tencent cloud

Overview

After the domain name is added to Content Delivery Network (CDN), the CDN node will schedule and respond to all user resource requests. To help you statistically analyze resource access, CDN connects to the Cloud Log Service (CLS) platform, and supports uploading CDN access logs to CLS in real time for multi-dimensional analysis, including quality and performance monitoring, user access analysis using Top command, and download traffic statistics.

Note：

CDN Real-time Log Analysis is currently in beta. To use it, you can submit an application. You application will be reviewed within seven business days.

Log Collection

1. Log in to the CDN Console and click Log Service in the left sidebar to enter the log service page. Click the Real-time Log tab.
2. Click Create to create a log topic.
3. Enter the name of the new log topic and select the domain names to be bound to this topic:
   • The topic name must be unique.
   • A domain name can only be bound to one log topic.
   • The configuration will take effect in about 15 minutes.
4. Log in to the CLS Console and click Search Analysis in the left sidebar to enter the search analysis page. Complete the following configurations:
   • Select the Shanghai region
   • Select “cdn_logset” for Logset
   • Select the log topic created in Step 3 for Log Topic
5. Click Search Analysis to search CDN access logs in real time.

   Log data description

   The CDN logs uploaded to CLS contain the following fields:

   Log Field	Raw Log Type	CLS Type	Description
   app_id	Integer	long	APPID of your Tencent Cloud account
   client_ip	String	text	Client IP
   file_size	Integer	long	File size
   hit	String	text	Cache HIT/MISS. A hit in a CDN edge server or parent node will be marked as HIT
   host	String	text	Domain name
   http_code	Integer	long	HTTP status code
   isp	String	text	ISP
   method	String	text	HTTP request method
   param	String	text	URL parameters
   proto	String	text	HTTP protocol identifier
   prov	String	text	ISP districts
   referer	String	text	Referer information, i.e., HTTP source address
   request_range	String	text	Range parameter, i.e., request range
   request_time	Integer	long	Response time (in milliseconds), which refers to the time it takes for a node to return all packets to the client after receiving a request
   rsp_size	Integer	long	Number of bytes returned
   time	Integer	long	Request time, which is a UNIX timestamp
   ua	String	text	User-Agent information
   url	String	text	Request path
   uuid	String	text	Unique request identifier
   version	Integer	long	Version protocol

Log Analysis Samples

Overall quality analysis

Health log requests

http_code<500 | select count(*)

Average access latency

select ROUND(avg(request_time),2)

Error diagnosis

Error code distribution

select http_code,count(*) as c group by http_code order by c desc

Querying and analyzing logs of an error code

http_code:403