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【Azure 应用服务】更便捷的方式抓取Azure App Service for Windows的网络包

问题描述

在之前的一篇博文中,介绍了在App Service中抓取网络日志:

  1. 抓取Windows的网络包:​​【应用服务 App Service】App Service中抓取网络日志​​
  2. 抓取Linux的网络包:​​【Azure 应用服务】App Service For Linux 如何在 Web 应用实例上住抓取网络日志​​

现在,随着App Service的更新,Linnx也可以直接登录到SSH而不在需要复杂的配置操作。同时Windows环境中,也不在需要在本地安装 armclient.exe工具,而是直接通过 App Service的门户完成抓取,下载操作。

 

操作步骤

第一步: 进入App Service的Overview页面,点击“Diagnose and solve problems”, 然后再选择“ Diagnostic Tools” 方块

【Azure 应用服务】更便捷的方式抓取Azure App Service for Windows的网络包_应用服务

第二步:选择 Collect Network Trace , 并设定抓取日志的时间长度, 60秒 ~ 15分钟的值供选择。页面中也对抓取网络日志的情况进行了说明:

【Azure 应用服务】更便捷的方式抓取Azure App Service for Windows的网络包_应用服务_02

Collect a Network Trace

If your app is facing issues while connecting to a remote server, you can use this tool to collect a network trace on the instance(s) serving the Web App.

Analyzing network traces is complex and time consuming task. Before collecting a network trace, please make sure you understand that you really need to collect a network trace to troubleshoot the problem.

What you should know before collecting a Network Trace

  • 网络日志帮助定位TCP丢包,检查App Service与其他服务之间的HTTP通信情况(Network traces are helpful to troubleshoot TCP packet loss and to check HTTP communication that your App is making with the remote endpoints.)
  • 在开始抓取网络日志后,要在App Service上重新我们需要抓包解决的问题(After the network trace is started, you should reproduce the problem so that outbound traffic from your App gets captured in the trace.)
  • 如果适用HTTPS,那么数据将被加密(If the remote endpoints are called over TLS or SSL (i.e. HTTPS), then the traffic in the trace will be encrypted.)
  • 将会收集应用所在的全部实例上的网络包(Network traces are collected on all the instance(s) serving your App.)
  • 抓取网络日志只包含当前正在运行进程。当抓取网络包开始后,新的进程的网络包将不被抓取(Traces are captured only of processes that are running when the trace is started. The trace does not capture packets of any processes that start after the capture is started.)
  • 可以适用Network Monitor和Wireshark工具对网络包进行分析(To analyze the Network Trace, you need tools like​​Network Monitor ​​or​​Wireshark​​ that can open the network captures.)

 

第三步:等待抓取时间完成,页面会直接显示网络包的下载地址。点击即可。

PS:此处不需要在登录到Kudu站点中,到 c:\home\logfiles\networktrace 目录中进行下载,但是如果要查看历史的网络抓包文件,还是需要到Kudu站点中下载。

【Azure 应用服务】更便捷的方式抓取Azure App Service for Windows的网络包_linux_03

注意:当前App Service For Linux环境,还是不支持以上方式抓包。 需要SSH,然后执行以下命令:

tcpdump -i any host <your app service inbound ip address> and tcp port 443 -n -v -s 0 -w /tmp/appnetworktrace.pcap

 

 [END]

当在复杂的环境中面临问题,格物之道需:浊而静之徐清,安以动之徐生。 云中,恰是如此!

分类: ​​【Azure 应用服务】​​, ​​【Azure 环境】​​

标签: ​​App Service​​, ​​在 Web 应用实例上住抓取网络日志​​

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