自动删除tomcat下超过7天的日志，以及tomcat目录下的log4j日志

auto-delete-tomcat-logs.sh

#!/bin/bash
#
# filename: clearExpiredTomcatLogs.sh
#
# FUNCTION: clear the expired tomcat log files
#
# -----------------增加 crontab 定时任务
# Add sys schedule:
#     crontab -e
# press "i" enter the Modify mode, and add schedule item in new-line:
# 05 00 * * * /bin/bash /software/common-shell/clearExpiredTomcatLogs.sh
# press "Esc" key to exit Modify mode, then press "Shift + :" and input "wq", press "Enter" key to exit the crontab
# -----------------

# the base directory for search the existed apache tomcat. 配置包含tomcat目录的路径，该目录或其子孙目录下存在Tomcat目录
SEARCH_DIR=/software/tomcat

# the keep days of log-files.[config value range: 2 -- 365] 配置日志保留天数
KEEP_LOGFILE_DAYS=7

API_PROJECT="gh-iu-rest-api"
C_PROJECT="gh-iu-c"
B_PROJECT="gh-iu-b"
Y_PROJECT="gh-iu-y"

# execute log for this shell 配置本脚本的执行日志文件
EXECUTE_LOG_FILE=${SEARCH_DIR}clear-expired-tomcat-logs.log

##
# write execute log 写日志信息到本脚本的执行日志文件中
writelog() {
    if [ ! -f "${EXECUTE_LOG_FILE}" ]; then
        touch ${EXECUTE_LOG_FILE}
    fi
    echo "$1">>${EXECUTE_LOG_FILE}
}

##
# remove expired log files 移除过期的日志文件（此方法为被调用方法）；可根据实际需要 在删除前 增加日志备份功能
removeExpiredLogFiles() {
    log_dir=$1
    log_file_prefix_name=$2
    log_file_ext_name=$3

    REMOVED_FILE=1

    LOG_FILE=
    LOG_FILE_NAME=
    CUR_DATE=
    for((i=${KEEP_LOGFILE_DAYS};i<=365;i++));do
        CUR_DATE=$(date +"%Y-%m-%d" --date="-$i day")
        LOG_FILE_NAME=${log_file_prefix_name}${CUR_DATE}${log_file_ext_name}
        LOG_FILE="${log_dir}/${LOG_FILE_NAME}"
		
        if [ -f "${LOG_FILE}" ]; then
            writelog "        ${LOG_FILE_NAME}"
            rm -f ${LOG_FILE}
            REMOVED_FILE=0
        fi
    done

    if [ ${REMOVED_FILE} -eq 0 ]; then
        writelog ""
    fi

    unset -v log_file_prefix_name log_file_ext_name
    unset -v LOG_FILE LOG_FILE_NAME CUR_DATE

    return ${REMOVED_FILE}
}
# 
removeExpiredLog4jFiles() {
    log_dir=$1
    log_file_prefix_name=$2 
    log_file_ext_name=$3

     REMOVED_FILE=1

    LOG_FILE=
    LOG_FILE_NAME=
    CUR_DATE=
    for((i=${KEEP_LOGFILE_DAYS};i<=365;i++));do
        CUR_DATE=$(date +"%Y-%m-%d" --date="-$i day")
		# gh-iu-rest-api.log.2017-07-20
       # LOG_FILE_NAME=${log_file_prefix_name}${CUR_DATE}${log_file_ext_name}
	   LOG_FILE_NAME=${log_file_prefix_name}${log_file_ext_name}.${CUR_DATE}
        LOG_FILE="${log_dir}/${LOG_FILE_NAME}"
		
        if [ -f "${LOG_FILE}" ]; then
            writelog "        ${LOG_FILE_NAME}"
            rm -f ${LOG_FILE}
            REMOVED_FILE=0
        fi
    done

    if [ ${REMOVED_FILE} -eq 0 ]; then
        writelog ""
    fi

    unset -v log_file_prefix_name log_file_ext_name
    unset -v LOG_FILE LOG_FILE_NAME CUR_DATE

    return ${REMOVED_FILE}
}


##
# remove the tomcat's log files 移除过期的tomcat的日志文件（此方法为被调用方法）；如有其他日志文件可增加删除条目
removeExpiredLogFilesForTomcat() {
    log_dir=$1

    # remove log-files that which is out of the keep days.
    removeExpiredLogFiles "${log_dir}" "catalina." ".log"
    a=$?

    removeExpiredLogFiles "${log_dir}" "catalina." ".out"
    b=$?

    removeExpiredLogFiles "${log_dir}" "host-manager." ".log"
    c=$?

    removeExpiredLogFiles "${log_dir}" "manager." ".log"
    d=$?

    removeExpiredLogFiles "${log_dir}" "localhost." ".log"
    e=$?
	
	removeExpiredLogFiles "${log_dir}" "localhost_access_log." ".txt"
    f=$?

	
		
    if [ ${a} -eq 1 -a ${a} -eq ${b} -a ${a} -eq ${c} -a ${a} -eq ${d} -a ${a} -eq ${e} -a ${a} -eq ${f} ]; then
        writelog "        # No expired log file"
        writelog ""
    fi

    unset -v log_dir
}


writelog "#-------------------------------------------------START"
writelog "`date +"%Y-%m-%d %A %H:%M:%S"`"
writelog "keep days for tomcat log files: $KEEP_LOGFILE_DAYS"
writelog "remove the expired tomcat log files in the following directories:"

##
# find the apache-tomcat and remove the expired log files 循环“查找匹配到 tomcat- 字样的目录和文件”
for t in `find $SEARCH_DIR -name 'tomcat-*'`
do
    # 判断是否为目录
    if [ -d "${t}/logs" ]; then
        writelog "    ${t}/logs/" ;
        removeExpiredLogFilesForTomcat "${t}/logs" ;
		# 平滑清空庞大的catalina.out文件		 	
		echo "" > "${t}/logs/catalina.out" ; 
		# 删除当前tomcat下的项目log4j日志
		removeExpiredLog4jFiles "${t}/logs/${API_PROJECT}" "${API_PROJECT}" ".log"
		removeExpiredLog4jFiles "${t}/logs/${C_PROJECT}" "${C_PROJECT}" ".log"
		removeExpiredLog4jFiles "${t}/logs/${B_PROJECT}" "${B_PROJECT}" ".log"
		removeExpiredLog4jFiles "${t}/logs/${Y_PROJECT}" "${Y_PROJECT}" ".log"
		
    fi
done

writelog "#-------------------------------------------------END"
writelog ""

unset -v SEARCH_DIR KEEP_LOGFILE_DAYS EXECUTE_LOG_FILE
unset -f writelog removeExpiredLogFiles removeExpiredLogFilesForTomcat