Spring Cloud zuul网关服务 一

上一篇进行Netflix Zuul 1.0 与 gateway的对比。今天来介绍一下 zuul的搭建及应用

Zuul 工程建立

工程建立 cloud-gateway-zuul。仍是基于以前的工程
pom文件导入

<parent>
        <artifactId>spring-cloud-alibaba-basis</artifactId>
        <groupId>com.xian.cloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-gateway-zuul</artifactId>
    <name>网关服务zuul</name>

    <dependencies>
        <!-- 注册中心 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- 配置中心 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-nacos-config</artifactId>
        </dependency>
        <!-- fengin 支持 -->
       <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>
        <!-- zuul -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
    </dependencies>

建立GatewayZuulApplication启动类

package com.xian.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
import org.springframework.cloud.openfeign.EnableFeignClients;

/**
 * <Description>
 *
 * @author xianliru@100tal.com
 * @version 1.0
 * @createDate 2019/10/29 10:52
 */
@EnableZuulProxy
@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class GatewayZuulApplication {

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

建立 bootstrap.yml

spring:
  profiles:
    active: dev
  application:
    name: gateway-zuul-server
  cloud:
    nacos:
      config:
        server-addr: 47.99.209.72:8848
        file-extension: yaml

zuul:
  host:
    # 目标主机的最大链接数，默认值为200
    max-total-connections: 1000
    # 每一个主机的初始链接数，默认值为20
    max-per-route-connections: 200
  routes:
    discovery-server:
      path: /server/**
      serviceId: cloud-discovery-server
    client-common:
      path: /client/**
      serviceId: cloud-discovery-client
      sensitiveHeaders: X-ABC,Authorization
  # 全部路由的默认Hystrix隔离模式（ExecutionIsolationStrategy）为SEMAPHORE。若是此隔离模式是首选，则zuul.ribbonIsolationStrategy能够更改成THREAD
  ribbon-isolation-strategy: thread
  # 这个属性意思，指定忽略的服务列表 * 表明忽略全部服务
  ignored-services: '*'
  # 字段比较敏感，不但愿传递给下游微服务。 设置空没有要忽略的敏感字段。所有传给下游服务
  sensitive-headers: X-ABC
  ribbon:
    eager-load:
      # 强制加载，不设置会进行懒加载。spring 第一次请求会很是慢
      enabled: true

参数

• zuul.host.max-total-connections 目标主机的最大链接数。
• zuul.host.max-per-route-connections 每一个主机的初始链接数。

这个俩个参数是zuul的优化后的属性值，若是想有适合的配置，还须要根据业务状况而定

由于咱们有俩个业务服务 一个服务提供者 一个是服务消费者咱们配置俩个服务的分别路由 discovery-server、client-common

• path 是请求路径匹配规则
• serviceId 是咱们服务的spring.application.name 对应的值。
• sensitiveHeaders 字段比较敏感，不但愿传递给下游微服务。 设置空没有要忽略的敏感字段。所有传给下游服务这个字段能够是全局设置也能够是单个服务配置。
• ribbon-isolation-strategy 全部路由的默认Hystrix隔离模式（ExecutionIsolationStrategy）为SEMAPHORE。若是此隔离模式是首选，则zuul.ribbonIsolationStrategy能够更改成THREAD
• ignored-services 忽略全部微服务，只路由指定的微服务。

• ribbon.eager-load.enabled true 强制加载 false 默认懒加载

  • true日志打印效果 false 将不打印这段日志

2019-10-29 23:47:11.382 INFO 61396 --- [ main] c.n.l.DynamicServerListLoadBalancer : Using serverListUpdater PollingServerListUpdater
2019-10-29 23:47:11.450 INFO 61396 --- [ main] c.netflix.config.ChainedDynamicProperty : Flipping property: cloud-discovery-server.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2019-10-29 23:47:11.452 INFO 61396 --- [ main] c.n.l.DynamicServerListLoadBalancer : DynamicServerListLoadBalancer for client cloud-discovery-server initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=cloud-discovery-server,current list of Servers=[192.168.3.6:9012],Load balancer stats=Zone stats: {unknown=[Zone:unknown; Instance count:1; Active connections count: 0; Circuit breaker tripped count: 0; Active connections per server: 0.0;]
},Server stats: [[Server:192.168.3.6:9012; Zone:UNKNOWN; Total Requests:0; Successive connection failure:0; Total blackout seconds:0; Last connection made:Thu Jan 01 08:00:00 CST 1970; First connection made: Thu Jan 01 08:00:00 CST 1970; Active Connections:0; total failure count in last (1000) msecs:0; average resp time:0.0; 90 percentile resp time:0.0; 95 percentile resp time:0.0; min resp time:0.0; max resp time:0.0; stddev resp time:0.0]
]}ServerList:com.alibaba.cloud.nacos.ribbon.NacosServerList@33e4b9c4
2019-10-29 23:47:11.576 INFO 61396 --- [ main] c.netflix.config.ChainedDynamicProperty : Flipping property: cloud-discovery-client.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2019-10-29 23:47:11.577 INFO 61396 --- [ main] c.netflix.loadbalancer.BaseLoadBalancer : Client: cloud-discovery-client instantiated a LoadBalancer: DynamicServerListLoadBalancer:{NFLoadBalancer:name=cloud-discovery-client,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:null
2019-10-29 23:47:11.578 INFO 61396 --- [ main] c.n.l.DynamicServerListLoadBalancer : Using serverListUpdater PollingServerListUpdater
2019-10-29 23:47:11.639 INFO 61396 --- [ main] c.netflix.config.ChainedDynamicProperty : Flipping property: cloud-discovery-client.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2019-10-29 23:47:11.640 INFO 61396 --- [ main] c.n.l.DynamicServerListLoadBalancer : DynamicServerListLoadBalancer for client cloud-discovery-client initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=cloud-discovery-client,current list of Servers=[192.168.3.6:9011],Load balancer stats=Zone stats: {unknown=[Zone:unknown; Instance count:1; Active connections count: 0; Circuit breaker tripped count: 0; Active connections per server: 0.0;]
},Server stats: [[Server:192.168.3.6:9011; Zone:UNKNOWN; Total Requests:0; Successive connection failure:0; Total blackout seconds:0; Last connection made:Thu Jan 01 08:00:00 CST 1970; First connection made: Thu Jan 01 08:00:00 CST 1970; Active Connections:0; total failure count in last (1000) msecs:0; average resp time:0.0; 90 percentile resp time:0.0; 95 percentile resp time:0.0; min resp time:0.0; max resp time:0.0; stddev resp time:0.0]
]}ServerList:com.alibaba.cloud.nacos.ribbon.NacosServerList@256589a1

将三个服务所有启动。服务提供者和服务消费者还有zuul 服务
在控制台 输入命令 curl http://localhost:9083/client/client/test
![file](https://image-static.segmentfault.com/222/670/222670908-5db86371749bb_articlex)
咱们看到打印效果，请求经过网关服务成功转发到了咱们的下游服务上。并返回


- ribbon-isolation-strategy
- ignored-services
- sensitiveHeaders

以上几个参数、还有zuul服务的路由拦截器的使用，将在下一篇讲解。


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