Access log for Nginx

The log format of Nginx is in the main configuration file of Nginx (/ usr/local/nginx/conf/nginx.conf)

[root@shuai-01 vhost]# vim /usr/local/nginx/conf/nginx.conf

You can change the log format name to shaui

The meaning of Nginx log field

Define the format of the log in the main configuration file and the log path in the virtual host configuration file.

Open virtual host profile

[root@shuai-01 vhost]# vim test.com.conf 

access_log /tmp/test.com.log shuai；

Note that ";" should be added after writing a line of Nginx configuration file, otherwise it is an error.

Check the configuration file syntax and reload the configuration file

[root@shuai-01 vhost]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@shuai-01 vhost]# /usr/local/nginx/sbin/nginx -s reload

testing:

[root@shuai-01 vhost]# curl -x127.0.0.1:80 test2.com/index.html -I
HTTP/1.1 301 Moved Permanently
Server: nginx/1.12.2
Date: Mon, 08 Jan 2018 12:41:20 GMT
Content-Type: text/html
Content-Length: 185
Connection: keep-alive
Location: http://test.com/index.html

[root@shuai-01 vhost]# curl -x127.0.0.1:80 test3.com/index.html -I
HTTP/1.1 301 Moved Permanently
Server: nginx/1.12.2
Date: Mon, 08 Jan 2018 12:41:26 GMT
Content-Type: text/html
Content-Length: 185
Connection: keep-alive
Location: http://test.com/index.html

[root@shuai-01 vhost]# cat /tmp/test.com.log 
127.0.0.1 - [08/Jan/2018:20:41:20 +0800] test2.com "/index.html" 301 "-" "curl/7.29.0"
127.0.0.1 - [08/Jan/2018:20:41:26 +0800] test3.com "/index.html" 301 "-" "curl/7.29.0"

Nginx log cutting

Because nginx does not have its own log cutting tool, it needs to use the log cutting tool of the system or write a log cutting script.

Write a log cutting script by yourself. Script unified save / usr/local/sbin/
Customize a script first:

[root@shuai-01 vhost]# vim /usr/local/sbin/nginx_logrotate.sh


#! /bin/bash
## Assume that the log storage path of nginx is / tmp/
d=`date -d "-1 day" +%Y%m%d` 
#Define cutting time (log one day before cutting)
logdir="/tmp/"
#The log path to cut (from the virtual host profile) is specified here
nginx_pid="/usr/local/nginx/logs/nginx.pid"
#The purpose of calling pid is to execute the command: / bin / kill - HUP ` cat $nginx? pid`
#This command is equivalent to the command: nginx -s reload to ensure synchronization with changes to the virtual host configuration file
#This address is from nginx configuration file
cd $logdir
for log in `ls *.log`
do
    mv $log $log-$d
done
#Use general configuration to cycle here, and change the name (cutting is the daily log rename)
/bin/kill -HUP `cat $nginx_pid`
#Execute this command to overload and generate a new log file to record the new log

Execute script:

[root@shuai-01 vhost]# sh -x /usr/local/sbin/nginx_logrotate.sh 
++ date -d '-1 day' +%Y%m%d
+ d=20180108
+ logdir=/tmp/
+ nginx_pid=/usr/local/nginx/logs/nginx.pid
+ cd /tmp/
++ ls test.com.log
+ for log in '`ls *.log`'
+ mv test.com.log test.com.log-20180108
++ cat /usr/local/nginx/logs/nginx.pid
+ /bin/kill -HUP 1513

-x: to display the script execution process
be careful:
This is just to cut the log. Deleting the log needs to be used in combination with the task plan cron. Cutting must also be used with cron.

Static files do not log and expire

Add configuration to the configuration file:

Open profile:

[root@shuai-01 vhost]# vim test.com.conf

location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
 #Match file type
{
      expires      7d;
      #Expiration time is 7 days
      access_log off;  
      #Do not log access to files of this type     
}   
location ~ .*\.(js|css)$
{
      expires      12h;
      #Expires 12 hours
      access_log off;
      #Do not log access to files of this type
}

Check the configuration file syntax and reload the configuration file:

[root@shuai-01 vhost]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@shuai-01 vhost]# /usr/local/nginx/sbin/nginx -s reload

Test:

[root@shuai-01 test.com]# curl -x127.0.0.1:80 test.com/1.gif
shjdkjhkasb
[root@shuai-01 test.com]# curl -x127.0.0.1:80 test.com/2.js
ajkfdchb
[root@shuai-01 test.com]# curl -x127.0.0.1:80 test.com/index.html
test.com
[root@shuai-01 test.com]# cat /tmp/test.com.log
127.0.0.1 - [09/Jan/2018:00:39:45 +0800] test.com "/index.html" 200 "-" "curl/7.29.0"