对于服务器的日常维护来说，日志清理是非常重要的事情，如果残留日志过多则严重浪费磁盘空间同时影响服务的性能。如果用手工方式进行清理，会花费太多时间，并且很多时候难以满足实际要求。例如：如何在每个星期六凌晨3点把超过2G大的日志文件进行切割，保留最新的100M日志记录？
网上没有发觉能满足本座要求的日志切割工具，因此花了一些闲暇时间自己写了一个。由于要在多个平台上使用，为了方便采用 Java 实现。本工具命名为 LogCutter，主要有以下特点：
- 支持 Linux、Mac 和 Windows 等所有常见操作系统平台
- 支持命令行交互式运行
- 支持后台非交互式运行（Linux/MAC 下使用 daemon 进程实现，Windows 用系统 Service 实现）
- 支持两种日志清理方式（删除日志文件或切割日志文件）
- 支持对 GB18030、UTF-8、UTF-16LE、UTF-16BE 等常用日志文件类型进行切割（不会发生切掉半个字符的情况）
- 高度可配置（程序执行周期、要删除的日志文件过期时间、要切割的日志文件阀值和保留大小等均可配置
使用方法：
- *******************************************************
- **** LogCutter - Bruce Liang, all rights reserved. ****
- *******************************************************
- 一、启动方式
- --------------------------------------------------
- ) Windows
- A) 前台运行: > ./run.bat
- B) 后台运行: > ./LogCutter.exe {
- -install-demand (安装手动启动服务)
- -install-auto (安装自动启动服务)
- -start (启动服务)
- -stop (停止服务)
- -status (查看服务状态)
- }
- *** 注 ***
- @ LogCutter.exe 以 Windows 系统服务的方式运行，安装好后也可以通过 Windows 服务管理器进行管理
- @ LogCutter.exe 依赖 JRE 1.6, 因此必须在注册表或环境变量中设置 %JAVA_HOME%
- ) Linux / Unix
- A) 前台运行: $ ./run.sh
- B) 后台运行: $ ./run.sh -d
- *** 注 ***
- @ 可以设置为开机时自动后台运行，方法如下:
- $ vi /etc/rc.d/rc.local
- ( 加入: ${YOUR_LOGCUTTER_PATH}/run.sh -d )
- --------------------------------------------------
- 二、配置文件
- --------------------------------------------------
- ) 程序配置文件: ./conf/config.xml
- ) 日志配置文件: ./conf/log4j.properties (默认)
- --------------------------------------------------
- 三、环境要求
- --------------------------------------------------
- ) Java 版 本: JRE 1.6 以上
- ) 依赖程序包: dom4j、log4j、juniversalchardet
- --------------------------------------------------
run.sh (Mac 平台)
- #!/bin/bash
- JAVA_HOME="/Library/Java/Home"
- CLASSPATH=$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
- JAVA_BIN=$JAVA_HOME/bin
- JAVA=$JAVA_BIN/java
- APP_PATH="/Users/Kingfisher/MyWork/Java/LogCutter"
- APP_CLASSPATH=$APP_PATH/classes
- APP_LIBPATH=$APP_PATH/lib
- APP_LIBS=$APP_LIBPATH/dom4j-1.6.1.jar:$APP_LIBPATH/log4j-1.2.16.jar:$APP_LIBPATH/juniversalchardet-1.0.3.jar
- APP_CONFPATH=$APP_PATH/conf
- APP_CONFFILE=$APP_CONFPATH/config.xml
- APP_MAIN_CLASS=com.bruce.main.LogCutter
- DAEMON='-d'
- CMD="$JAVA -cp $CLASSPATH:$APP_CLASSPATH:$APP_LIBS $APP_MAIN_CLASS -f $APP_CONFFILE"
- if [ $# -eq 0 ]
- then
- $CMD
- elif [ "$#" -eq 1 -a "$1" = "$DAEMON" ]
- then
- $CMD &
- else
- echo "Usage: $0 [ $DAEMON ]"
- exit 1
- fi
交互式运行操作演示：
- [Kingfisher@Bruce-mbp LogCutter] $ pwd
- /Users/Kingfisher/MyWork/Java/LogCutter
- [Kingfisher@Bruce-mbp LogCutter] $ ./run.sh
- command line usage
- ------------------------------------------------------------
- HELP : Show help
