灰度实战（五）:SpringCloud灰度（1）

末蓝、 2021-12-17 01:57 303阅读 0赞

强烈推荐一个大神的人工智能的教程：[http://www.captainbed.net/zhanghan][http_www.captainbed.net_zhanghan]

### 【前言】 ###

在上四篇博文中讲解了Apollo如何动态配置，以及Apollo的对灰度发布支持；在本篇博文中为大家带来我们项目（Spring Cloud）的灰度实战。

### 【SpringCloud灰度实战】 ###

**         一、项目简介**

1、项目目录：

gray-cloud
    ├── gray-eureka -- 注册中心
    ├── gray-service-sms -- 短信服务代码
    └── gray-zuul -- 网关

2、项目架构图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70][]

3、网关路由分发图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 1][]

**         二、代码展示**

1、重要代码展示---灰度拦截器（GrayRedirectZuulFilter）

/*
     * Copyright (c) 2019. zhanghan_java@163.com All Rights Reserved.
     * 项目名称：灰度实战
     * 类名称：GrayRedirectZuulFilter.java
     * 创建人：张晗
     * 联系方式：zhanghan_java@163.com
     * 开源地址: https://github.com/dangnianchuntian/springboot
     * 博客地址: https://blog.csdn.net/zhanghan18333611647
     */
    
    package com.zhanghan.zuul.filter;
    
    
    import com.netflix.zuul.ZuulFilter;
    import com.netflix.zuul.context.RequestContext;
    import com.zhanghan.zuul.bean.GrayBean;
    import net.sf.json.JSONObject;
    import org.apache.commons.lang.StringUtils;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.http.HttpHeaders;
    import org.springframework.http.HttpStatus;
    import org.springframework.util.StreamUtils;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.InputStream;
    import java.nio.charset.Charset;
    
    import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
    
    public class GrayRedirectZuulFilter extends ZuulFilter {
    
    
        @Autowired
        private GrayBean grayBean;
    
        @Override
        public String filterType() {
            return PRE_TYPE;
        }
    
        @Override
        public int filterOrder() {
            return 0;
        }
    
        @Override
        public boolean shouldFilter() {
            return grayBean.isEnabled();
        }
    
        @Override
        public Object run() {
    
            if (shouldBeRedirected()) {
                RequestContext.getCurrentContext().setSendZuulResponse(false);
                String redirectUrl = generateRedirectUrl(grayBean.getSuffix());
    
                sendRedirect(redirectUrl);
            }
    
            return null;
        }
    
        /**
         * 是否为灰度请求 依据条件同时满足1和2: 1.请求在灰度列表中 2.companyNo为配置的灰度companyNo
         *
         * @return
         */
        private boolean shouldBeRedirected() {
    
            HttpServletRequest request = RequestContext.getCurrentContext().getRequest();
    
    
            if (grayBean.isEnabled()) {
    
                if (grayBean.getGraylist().isEmpty()) {
                    return false;
                }
    
                String requestUrl = request.getRequestURI();
    
                if (grayBean.getGraylist().contains(requestUrl.split("/")[1])) {
    
                    Object companyNo = getParment(request, "companyNo");
    
                    if (null != companyNo && companyNo.toString().equals(grayBean.getCompanyNo())) {
                        return true;
                    }
    
                }
    
            }
            return false;
        }
    
        /**
         * 获取post请求的body
         *
         * @param request
         * @param parmentKey
         * @return
         */
        private static Object getParment(HttpServletRequest request, String parmentKey) {
    
            try {
    
                String charset = request.getCharacterEncoding();
    
                InputStream inputStream = request.getInputStream();
    
                String body = StreamUtils.copyToString(inputStream, Charset.forName(charset));
    
                if (StringUtils.isEmpty(body)) {
                    return null;
                }
    
                JSONObject json = JSONObject.fromObject(body);
    
                return json.get(parmentKey);
    
            } catch (Exception e) {
                return null;
            }
    
        }
    
        /**
         * 获取重定向URL
         *
         * @param graySuffix 灰度后缀
         * @return
         */
        private static String generateRedirectUrl(String graySuffix) {
    
            HttpServletRequest request = RequestContext.getCurrentContext().getRequest();
            String queryParams = request.getQueryString();
            Object originalRequestPath = request.getRequestURI();
    
