2020-03-28 sentinel 阿里巴巴断路器

一、

 

 

 二、sentinel跟hystrix的区别

 

 三、

1、

 2、名词解释

 四、

 下载链接：https://github.com/alibaba/Sentinel/releases/download/1.6.3/sentinel-dashboard-1.6.3.jar

启动命令：java -Dserver.port=8080 -Dcsp.sentinel.dashboard.server=localhost:8080 -Dproject.name=sentinel-dashboard -jar sentinel-dashboard-1.6.3.jar

localhost:8080 进入登录界面。

2、将所有的服务交给控制台管理

　依赖配置

<?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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ljtao3</groupId>
    <artifactId>consumer-sentinel-feign</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>consumer-sentinel-feign</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>


        <!-- spring cloud 整合feign -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            <version>0.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>


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

    <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>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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

</project>

a、客户端介入sentinel管理控制台，

　　b、在客户端（需要管理微服务上）引入坐标。

　　c、在客户端配置启动参数。

server:
  port: 9103

spring:
  application:
    name: CONSUMER-SENTINEL-FEIGN
  cloud:
    sentinel:
      transport:
        dashboard: localhost:8080 #sentinel控制台的请求地址
      eager: true #取消控制台懒加载

eureka:
  instance:
    prefer-ip-address: true #注册服务的时候使用服务的ip地址 学习：https://study.163.com/course/courseMain.htm?courseId=1209401930
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/

#在feign中开启对sentinel的支持
feign:
  sentinel:
    enable: true #添加sentinel对feign的支持

六、针对rest Template的支持

1、代码实现

 

 sentinel控制台上对接口进行监控设置

 2、统一对restTemplate进行配置

七、针对feign的支持

pom文件

<?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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ljtao3</groupId>
    <artifactId>consumer-sentinel-feign</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>consumer-sentinel-feign</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>


        <!-- spring cloud 整合feign -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            <version>0.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>


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

    <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>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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

</project>

yml配置文件

server:
  port: 9103

spring:
  application:
    name: CONSUMER-SENTINEL-FEIGN
  cloud:
    sentinel:
      transport:
        dashboard: localhost:8080 #sentinel控制台的请求地址
      eager: true #取消控制台懒加载

eureka:
  instance:
    prefer-ip-address: true #注册服务的时候使用服务的ip地址 学习：https://study.163.com/course/courseMain.htm?courseId=1209401930
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/






#在feign中开启对sentinel的支持
feign:
  sentinel:
    enable: true #添加sentinel对feign的支持

1、启动类配置

@SpringBootApplication
@EnableDiscoveryClient//开启发现服务功能
@EnableFeignClients //
public class ConsumerSentinelFeignApplication {

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

}