- JOBS : Show jobs status
- CFG : Show configuration summary
- RUN : Schedule jobs manually
- !Q : Shutdown application
- ? : About me
- ------------------------------------------------------------
- > help
- command line usage
- ------------------------------------------------------------
- HELP : Show help
- JOBS : Show jobs status
- CFG : Show configuration summary
- RUN : Schedule jobs manually
- !Q : Shutdown application
- ? : About me
- ------------------------------------------------------------
- > jobs
- jobs summary (total: 2, active: 0)
- ------------------------------------------------------------
- . DelFileRunner@334936591 [ Idle ]
- . CutFileRunner@724646150 [ Idle ]
- ------------------------------------------------------------
- > cfg
- configuration summary
- ------------------------------------------------------------
- [global]
- start-check-delay : 1 hours
- check-interval : 24 hours
- log4j-config-file : /Users/Kingfisher/MyWork/Java/LogCutter/classes/../conf/log4j.properties
- lock-file : /Users/Kingfisher/MyWork/Java/LogCutter/classes/../LogCutter.lock
- [delete-files] (expire: 30 days)
- . /opt/LogCutter/logs/LogCutter.log*
- . /opt/tomcat6-logs/*.log
- . /opt/tomcat7-logs/*.log
- [cut-files] (threshold: 30960 KBs, reserve: 1024 KBs)
- . /opt/apache-logs/*_log
- . /opt/nginx-logs/*.log
- . /opt/tomcat6-logs/catalina.out
- . /opt/tomcat7-logs/catalina.out
- . /var/lib/mysql/*.err
- ------------------------------------------------------------
- > run
- manual jobs are scheduled !
- > ?
- LogCutter 1.0.2 - Bruce Liang, all rights reserved.
- ------------------------------------------------------------
- Description : schedule to DELETE and CUT text log files automatically or manually.
- Support : GB18030, UTF-8, UTF-16LE and UTF-16BE text file types.
- Usage : java com.bruce.main.LogCutter [ -f <config-file> ]
- (default config file is '/Users/Kingfisher/MyWork/Java/LogCutter/classes/../conf/config.xml')
- ------------------------------------------------------------
- > !q
- be about to shutdown, please wait ...
- shutdown perfectly !
后台运行演示（Mac 平台）：
- [Kingfisher@Bruce-mbp LogCutter] $ ./run.sh -d
- [Kingfisher@Bruce-mbp LogCutter] $
- LogCutter is running in background, use 'kill 4544' to stop me.
- [Kingfisher@Bruce-mbp LogCutter] $ kill 4544
- [Kingfisher@Bruce-mbp LogCutter] $
- !! LogCutter received terminate signal !!
- be about to shutdown, please wait ...
- shutdown perfectly !
- [Kingfisher@Bruce-mbp LogCutter] $
程序运行日志
- :52:20,705 INFO [main]: ->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->
- :52:20,706 INFO [main]: starting: class com.bruce.main.LogCutter ...