            String[] modifiedRequestPathArr = (originalRequestPath.toString().split("/", 3));
            modifiedRequestPathArr[1] = modifiedRequestPathArr[1] + graySuffix;
    
            StringBuilder stringBuilder = new StringBuilder();
            for (String str : modifiedRequestPathArr) {
                if (StringUtils.isNotEmpty(str)) {
                    stringBuilder.append("/");
                    stringBuilder.append(str);
                }
            }
    
            return stringBuilder.toString() + (queryParams == null ? "" : ("?" + queryParams));
        }
    
        /**
         * 进行重定向
         *
         * @param redirectUrl 重定向URL
         */
        private static void sendRedirect(String redirectUrl) {
    
            RequestContext ctx = RequestContext.getCurrentContext();
            HttpServletResponse response = ctx.getResponse();
            HttpServletRequest request = ctx.getRequest();
    
            try {
                if (request.getMethod().toUpperCase().equals("POST")) {
                    response.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
                } else {
                    response.setStatus(HttpStatus.MOVED_PERMANENTLY.value());
                }
                response.setHeader(HttpHeaders.LOCATION, redirectUrl);
                response.flushBuffer();
    
            } catch (Exception ex) {
            }
    
        }
    
    
    }

2、启动类（启用GrayRedirectZuulFilter）

/*
     * Copyright (c) 2019. zhanghan_java@163.com All Rights Reserved.
     * 项目名称：灰度实战
     * 类名称：ZhZuulApplication.java
     * 创建人：张晗
     * 联系方式：zhanghan_java@163.com
     * 开源地址: https://github.com/dangnianchuntian/springboot
     * 博客地址: https://blog.csdn.net/zhanghan18333611647
     */
    
    package com.zhanghan.zuul;
    
    import com.zhanghan.zuul.filter.GrayRedirectZuulFilter;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
    import org.springframework.context.annotation.Bean;
    
    @SpringBootApplication
    @EnableEurekaClient
    @EnableZuulProxy
    public class ZhZuulApplication {
    
        public static void main(String[] args) {
    
            SpringApplication.run(ZhZuulApplication.class, args);
        }
    
    
        /**
         * 重定向方式的Filter---性能低
         */
        @Bean
        public GrayRedirectZuulFilter grayRedirectZuulFilter() {
            return new GrayRedirectZuulFilter();
        }
    
        /**
         * 直接跳转方式的Filter---性能高建议采用
         *
         * @return
         */
    //    @Bean
    //    public GrayDirectZuulFilter grayDirectZuulFilter() {
    //        return new GrayDirectZuulFilter();
    //    }
    
    
    }

3、其他代码

灰度实战：[https://github.com/dangnianchuntian/gray][https_github.com_dangnianchuntian_gray]

项目模块：gray-cloud

**         三、项目部署**

1、Apollo配置中心配置

(1)eureka注册中心配置

# Spring cloud config
    spring.application.name=zh_eureka
    server.port=8090
    
    # Eureka config for discovery
    eureka.instance.metadataMap.group=eureka-group
    eureka.client.serviceUrl.defaultZone=http://172.16.11.230:8090/eureka/
    eureka.instance.preferIpAddress=true

(2)短信业务配置

spring.application.name = service_sms
    server.port = 1100
    eureka.client.serviceUrl.defaultZone = http://172.16.11.230:8090/eureka/
    eureka.instance.preferIpAddress = true

(3)zuul网关配置

spring.application.name = zh_zuul
    server.port = 8099
    
    zuul.debug.request = true
    
    zuul.routes.servicesms.path = /service_sms/**
    zuul.routes.servicesms.serviceId = service_sms
    zuul.routes.servicesms_gray.path = /service_sms_gray/**
    zuul.routes.servicesms_gray.serviceId = service_sms_gray
    
    eureka.client.serviceUrl.defaultZone = http://172.16.11.230:8090/eureka/
    management.endpoints.web.exposure.include = *
    hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds = 60000
    feign.hystrix.enabled = false
    ribbon.ReadTimeout = 60000
    ribbon.ConnectTimeout = 5000
    
    # 灰度相关配置  close gray:false  open gray:true
    gray.bean.enabled = false
    gray.bean.suffix = _gray
    gray.bean.companyNo = dmsd
    gray.bean.graylist[0] = service_sms

