日志切割软件cronolog
下载地址: http://cronolog.org/download/cronolog-1.6.2.tar.gz
1.安装过程
tar zxvf cronolog-1.6.2.tar.gz
cd cronolog-1.6.2
./configure
make
make install
2.修改Apache的配置文件httpd.conf，加入以下代码
ErrorLog "|/usr/local/sbin/cronolog /usr/local/apache2.2.22/logs/error_log_%Y%m%d"
CustomLog "|/usr/local/sbin/cronolog /usr/local/apache2.2.22/logs/access_log_%Y%m%d" combined
如果是虚拟主机，则修改http_vhost.conf,例如
<VirtualHost *:80>
ServerAdmin ngnix@
DocumentRoot "/usr/local/apache2.2.22/htdocs/"
ServerName
ServerAlias bbs.
ErrorLog "|/usr/local/sbin/cronolog /usr/local/apache2.2.22/logs/-error_log_%Y%m%d"
CustomLog "|/usr/local/sbin/cronolog /usr/local/apache2.2.22/logs/-access_log_%Y%m%d"
combined
</VirtualHost>
<VirtualHost *:80>
ServerAdmin ngnix@
DocumentRoot "/usr/local/apache2.2.22/htdocs/innodb.com"
ServerName innodb.com
ServerAlias
ErrorLog "|/usr/local/sbin/cronolog /usr/local/apache2.2.22/logs/innodb.com-error_log_%Y%m%d"
CustomLog "|/usr/local/sbin/cronolog /usr/local/apache2.2.22/logs/innodb.com-access_log_%Y%m%d"
combined
</VirtualHost>
4.编写脚本,可以定时删除过期的日志(如下10天前)
#!/bin/bash
find /usr/local/apache2.2.22/logs -mtime +10 -name "innodb.com-*" -exec rm -rf {} \;
5.加入crontab
crontab -e
* 2 * * * /usr/local/bin/ > /dev/null 每天凌晨2点执行脚本
apache自带日志切割rotatelogs
1.直接修改httpd.conf或者虚拟主机配置文件httpd_vhost.conf
ErrorLog "|/usr/local/apache2.2.22/bin/rotatelogs /usr/local/apache/logs/myisam_error_log_%Y-%m-%d
-%H_%M_%S 86400" (86440单位是秒意思是1天)
CustomLog "|/usr/local/apache2.2.22/bin/rotatelogs /usr/local/apache/logs/myisam_access_log_%Y-%m-
%d-%H_%M_%S 86400" common
也可以定义日志大小，例如
ErrorLog "|/usr/local/apache2.2.22/bin/rotatelogs /usr/local/apache/logs/myisam_error_log_%Y-%m-%d
-%H_%M_%S 5M" (5M意思是每5M就生成新的日志)
CustomLog "|/usr/local/apache2.2.22/bin/rotatelogs /usr/local/apache/logs/myisam_access_log_%Y-%m-
%d-%H_%M_%S 5M" common
注意：rotatelogs设置的时候如果有多个虚拟主机，那么每个虚拟主机都需要配置，不然不会生成我们需要的日
志。
这两个程序还有一点不同： cronolog 如果日志是放在某个不存在的路径则会自动创建目录，而使用 rotatelogs
时不能自动创建。
