[Shell] Monitor other host oracle instance alert.log and mail

自己寫的每隔一分鐘檢測其他other hosth上的oracle instance的alert.log檔案是否有錯誤，如果有錯誤，則mail出來。
有很多地方沒有考慮到
以後多加改善

1.other host's script
[mon@oracle source]$ more mon_alert_log
#!/bin/bash
alertlog=/u01/oracle/diag/rdbms/yangxu/yangxu/trace/alert_yangxu.log
datetime=`date +"%Y/%m/%d %H:%M:%S"`
mondate=`date -d "-1min"`
logdir=/tmp
file=`echo ${alertlog##*/}`
daystr=`date +"%d"`
count=1000
grepstr="ora-|alter|not|close|open|shutdown"

echo $mondate  ,,, $file
mondate1=`echo $mondate | awk -F ":" 'BEGIN{OFS=":"}{print $1,$2}'`
mondate1_1=`echo $mondate1 | awk '{print $1,$2}'`
mondate1_2=`echo $mondate1 | awk '{print $4}'`
mondate1=${mondate1_1}" "${daystr}" "${mondate1_2}
echo "mondate1:$mondate1"

mondate2=`date | awk -F ":" 'BEGIN{OFS=":"}{print $1,$2}'`
mondate2_1=`echo $mondate2 | awk '{print $1,$2}'`
mondate2_2=`echo $mondate2 | awk '{print $4}'`
mondate2=${mondate2_1}" "${daystr}" "${mondate2_2}
echo "mondate2:$mondate2"

tail -$count $alertlog > $logdir/"$file"
firstrow=`cat $logdir/"$file" | grep -n "" | grep "$mondate1" | head -1 | cut -d ":" -f1`
echo "firstrow:$firstrow"
lastrow=`cat $logdir/"$file" | grep -n "" | grep "$mondate2" | head -1 | cut -d ":" -f1`
echo "lastrow:$lastrow"

cat /dev/null >  $logdir/"$file"_tmp
cat /dev/null >  $logdir/"$file"_tmp1

if [ -s $firstrow ];then
   echo "$datetime no alert log in $file"
   rm -rf $logdir/"$file"
   exit
fi

if [ -s $lastrow ];then
   echo "output `expr $count + 1 - $firstrow` to alert.log"
   tail -`expr $count + 1 - $firstrow` $logdir/"$file" > $logdir/"$file"_tmp
   chmod 777 $logdir/"$file"_tmp
   tmp_rowcount=`expr $count - $firstrow`
else
   echo "output1 `expr $lastrow - $firstrow` to alert.log"
   tail -`expr $count + 1 - $firstrow` $logdir/"$file"  | head -`expr $lastrow - $firstrow` > $logdir/"$file"_tmp
   chmod 777 $logdir/"$file"_tmp
   tmp_rowcount=`expr $lastrow - $firstrow`
fi

echo "tmp_rowcount:$tmp_rowcount"

rm -rf $logdir/"$file"

cat $logdir/"$file"_tmp | grep -n "" | grep "$mondate1" >> $logdir/"$file"_tmp1



2.local host script
[mon@oracle6 source]$ more mon_remote_alertlog
#!/bin/bash
logdir=/tmp
file=alert_yangxu.log
rm -rf $logdir/"$file"_tmp
rm -rf $logdir/"$file"_tmp1
ssh mon@oracle /home/mon/source/mon_alert_log
scp mon@oracle:$logdir/"$file"_tmp /tmp
scp mon@oracle:$logdir/"$file"_tmp1 /tmp
grepstr="ora-|alter|not|close|open|shutdown"

logfile=/home/mon/log/mon_remote_alertlog.log

tmp1_count=`cat $logdir/"$file"_tmp1 | wc -l`

for((j=1;j<=$tmp1_count;j++))
do

   nextj=`expr $j + 1`

   j_start=`cat $logdir/"$file"_tmp1 | head -$j | tail -1 | cut -d : -f1`
   j_end=`cat $logdir/"$file"_tmp1 | head -$nextj | tail -1 | cut -d : -f1`
   if [ $j -eq $tmp1_count ];then
      j_end=`cat $logdir/"$file"_tmp | wc -l`
      j_end=`expr $j_end + 1`
   fi

   j_row=`expr $j_end - $j_start`
 
   headrow=`expr $j_end - 1`
   warn_count=`cat $logdir/"$file"_tmp | head -$headrow | tail -$j_row | egrep -i "$grepstr"  | wc -l`

   if [ $warn_count -gt 0 ];then
      cat $logdir/"$file"_tmp | head -$headrow | tail -$j_row >> $logfile
      cat $logdir/"$file"_tmp | head -`expr $j_end - 1` | tail -$j_row | mutt -s "[YangXu]Oracle Database Alert Log Warning" tolilong@163.com
      echo "==============================================================================" >> $logfile
   fi
done

#rm -rf $logdir/"$file"_tmp
#rm -rf $logdir/"$file"_tmp1


[mon@oracle6 source]$ crontab -l
###############mon other host oracle alert.log###########
* * * * * /home/mon/source/mon_remote_alert_log >> /home/mon/log/mon_remote_alertlog.log