#!/bin/bash
#the script is backup all databases for mysql server，first grant all on *.* to adminbak@'172.16.2.222' identified by "backup";
#Setting
DBHost=172.16.2.218
DBUser=adminbak
DBPasswd=backup
BackupPath=/backup/mysqlbak/
LogFile=/backup/mysqlbak/db.log
NewFile="$BackupPath"db$(date +%y%m%d).sql.tar.gz
DumpFile="$BackupPath"db$(date +%y%m%d)
OldFile="$BackupPath"db$(date +%y%m%d --date='3 days ago').sql.tar.gz
echo "-------------------------start backup---------------------" >> $LogFile
echo "start time is $(date +"%y-%m-%d %H:%M:%S")" >> $LogFile
#Delete Old File
if [ -f $OldFile ]
then
rm -f $OldFile >> $LogFile
echo "[$OldFile]Delete Old File Success!" >> $LogFile
else
echo "[$OldFile]No Old Backup File!" >> $LogFile
fi
if [ -f $NewFile ]
then
echo "[$NewFile]The Backup File is exists,Can't Backup!" >> $LogFile
else
mysqldump -h$DBHost -u$DBUser -p$DBPasswd --all-databases > $DumpFile
tar czvf $NewFile $DumpFile >/dev/null 2>&1
echo "[$NewFile]Backup Success!" >> $LogFile
rm -rf $DumpFile
fi
echo "end time is $(date +"%y-%m-%d %H:%M:%S")" >> $LogFile
echo "--------------------------end backup----------------------" >> $LogFile