2018-3-14 Linux Learning Notes

12.10 Nginx Access Log

• The format of the Nginx access log is defined in the master configuration file.
• vim/usr/local/nginx/conf/nginx.conf//Search Log_format
  

• Log field Meaning:
  $remote _ADDR Client IP (public IP)
  $http IP of the _x_forwarded_for proxy server
  $time _local Server local time
  $host Access host name (domain name)
  $request URL address for _uri access
  $status Status Code
  $http _referer Referer
  $http _user_agent User_agent

• In addition to defining the log format in the Master profile nginx.conf, it is also required in the virtual host configuration file
  Vi/usr/local/nginx/conf/vhost/test.com.conf
• Add a row to configure where the access logs are stored
  Access_log/tmp/1.log Nginx_log;
  
• The nginx_log here is the name of the log format defined in nginx.conf
• /usr/local/nginx/sbin/nginx-t
• /usr/local/nginx/sbin/nginx-s Reload

• Access log test results:
  Curl-x127.0.0.1:80 Test.com-i
  Curl-x127.0.0.1:80 Test2.com-i
  Cat/tmp/1.log
  

12.11 Nginx Log Cutting

• As stated earlier, in order to prevent the log from taking up too much storage space, we need to cut the logs and clean them regularly. Since Nginx does not have a cutting tool, learn to use shell scripting to implement log cutting.

• Custom shell Scripts
  Vim/usr/local/sbin/nginx_log_rotate.sh #写入如下内容
  #! /bin/bash
  #假设nginx的日志存放路径为/tmp/
  D= ' date-d '-1 day "+%y%m%d"
  Logdir= "/tmp/"
  Nginx_pid= "/usr/local/nginx/logs/nginx.pid"
  CD $logdir
  For log in ' ls *.log '
  Do
  MV $log $log-$d
  Done
  /bin/kill-hup ' Cat $nginx _pid '

• execute the log cut script :
  Sh-x/usr/local/sbin/nginx_log_rotate.sh #加-X can see the script execution process
  
• Set up a log cutting task schedule
  Crontab-e

• Add the following line:
  0 0 * * */bin/bash/usr/local/sbin/nginx_log_rotate.sh
  

• example of periodic cleanup log files (delete log files for more than 30 days):
  find/tmp/-name *.log-*-tpye f-mtime +30 | Xargs RM

12.12 static files do not log logs and expire time

• To set how static files do not log and expire time:
• Edit a virtual host configuration file
  Vim/usr/local/nginx/conf/vhost/test.com.conf
• Configured as follows
  Location ~. \. (gif|jpg|jpeg|png|bmp|swf) $
  {
  Expires 7d;
  Access_log off;
  }
  Location ~. \. (JS|CSS) $
  {
  Expires 12h;
  Access_log off;
  }

• /usr/local/nginx/sbin/nginx-t
• /usr/local/nginx/sbin/nginx-s Reload

• Test results:
  Cd/data/wwwroot/test.com
  Vim 1.gif
  Vim 2.css
  Curl-x127.0.0.1:80 Test.com/1.gif
  Curl-x127.0.0.1:80 Test.com/2.css
  Curl-x127.0.0.1:80 test.com/index.html
  Curl-x127.0.0.1:80 TEST.COM/2.CSSASDFA
  Curl-x127.0.0.1:80 Test.com/1.gif-i
  Cat/tmp/1.log
  

2018-3-14 Linux Learning Notes