Sentinel 服务容错

作者: WebGiser | 来源:发表于2021-09-25 19:27 被阅读0次

Sentinel 服务容错
Sentinel解决服务容错
第四章 Sentinel--服务容错
微服务限流容错降级Sentinel实战
二.Sentinel 流控规则的配置及说明
Redis Sentinel哨兵
精华推荐 |【深入浅出Sentinel原理及实战】「原理探索专题
集群容错
《一起学sentinel》一、一起搭建sentinel服务
redis sentinel

1、安装Sentinel

# 下载并启动sentinel服务
java -jar sentinel-dashboard-1.8.0.jar

访问：http://localhost:8080/#/dashboard，用户名和密码：sentinel、sentinel

1632569091(1).png

2、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>2.1.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.geovis</groupId>
    <artifactId>usercenter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>usercenter</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencyManagement>
        <!--SpringBoot整合Spring Cloud-->
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--SpringBoot整合Spring Cloud Alibaba-->
            <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>

        <!--服务发现依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--openfeign 声明式http调用-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>io.github.openfeign</groupId>
            <artifactId>feign-httpclient</artifactId>
        </dependency>
        <!--sentinel容错-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

        <!--        <dependency>
                    <groupId>org.mybatis.spring.boot</groupId>
                    <artifactId>mybatis-spring-boot-starter</artifactId>
                    <version>2.2.0</version>
                </dependency>-->

        <!--通用mapper依赖-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.1.5</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <jvmArguments>-Dfile.encoding=UTF-8</jvmArguments>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.6</version>
                <configuration>
                    <configurationFile>
                        ${basedir}/src/main/resources/generator/generatorConfig.xml
                    </configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.19</version>
                    </dependency>
                    <dependency>
                        <groupId>tk.mybatis</groupId>
                        <artifactId>mapper</artifactId>
                        <version>4.1.5</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

3、application.properties

server.port=8085

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.1.13:3306/user_center?characterEncoding=UTF8&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456

# 服务名称尽量用-，不要用_或特殊字符
spring.application.name=user-center
# nacos服务中心地址
spring.cloud.nacos.discovery.server-addr=localhost:8848
# 指定微服务实例所在的命名空间ID
spring.cloud.nacos.discovery.namespace=476e087f-6df4-499a-af4c-9dc933293655
# 指定微服务实例所在的集群名称
spring.cloud.nacos.discovery.cluster-name=NanJing

# ribbon负载均衡细粒度控制
# 饥饿加载(解决第一次访问缓慢问题)
ribbon.eager-load.enabled=true
ribbon.eager-load.clients=content-center
# 局部配置
content-center.ribbon.NFLoadBalanceRuleClassName=com.geovis.usercenter.configuration.NacosWeightedRule


# feign
# feign日志配置（NONE、BASIC、HEADERS、FULL）
logging.level.com.geovis.usercenter.feignclient.ContentCenterFeignClient = debug
# 让feign使用apache httpclient请求，而不是默认的urlconnection
feign.httpclient.enabled=true
# feign的最大连接数
feign.httpclient.max-connections=200
# feign单个路径的最大连接数
feign.httpclient.max-connections-per-route=50
feign.client.config.default.connectTimeout=10000
feign.client.config.default.readTimeout=10000
# 采用配置文件的方式控制feign的日志级别
# feign.client.config.content-center.loggerLevel = basic


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