運維記錄 - 業務日誌清理功能

 

線上某些系統業務跑一段時間後，日誌就會愈來愈多，考慮到業務機器磁盤有限，須要添加業務日誌清理功能。根據日誌所在分區磁盤使用狀況來判斷是否清理日誌，好比當日志分區磁盤空間使用超過90%時，將一週前的日誌打包轉移到別處 (別的分區下或遠程存儲設備上)。腳本 (/opt/script/log_clear.sh) 以下:

#!/bin/bash

#定義日誌所在分區當前空間所佔比例數(去掉%)。grep -w表示精準匹配，只匹配"/"這個分區
LOG_PARTITION=$(`which df` -h|awk '{print $5,$6}'|grep -w "/"|cut -d" " -f1|awk -F"%" '{print $1}')
#定義一週前的日期，用於日誌分區空間超過設定的閾值後保留的份數(這裏保留一週的日誌)
KEEP_DATE=`date -d '-7 days' +%Y%m%d`
#定義日誌路徑
LOG_DIR=/opt/log/kevin
#定義日誌備份路徑(即當日志分區空間超過閾值後，將日誌轉移到該處。這裏就轉移到了本地home分區下，也能夠轉移到別的機器或遠程存儲設備上)
LOG_BACK_DIR=/home/log/kevin

#確保日誌備份路徑存在，若是不存在，則建立該路徑。
if [ ! -d ${LOG_BACK_DIR} ];then
   `which mkdir` -p ${LOG_BACK_DIR}
else
   echo "${LOG_BACK_DIR} is exist" >/dev/null 2>&1
fi

#當日志分區當前空間超過90%時執行的動做
if [ ${LOG_PARTITION} -ge 90 ];then
   
   #切換到日誌路徑下
   cd ${LOG_DIR}
   #截取日誌文件中的日期，好比stepweb_20190915.log日誌文件，則截取20190915
   for LOG_DATE in $(ls -l ${LOG_DIR}|awk '{print $9}'|cut -d"_" -f2|awk -F"." '{print $1}')
   do
     #當日志文件中截取的日期是一週以前的日誌時執行的動做
     if [ ${LOG_DATE} -lt ${KEEP_DATE} ];then
       #打包，轉移，刪除
       #注意這裏tar使用-P參數，由於tar默認爲相對路徑，使用絕對路徑的話會報錯"Removing leading `/’ from member names",使用-P參數就解決了該問題
       `which tar` -zvPcf ${LOG_DIR}/stepweb_${LOG_DATE}.log.tar.gz ${LOG_DIR}/stepweb_${LOG_DATE}.log
       mv ${LOG_DIR}/stepweb_${LOG_DATE}.log.tar.gz ${LOG_BACK_DIR}/
       rm -rf ${LOG_DIR}/stepweb_${LOG_DATE}.log
     else
       echo "keep stepweb_${LOG_DATE}.log" >/dev/null 2>&1
     fi
   done
else
   echo "${LOG_PARTITION} is available" >/dev/null 2>&1
fi

根據上面腳本驗證下：

查看本機磁盤使用狀況，日誌所在分區磁盤當前使用率達到92%了
[root@yyweb kevin]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G  46G   4G     92% /
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G     0  3.9G   0% /dev/shm
tmpfs                    3.9G   34M  3.8G   1% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1               1014M  183M  832M  19% /boot
/dev/mapper/centos-home  142G   33M  142G   1% /home

日誌所在路徑
[root@yyweb kevin]# pwd
/opt/log/kevin

日誌狀況
[root@yyweb kevin]# ls
stepweb_20190810.log  stepweb_20190817.log  stepweb_20190824.log  stepweb_20190901.log  stepweb_20190908.log  stepweb_20190915.log
stepweb_20190811.log  stepweb_20190818.log  stepweb_20190825.log  stepweb_20190902.log  stepweb_20190909.log  stepweb_20190916.log
stepweb_20190812.log  stepweb_20190819.log  stepweb_20190826.log  stepweb_20190903.log  stepweb_20190910.log  stepweb_20190917.log
stepweb_20190813.log  stepweb_20190820.log  stepweb_20190827.log  stepweb_20190904.log  stepweb_20190911.log  stepweb_20190918.log
stepweb_20190814.log  stepweb_20190821.log  stepweb_20190828.log  stepweb_20190905.log  stepweb_20190912.log  stepweb_20190919.log
stepweb_20190815.log  stepweb_20190822.log  stepweb_20190829.log  stepweb_20190906.log  stepweb_20190913.log
stepweb_20190816.log  stepweb_20190823.log  stepweb_20190830.log  stepweb_20190907.log  stepweb_20190914.log