** **               2、部署相关服务

(1)部署eureka注册中心服务(服务器172.16.11.230)

a.启动命令

nohup java -jar -Xmx128m  -Dapollo_meta=http://172.16.11.226:8088 -Dapp_ip="gray_cloud" -Dapollo_namespaces=eureka gray-eureka.jar &

b.启动正常验证

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 2][]

(2)部署短信业务服务

a.部署 172.16.11.223 服务器

①启动命令：

# 通过sid区分不同服务器，以验证请求是分发到哪台服务器
    nohup java -jar -Xmx128m -Dsid=sms-223  -Dapollo_meta=http://172.16.11.226:8088 -Dapp_ip="gray_cloud" -Dapollo_namespaces=sms gray-service-sms.jar &

②启动正常验证：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 3][]

b.部署172.16.11.230  服务器

①启动命令：

# 通过sid区分不同服务器，以验证请求是分发到哪台服务器
    nohup java -jar -Xmx128m -Dsid=sms-230  -Dapollo_meta=http://172.16.11.226:8088 -Dapp_ip="gray_cloud" -Dapollo_namespaces=sms gray-service-sms.jar &

②启动正常验证：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 4][]

(3)部署zuul网关服务(服务器172.16.11.223)

a.启动命令

nohup java -jar -Xmx128m -Dapollo_meta=http://172.16.11.226:8088 -Dapp_ip="gray_cloud" -Dapollo_namespaces=zuul gray-zuul.jar &

b.启动正常验证

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 5][]

**        三、演示灰度**

** **               1、正常情况：

(1)访问示意图

(2)验证（默认zuul分发策略为轮循）

a.单数次访问(请求均落在223机器上)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 6][]

b.双数次访问(请求均落在230机器上)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 7][]

** **              2、项目升级（灰度发布；将230置为灰度服务）

(1)访问最终示意图

(2)灰度步骤

a.修改230服务名称（将230服务的流量摘除）

①本步操作示意图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 8][]

②操作步骤：

（①）在Apollo上进行灰度发布(详细步骤参考上篇博文《[灰度实战（四）:Apollo配置中心（4）][Apollo_4]》)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 9][]

（②）查看eureka发现230服务名已经更改

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 10][]

（③）这时多次访问zuul发现请求一直落在223上：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 3][]

b. 更新230代码（将短信代码由V1.0升级到V2.0）

①本步操作示意图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 11][]

②操作步骤：一般由公司运维执行（从git上拉最新的代码，打包，发布）

c.将230服务挂载到网关上（此时正常流量全部分发到223服务器上，灰度流量【本例灰度流量标记companyNo=dmsd  可在zuul配置文件中灵活配置】分发到230上）

①访问示意图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 12][]

②操作步骤

（①）打开zuul灰度开关

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 13][]

（②）正常流量验证：正常流量一直分发到223服务器

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 14][]

（③）灰度流量验证：灰度流量一直分发到230服务器【本例灰度流量标记companyNo=dmsd  可在zuul配置文件中灵活配置】

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 7][]

d.灰度测试完毕后（一般为测试发起请求），说明新的代码在生产环境没有问题；

e.让230服务接收正常流量

①本步操作示意图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 15][]

②操作步骤

（①）在Apollo的sms中撤销230的灰度发布

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 16][]

（②）在Apollo的zuul中将灰度开关关闭

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 17][]

（③）此时再访问发现请求又换成轮循

**·**一次访问落在223机器上

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 18][]

**·**一次访问落在230机器上

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 19][]

g.摘掉223的流量

①本步操作示意图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 20][]

②操作步骤(针对223进行灰度)

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 9][]

h.升级223代码（示意图）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 21][]

i.让223重新接收请求

①本步操作示意图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 22][]

②操作步骤

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI4MjkxMjQ_size_16_color_FFFFFF_t_70 16][]

### 【总结】 ###

1、本节为大家演示SpringCloud的灰度。

2、在接下来会为大家演示本版本的升级版---zuul接收到灰度请求时，将重定向优化为直接调用至灰度服务。

[http_www.captainbed.net_zhanghan]: http://www.captainbed.net/zhanghan
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[https_github.com_dangnianchuntian_gray]: https://github.com/dangnianchuntian/gray
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[Apollo_4]: https://blog.csdn.net/zhanghan18333611647/article/details/94734557
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