResultData getPayByOrderNo(@PathVariable("orderNo") String orderNo)
    {
        return payFeignSentinelApi.getPayByOrderNo(orderNo);
    }
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class NFMain80 {
    public static void main(String[] args) {
        SpringApplication.run(NFMain80.class,args);
    }
}

启动80服务报错

 

修改springcloud版本，也可以下调springboot版本

 

测试结果：

 

 

十、整合Gateway 

 新建9528微服务并导入相关pom与yml

<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-transport-simple-http</artifactId>
            <version>1.8.6</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-spring-cloud-gateway-adapter</artifactId>
            <version>1.8.6</version>
        </dependency>
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
            <version>1.3.2</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
server:
  port: 9528

spring:
  application:
    name: cloudalibaba-sentinel-gateway     # sentinel+gataway整合Case
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    gateway:
      routes:
        - id: pay_routh1 #pay_routh1                #路由的ID(类似mysql主键ID)，没有固定规则但要求唯一，建议配合服务名
          uri: http://localhost:9001                #匹配后提供服务的路由地址
          predicates:
            - Path=/pay/**                      # 断言，路径相匹配的进行路由

测试代码：

@SpringBootApplication
@EnableDiscoveryClient
public class Main9528 {
    public static void main(String[] args) {
        SpringApplication.run(Main9528.class,args);
    }
}
@Configuration
public class GatewayConfiguration {
    private final List<ViewResolver> viewResolvers;
    private final ServerCodecConfigurer serverCodecConfigurer;

    public GatewayConfiguration(ObjectProvider<List<ViewResolver>> viewResolversProvider, ServerCodecConfigurer serverCodecConfigurer)
    {
        this.viewResolvers = viewResolversProvider.getIfAvailable(Collections::emptyList);
        this.serverCodecConfigurer = serverCodecConfigurer;
    }
    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public SentinelGatewayBlockExceptionHandler sentinelGatewayBlockExceptionHandler() {
        // Register the block exception handler for Spring Cloud Gateway.
        return new SentinelGatewayBlockExceptionHandler(viewResolvers, serverCodecConfigurer);
    }

    @Bean
    @Order(-1)
    public GlobalFilter sentinelGatewayFilter() {
        return new SentinelGatewayFilter();
    }

    @PostConstruct //javax.annotation.PostConstruct
    public void doInit() {
        initBlockHandler();
    }


    //处理/自定义返回的例外信息
    private void initBlockHandler() {
        Set<GatewayFlowRule> rules = new HashSet<>();
        rules.add(new GatewayFlowRule("pay_routh1").setCount(2).setIntervalSec(1));

        GatewayRuleManager.loadRules(rules);
        BlockRequestHandler handler = new BlockRequestHandler() {
            @Override
            public Mono<ServerResponse> handleRequest(ServerWebExchange exchange, Throwable t) {
                Map<String,String> map = new HashMap<>();

                map.put("errorCode", HttpStatus.TOO_MANY_REQUESTS.getReasonPhrase());
                map.put("errorMessage", "请求太过频繁，系统忙不过来，触发限流(sentinel+gataway整合Case)");

                return ServerResponse.status(HttpStatus.TOO_MANY_REQUESTS)
                        .contentType(MediaType.APPLICATION_JSON)
                        .body(BodyInserters.fromValue(map));
            }
        };
        GatewayCallbackManager.setBlockHandler(handler);
    }
}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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