[root@yyweb kevin]# ls /home/
[root@yyweb kevin]# 

執行日誌清理腳本
[root@yyweb kevin]# sh /opt/script/log_clear.sh 
/opt/log/kevin/stepweb_20190810.log
/opt/log/kevin/stepweb_20190811.log
/opt/log/kevin/stepweb_20190812.log
/opt/log/kevin/stepweb_20190813.log
/opt/log/kevin/stepweb_20190814.log
/opt/log/kevin/stepweb_20190815.log
/opt/log/kevin/stepweb_20190816.log
/opt/log/kevin/stepweb_20190817.log
/opt/log/kevin/stepweb_20190818.log
/opt/log/kevin/stepweb_20190819.log
/opt/log/kevin/stepweb_20190820.log
/opt/log/kevin/stepweb_20190821.log
/opt/log/kevin/stepweb_20190822.log
/opt/log/kevin/stepweb_20190823.log
/opt/log/kevin/stepweb_20190824.log
/opt/log/kevin/stepweb_20190825.log
/opt/log/kevin/stepweb_20190826.log
/opt/log/kevin/stepweb_20190827.log
/opt/log/kevin/stepweb_20190828.log
/opt/log/kevin/stepweb_20190829.log
/opt/log/kevin/stepweb_20190830.log
/opt/log/kevin/stepweb_20190901.log
/opt/log/kevin/stepweb_20190902.log
/opt/log/kevin/stepweb_20190903.log
/opt/log/kevin/stepweb_20190904.log
/opt/log/kevin/stepweb_20190905.log
/opt/log/kevin/stepweb_20190906.log
/opt/log/kevin/stepweb_20190907.log
/opt/log/kevin/stepweb_20190908.log
/opt/log/kevin/stepweb_20190909.log
/opt/log/kevin/stepweb_20190910.log
/opt/log/kevin/stepweb_20190911.log
/opt/log/kevin/stepweb_20190912.log

日誌清理後，日誌路徑下只保留了最近一週的日誌
[root@yyweb kevin]# ls
stepweb_20190913.log  stepweb_20190915.log  stepweb_20190917.log  stepweb_20190919.log
stepweb_20190914.log  stepweb_20190916.log  stepweb_20190918.log

一週以前的日誌被打包轉移到/home/log/kevin下了
[root@yyweb kevin]# ls /home/log/kevin/
stepweb_20190810.log.tar.gz  stepweb_20190817.log.tar.gz  stepweb_20190824.log.tar.gz  stepweb_20190901.log.tar.gz  stepweb_20190908.log.tar.gz
stepweb_20190811.log.tar.gz  stepweb_20190818.log.tar.gz  stepweb_20190825.log.tar.gz  stepweb_20190902.log.tar.gz  stepweb_20190909.log.tar.gz
stepweb_20190812.log.tar.gz  stepweb_20190819.log.tar.gz  stepweb_20190826.log.tar.gz  stepweb_20190903.log.tar.gz  stepweb_20190910.log.tar.gz
stepweb_20190813.log.tar.gz  stepweb_20190820.log.tar.gz  stepweb_20190827.log.tar.gz  stepweb_20190904.log.tar.gz  stepweb_20190911.log.tar.gz
stepweb_20190814.log.tar.gz  stepweb_20190821.log.tar.gz  stepweb_20190828.log.tar.gz  stepweb_20190905.log.tar.gz  stepweb_20190912.log.tar.gz
stepweb_20190815.log.tar.gz  stepweb_20190822.log.tar.gz  stepweb_20190829.log.tar.gz  stepweb_20190906.log.tar.gz
stepweb_20190816.log.tar.gz  stepweb_20190823.log.tar.gz  stepweb_20190830.log.tar.gz  stepweb_20190907.log.tar.gz

                                                                                                                              
再貼一個簡單的日誌處理腳本

#!/usr/bin/sh
#根據系統/服務/日誌保留天數三個參數壓縮日誌
#usage: sh clearlog.sh sysname appname keepdays
sysName=$1
appName=$2
keepDay=$3
logDir=/var/log/${sysName}/${appName}
logFile=${appName}.log
cd ${logDir}
find ./ -name "${logFile}.*[0-9][0-9]" -mtime +${keepDay} -exec gzip {} \;