SpringCloudAlibaba篇（五）整合GateWay（微服务网关，gateway+sentinel）2022年最新

GateWay执行流程

1.创建gateway模块

1.1 pom 依赖

    <?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>SpringCloudAlibaba2022</artifactId>
            <groupId>top.fate</groupId>
            <version>1.0.0</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>gateway</artifactId>
        <name>${project.artifactId}</name>
        <version>${fate.project.version}</version>
        <packaging>jar</packaging>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
        </properties>
    
        <dependencies>
            <!-- Nacos -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <exclusions>
                    <exclusion>
                        <groupId>com.alibaba.nacos</groupId>
                        <artifactId>nacos-client</artifactId>
                    </exclusion>
                </exclusions>
                <version>${spring-cloud-alibaba.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
                <exclusions>
                    <exclusion>
                        <groupId>com.alibaba.nacos</groupId>
                        <artifactId>nacos-client</artifactId>
                    </exclusion>
                </exclusions>
                <version>${spring-cloud-alibaba.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba.nacos</groupId>
                <artifactId>nacos-client</artifactId>
                <version>${alibaba.nacos.version}</version>
            </dependency>
            <!--SpringBoot2.4.x之后默认不加载bootstrap.yml文件，需要在pom里加上依赖-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-bootstrap</artifactId>
            </dependency>
            <!--网关依赖gateway-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-loadbalancer</artifactId>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-antrun-plugin</artifactId>
                    <executions>
                        <execution>
                            <phase>package</phase>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    
    </project>

1.2 创建启动类

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

1.3 创建配置文件

url:
  nacos: localhost:8848
spring:
  application:
    name: gateway #实例名
  profiles:
    active: dev
  cloud:
    nacos:
      discovery:
        #集群环境隔离
        cluster-name: shanghai
        #命名空间
        namespace: ${spring.profiles.active}
        #持久化实例 ture为临时实例 false为持久化实例  临时实例发生异常直接剔除, 而持久化实例等待恢复
        ephemeral: true
        #注册中心地址
        server-addr: ${url.nacos}
      config:
        namespace: ${spring.profiles.active}
        file-extension: yaml
        #配置中心地址
        server-addr: ${url.nacos}
        extension-configs[0]:
          data-id: gateway.yaml
          group: DEFAULT_GROUP
          refresh: false

1.4 nacos创建配置文件gateway.yaml

server:
  port: 30001
spring:
  cloud:
    gateway:
      routes:
        - id: user-service
          uri: lb://user-service
          predicates:
            - Path=/user/**
        - id: order-service
          uri: lb://order-service
          predicates:
            - Path=/order/**

1.5 启动测试

上边我已经在配置文件中配置了路由， 我们可以直接通过访问网关拼接断言名去访问 user-service 或者order-service的服务

• user-service访问成功

• order-service访问成功

下一篇，SpringCloudAlibaba篇（六）整合Seata（微服务分布式事务nacos+seata）

2. gateway整合sentinel

2.1 添加依赖

• pom

<!-- Sentinel -->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    <version>${spring-cloud-alibaba.version}</version>
</dependency>

这里我使用的是2021.0.1.0

详见，包括sentinel服务端的下载安装 SpringCloudAlibaba篇（三）整合Sentinel（限流、流量整形、熔断降级、系统负载保护、热点防护，分布式服务架构的高可用流量防护组件）

2.2 配置文件

• sentinel .yaml

spring:
  cloud:
    sentinel:
      transport:
        dashboard: localhost:8080

2.3 启动测试

• 访问我们的测试接口 http://localhost:30001/order/getUserService
• 测试成功