- :52:20,707 INFO [main]: configuration summary
- ------------------------------------------------------------
- [global]
- start-check-delay : 1 hours
- check-interval : 24 hours
- log4j-config-file : /Users/Kingfisher/MyWork/Java/LogCutter/classes/../conf/log4j.properties
- lock-file : /Users/Kingfisher/MyWork/Java/LogCutter/classes/../LogCutter.lock
- [delete-files] (expire: 30 days)
- . /opt/LogCutter/logs/LogCutter.log*
- . /opt/tomcat6-logs/*.log
- . /opt/tomcat7-logs/*.log
- [cut-files] (threshold: 30960 KBs, reserve: 1024 KBs)
- . /opt/apache-logs/*_log
- . /opt/nginx-logs/*.log
- . /opt/tomcat6-logs/catalina.out
- . /opt/tomcat7-logs/catalina.out
- . /var/lib/mysql/*.err
- ------------------------------------------------------------
- :52:39,062 INFO [pool-1-thread-2]: - - - - - - - -> start CutFileRunner@724646150 <- - - - - - - -
- :52:39,062 INFO [pool-1-thread-1]: - - - - - - - -> start DelFileRunner@334936591 <- - - - - - - -
- :52:39,063 INFO [pool-1-thread-2]: - - - - - - - -> end CutFileRunner@724646150 <- - - - - - - -
- :52:39,063 INFO [pool-1-thread-1]: - - - - - - - -> end DelFileRunner@334936591 <- - - - - - - -
- :52:54,222 INFO [main]: stoping: class com.bruce.main.LogCutter ...
- :52:54,222 INFO [main]: <-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-
程序配置文件（./conf/config.xml）
- <?xml version="1.0" encoding="UTF-8"?>
- <CONFIG>
- <global>
- <!-- 开始日志检查延时 (小时), 默认: 0 (立刻开始) -->
- <start-check-delay>1</start-check-delay>
- <!-- 日志检查间隔 (小时), 默认: 72 -->
- <check-interval>24</check-interval>
- <!-- Log4J 配置文件, 默认: ${CLASS_ROOT}/../conf/log4j.properties -->
- <log4j-config-file></log4j-config-file>
- <!-- 程序锁, 默认: ${CLASS_ROOT}/../${APP_NAME}.lock -->
- <lock-file></lock-file>
- </global>
- <!-- 要删除的日志文件列表 -->
- <!-- delete-files.expire: 日志文件过期时间(天), 默认: 90 -->
- <delete-files expire="30">
- <!-- files: 文件名称(不包含目录), 必须填写, 可包含通配符 -->
- <!-- files.path: 文件所在目录, 必须填写, 不能包含通配符 -->
- <file path="/opt/LogCutter/logs">LogCutter.log*</file>
- <file path="/opt/tomcat6-logs">*.log</file>
- <file path="/opt/tomcat7-logs">*.log</file>
- <!--
- <file path="/var/lib/mysql">mysql-bin.*</file>
- <file path="/var/lib/mysql">efly-test-relay-bin.*</file>
- -->
- </delete-files>
- <!-- 要截断的日志文件列表 -->
- <!-- cut-files.threshold: 日志文件截断阀值(KB), 默认: 10240 -->
- <!-- cut-files.reserve: 日志文件保留内容(KB), 默认: 1024 -->
- <!--
- <!注!> 'cut-files.reserve' 是保留内容的近似值得, 实际内容按行取整保留
- 如下列日志文件内容:
- ...... ...... ......
- line1: xxxxxxxxxxxxxxxxxxxxx
- line2: xxxxxxxxxxPyyyyyyyyyy
- line3: zzzzzzzzzzzzzzzzzzzzz
- line4: zzzzzzzzzzzzzzzzzzzzz
- ...... ...... ...... (EOF)
- 'P'为定位得到的保留起点, 程序实际会在'P'点开始查找下一个换行符,
- 从该换行符的后一个字符开始保留, 也就是从第三行开始保留到文件末尾
- -->
- <cut-files threshold="30960" reserve="1024">
- <file path="/opt/apache-logs">*_log</file>
- <file path="/opt/nginx-logs">*.log</file>
- <file path="/opt/tomcat6-logs">catalina.out</file>
- <file path="/opt/tomcat7-logs">catalina.out</file>
- <file path="/var/lib/mysql">*.err</file>
- </cut-files>
- </CONFIG>
下载试用：http://files.cnblogs.com/ldcsaa/LogCutter.zip
原文链接：http://www.cnblogs.com/ldcsaa/archive/2012/02/12/2347689.html
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