Nginx access_log log analysis and configuration

Foreword:
Through the log, you can know the user’s address, which parts of your website are most popular, the user’s browsing time, and targeted optimization for most users’ browsers.

Nginx’s logs are divided into: access log and error log

The access log records user information, page views, and user browsers, ips, and other access information.

Error log is to log the server error log

Log_format log format syntax

Log_format name (format name) format style (that is, what kind of log content you want to get)

Example

error log

hxff and htci are just for easy distinction. You can fill in any mark that you can distinguish, or ignore it at all.

From the above we can see a few pieces of information:

      1. User client IP address. Such as: 1.1.1.1 in the above example
      2. Access time. For example: [13/Oct/2018:21:17:20 -0600] in the above example
      3. Access the port. Such as: 127.0.0.1: 9000 in the above example
      4. Response time. Such as: 0.007 in the above example
      5. Request time. Such as: 0.007 in the above example
      6. User location code (country code). Such as: US (United States) in the above example
      7. The host of the requested url address (target url address). Such as: nginxer.com in the above example
      8. Request method (GET or POST, etc.). Such as: GET in the above example
      9. Request the url address (remove the host part). For example: /www/wwwroot/test.html in the above example
      10. Request status (status code, 200 means success, 404 means the page does not exist, 301 means permanent redirection, etc., the specific status code can find relevant articles on the Internet, no longer repeat). Such as: “200” in the above example
      11. Request page size, default is B (byte). Such as: 2888 in the above example
      12. The source page, from which page to the page, the professional name is called “referer”. For example: “http://a.com” in the above example
      13. User browser language. For example: “es-ES, es;q=0.8” in the above example
      14. Other information of the user’s browser, browser version, browser type, etc. For example: “Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11”

In fact, the format of the nginx access log is not static and can be customized.