#!/bin/sh
#victory chen
 
INNOBACKUPEX=innobackupex
INNOBACKUPEXFULL=/usr/bin/$INNOBACKUPEX
TODAY=`date +%Y%m%d%H%M%S`
USEROPTIONS="--user=root --password=root"
TMPFILE="/logs/mysql/innobackup_$TODAY.$$.tmp"
TMPFILEDIR="/logs/mysql/"
MYCNF=/etc/my.cnf
MYSQL=/usr/bin/mysql
MYSQLADMIN=/usr/bin/mysqladmin
BACKUPDIR=/backup 
# 備份的主目錄
FULLBACKUPDIR=$BACKUPDIR/full 
INCRBACKUPDIR=$BACKUPDIR/incr # 增量備份的目錄
# 全庫備份的目錄

# Grab start time
#############################################################################
# Display error message and exit
#############################################################################
error()
{
    echo "$1" 1>&2
    exit 1
}
 
# Check options before proceeding
if [ ! -x $INNOBACKUPEXFULL ]; then
  error "$INNOBACKUPEXFULL does not exist."
fi
 
if [ ! -d $BACKUPDIR ]; then
  error "Backup destination folder: $BACKUPDIR does not exist."
fi
 
if [ -z "`$MYSQLADMIN $USEROPTIONS status | grep 'Uptime'`" ] ; then
 error "HALTED: MySQL does not appear to be running."
fi
 
if ! `echo 'exit' | $MYSQL -s $USEROPTIONS` ; then
 error "HALTED: Supplied mysql username or password appears to be incorrect (not copied here for security, see script)."
fi

# Some info output
echo "----------------------------"
echo
echo "$0: MySQL backup script"
echo "started: `date`"
echo
 
# Create full and incr backup directories if they not exist.

if [ ! -d $FULLBACKUPDIR ]; then
        mkdir -pv $FULLBACKUPDIR
fi

if [ ! -d $TMPFILEDIR ];then
        mkdir -pv $TMPFILEDIR
fi

# find latest backup file

LATEST_FULL=`find $FULLBACKUPDIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"`
echo "LATEST_FULL=$LATEST_FULL" 
# TMPINCRDIR 以全域性備份的名字作為目錄存放增量備份
TMPINCRDIR=$INCRBACKUPDIR/$LATEST_FULL  #/backup/incr/2018-08-12_23-06-00
Fathername=`basename $TMPINCRDIR`
mkdir -p $TMPINCRDIR
BACKTYPE="incr"
# Find latest incremental backup.
LATEST_INCR=`find $TMPINCRDIR -mindepth 1 -maxdepth 1 -type d | sort -nr | head -1`
echo "LATEST_INCR=$LATEST_INCR"
#找最近一次增量備份 如果沒有就基於全量備份之上做增量備份
if [ ! $LATEST_INCR ] ; then
   INCRBASEDIR=$FULLBACKUPDIR/$LATEST_FULL
else
   INCRBASEDIR=$LATEST_INCR
fi
echo "Running new incremental backup using $INCRBASEDIR as base."
  
innobackupex --defaults-file=$MYCNF $USEROPTIONS --incremental $TMPINCRDIR  --incremental-basedir $INCRBASEDIR > $TMPFILE 2>&1
 
 

 # 如果這裡獲取這次備份的目錄  但是這裡使用打包的方法 獲取到的不是 #/backup/2018-08-11_23-28-46而是/backup是一個目錄 顯示的不是檔案無法判斷檔案是否建立成功 所以用下面的方法
THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPFILE`

if [ $? = 0 ] 
  then
  echo "THISBACKUP=$THISBACKUP"
  Filename=`basename $THISBACKUP`  #2018-08-13_02-25-18
  echo "Filename=$Filename"
  echo "Databases backed up successfully to: $THISBACKUP"
else
  echo "backup failed"
fi

if [ -n "`tail -1 $TMPFILE | grep 'completed OK!'`" ] ; then
 echo "$INNOBACKUPEX succeed:"
else
 echo "---------- ERROR OUTPUT from $INNOBACKUPEX ----------"
# cat $TMPFILE
rm -f $TMPFILE
 exit 1
fi

  
  cd $TMPINCRDIR
  tar -czvf -  $Filename  | openssl des3 -salt -k 123456 -out $TMPINCRDIR/$Filename.tar.gz
  # tar -zcvf $TODAY.tar.gz ./full/ 
  scp -P 22 $TMPINCRDIR/$Filename.tar.gz [email protected]:/backup/$Fathername/$Filename.tar.gz
  # rm -rf $FULLBACKUPDIR

  if [ $? = 0 ] 
  then
    echo "scp succeed"
    # rm -rf $BACKUPDIR/full 
  else
    echo "Error with scp."
  fi

exit 0