Linux systems use Logrotate for log backups

There are many log files on the Linux system, syslog message mail cron and so on, and application logs and access logs, which, under a lot of accesses, can grow rapidly, consume lots of private disk space and consume Io, The Access_log and catalina.out files of Nginx and Tomcat are now split by crontab using shell scripts on the wire.

Today accidentally think of logrotate, small tried, or good, record ...

Looking at the logs under the log directory, you can see that the logs about crontab are split, and we don't define this, what's the implementation? Is logrotate.

LL/VAR/LOG/-RW-------1 root root 0 February 03:21 cron-20150301-rw-------1 root root 0 March 1 03:20 CRO N-20150308-RW-------1 root root 0 March 8 03:19 cron-20150315-rw-------1 root root 0 March 03:35 cron- 20150322-RW-------1 root root 5740 March 22:10 cron-20150328

Look at the logrotate configuration file

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Configuration file is very simple, but also easy to understand, one will say the meaning of each parameter, you can see INCLUDE/ETC/LOGROTATE.D, look at this directory has a BAA?

[email protected] /var/log# ll /etc/logrotate.d/total dosage  40-rw-r--r--.  1 root  root  103 10 Month   3 2012 dracut-rw-r--r--  1 root  Root  185 8 Moon   15 2014 httpd-rw-r--r--.  1 root root   173 6 Month   22 2012 iscsiuiolog-rw-r--r--  1 root root   112 3 Month   28 22:05 market-rw-r-----  1 root named 170  10 Month  15 21:28 named-rw-r--r--  1 root root  136 8 Month   23 2010 ppp-rwxr-xr-x  1 root root  452 11 month    8 03:43 salt-rw-r--r--  1 root root  210 12 Month  10  18:05 syslog-rw-r--r--  1 root root  100 2 Month    4  2013 wpa_supplicant-rw-r--r--&nbSp; 1 root root   87 10 Month  16 23:15 yum 

The log for crontab is written in the syslog, so let's keep looking at the syslog configuration file.

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It seems that the main configuration file of the logrotate is not complete haha, that said a strength bar a tomcat log split, a nginx log segmentation

vim /etc/etc/logrotate.d/tomcat/data/market_tomcat/logs/catalina.out {    #定义日志的位置, Of course you can write more than just like the syslog     rotate 30                                #保留归档30天 ~ Do not explain, you know   is divided after the retention of one months     daily                                    #每天分割     copytruncate                             #表示此方法采用的是先拷贝再清空的方式     missingok                                #表示如果找不到log文件也没OK     notifempty                               #表示如果log文件是空的, do not rotate}

Save exit, we perform the next/usr/sbin/logrotate-f/etc/logrotate.conf under look at the log file under the Tomcat directory

[email protected]/data/market_tomcat/logs# ll catalina.out-20150328-rw-r--r--1 root root 233079086 March 22:05 Catalina . out-20150328

Examples of Nginx:

/data/logs/qa.qding.qdingnet_accesslog {daily Missingok rotate 5 notifempty Sharedscripts postrotate [!-f/var/run/nginx.pid] | | KILL-USR1 ' Cat/var/run/nginx.pid ' Endscript}

Just add a shell command, restart the Nginx drop. You know

Parameter description

Parameter function

Compress post-dump log after gzip compression

Nocompress when compression is not required, use this parameter

Copytruncate for log files that are still open, to back up and truncate the current log

Nocopytruncate backing up log files but not truncation

Create Mode owner group dump file, creating a new log file with the specified file mode

Nocreate do not create a new log file

When Delaycompress and compress are in use, the dump log file is compressed until the next dump

Nodelaycompress overrides the delaycompress option, the dump is compressed at the same time.

Errors error message sent to the specified email address when the address is stored

Ifempty even empty files are dumped, this is the default option for Logrotate.

Notifempty if it's an empty file, don't dump it.

Mail address sends dump log files to the specified e-mail addresses

Log file not sent when Nomail dump

Olddir directory dumps the log file into the specified directory and must be in the same file system as the current log file

Noolddir dump log file and current log file in the same directory

Prerotate/endscript commands that need to be executed before dumping can be placed in this pair, these two keywords must be taken separately

Postrotate/endscript commands that need to be executed after the dump can be placed in this pair, these two keywords must be taken separately

Daily Specify a dump cycle of daily

Weekly specify the dump cycle as weekly

Monthly specify a dump cycle of monthly

Rotate count Specifies the number of dumps before the log file was deleted, 0 means no backup, 5 means 5 backups reserved

Tabootext [+] list lets logrotate not dump files with the specified extension, the default extension is:. Rpm-orig,. Rpmsave, V, and ~

Size size is not dumped when the log file reaches the specified size, and size can specify bytes (default) and KB (Sizek) or MB (sizem).

Oh, that's right. We can take a look at the/etc/cron.daily/logrotate script, which is a daily backup to help with the log.

This article from "Qiu Anxiaoqiu" blog, please be sure to keep this source http://heygirl32895.blog.51cto.com/7623150/1626043

Linux systems use Logrotate for log backups