SVN自动备份脚本和设置方法

脚本：

# FILE_NAME : svn_daily_bak.sh
#
# DESCRIPTION: this script is  write to backup svn every day
#
# AUTHOR : khls27
#
# DATE : 2015-12-30


#PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
#export PATH

SVN_PATH=/svn/repository
SVN_BAK_PATH=/opt/data/SVNbackup/svndumps
BAK_CONFIG=/opt/data/SVNbackup/config.inf

# log file, ring buf. svnbackup2 is current log file and svnbackup1 is the history log file
LOG_FILE_R1=/opt/data/SVNbackup/svnbackup1.log
LOG_FILE_R2=/opt/data/SVNbackup/svnbackup2.log


function print_log()
{
    if [ ! -f $LOG_FILE_R2 ] ;then
        touch $LOG_FILE_R2
    fi

    size=$(ls -l $LOG_FILE_R2 | awk '{ print $5 }')

    if [ $size -gt 20480 ] ;then
        mv $LOG_FILE_R2 $LOG_FILE_R1
        echo "" > $$LOG_FILE_R2
    fi

    echo "[$(date +%Y%m%d%H%M)] $1" >> $$LOG_FILE_R2
}


function do_full_backup()
{
    bakdir="$SVN_BAK_PATH/$(date +%Y%m%d)-full"
    mkdir -p $bakdir
    newest_rev=$(svnlook youngest $SVN_PATH)

    print_log "start to do a full svn backup"
    svnadmin dump $SVN_PATH | bzip2 | tee $bakdir/fulldump$(date +%Y%m%d).bz2 | md5sum > $bakdir/fulldump$(date +%Y%m%d).md5
    print_log "full svn backup DONE    !"

    if [ -f $BAK_CONFIG ] ;then
        sed -i "s/^LAST_BACKED_REV.*/LAST_BACKED_REV=$newest_rev/g" $BAK_CONFIG
    else
        echo "LAST_BACKED_REV=$newest_rev" > $BAK_CONFIG
    fi
}

function do_incremental_backup()
{
    last_rev=0
    newest_rev=$(svnlook youngest $SVN_PATH)

    if [ -f $BAK_CONFIG ] ;then
        last_rev=$(grep "LAST_BACKED_REV" $BAK_CONFIG | awk -F '=' '{print $2}')

        if [ $last_rev -eq $newest_rev ] ;then
            print_log "last backuped reversion is equal to newest"
        fi
    fi

    bakdir="$SVN_BAK_PATH/$(date +%Y%m%d)-r$last_rev-r$newest_rev"
    mkdir -p $bakdir

    print_log "start to do a incremental svn backup from $last_rev to $newest_rev"
    svnadmin dump $SVN_PATH -r $last_rev:$newest_rev --incremental | bzip2 | tee $bakdir/incdump$(date +%Y%m%d).bz2 | md5sum > $bakdir/incdump$(date +%Y%m%d).md5
    print_log "incremental svn backup from $last_rev to $newest_rev DONE!"

    print_log "try update LAST_BACKED_REV to $newest_rev"

    if [ -f $BAK_CONFIG ] ;then
        sed -i "s/^LAST_BACKED_REV.*/LAST_BACKED_REV=$newest_rev/g" $BAK_CONFIG
    else
        echo "LAST_BACKED_REV=$newest_rev" > $BAK_CONFIG
    fi
}

# main start
week=$(date | awk '{print $1}')

# only do full backup on Sat.
if [ $week == "Sat" ] ;then
    do_full_backup
else
    do_incremental_backup
fi


# delete 30-days-ago svndump backup
folder=`ls -ltr $SVN_BAK_PATH | grep -v total | awk {'print $9'}`
declare -i linenum=`ls -ltr $SVN_BAK_PATH | grep -v total | wc -l`
declare -i c=$linenum-30
declare -i count=0

if [ "$c" -gt "0" ]
then
for file in $folder
do
    count=count+1
    if [ "$count" -le "$c" ]
    then
    print_log "$file, 30 days before, will be deleted now!"
    rm -rf $SVN_BAK_PATH/$file
    fi
done
fi

# upload svndump file to ftp server, redundancy backup
print_log "start to upload newest backup file to ftp server"
lftp -u ftpuser,private  192.168.26.74 -e "mirror -R --only-newer $SVN_BAK_PATH svn-bk ; quit"
print_log "newest backup file upload to ftp server DONE!"

print_log "all backup DONE!"
print_log ""
exit 0

脚本开始部分，配置SVN库目录，备份目录和日志目录，请修改为自己的目录。

设置定期启动任务，采用ubuntu自带的crontab
crontab -e
0 2 * * * * bash /home/xxx/bin/svn_daily_bak.sh