[oracle@sdk31 ~]$ cat /home/oracle/scripts/check_db_lis.sh
#!/bin/bash
#set -x
#这里导入环境变量，避免Crontab执行时不能执行Oracle下的一些命令
export ORACLE_HOME=/oracle/product/10.2.0/db_1
export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
export ORACLE_BASE=/oracle
export PATH=$ORACLE_HOME/bin:$PATH
export ORACLE_SID=dbcc
#这是操作系统安装mailx后的mailx的配置，这是我申请的发送邮箱
#/etc/mail/rc
#set smtp=smtp.126.com
#set from=dbabio@126.com
#set smtp-auth-user=dbabio@126.com smtp-auth-password=xxxxxx smtp-auth=login

#配置发件人和相关系统变量
mail_receive="xxxxxxxxxxx@qq.com"time=`date +%Y%m%d_%H:%M:%S`
hostname="192.168.0.31"
time=`date +‘%Y-%m-%d %H:%M:%S‘`
ORATAB=/etc/

#或者数据库实例名以及pmon进程和监听进程，可以检查进程数量判断服务是否终止
sid=`cat /etc/oratab | grep -v "^#"| grep -v "^$"|cut -f1 -d ":"`
pmon_pid=`ps -ef | grep pmon| grep -v grep`
listener_num=`ps -ef | grep LISTENER|grep -v grep | wc -l`

#定义一些邮件的标题、内容等信息，比较繁琐，有待简化
title_dbs="Oracle_${hostname}_${time}_Instance_Down!!Alert!!"
title_dbsok="Oracle_${hostname}_${time}_Instance_RecoverOK!!"
title_dbsno="Oracle_${hostname}_${time}_Instance_RecoverFail!!"

title_lis="Oracle_${hostname}_${time}_Listener_Down!!Alert!!"
title_lisok="Oracle_${hostname}_${time}_Listener_RecoverOK!!"
title_lisno="Oracle_${hostname}_${time}_Listener_RecoverFail!!"

contents_db="Oracle Instance Down!! Please check!! Script will try to startup-- [[`date`]]"
contents_dbok="Minutes before,Oracle Instance Down,But now it works ok Please check!! -- [[`date`]]"
contents_dbno="Minutes before,Oracle Instance Down,But now it can‘t start remained!##! Please check!! -- [[`date`]]"

contents_lis="Oracle Listener Down!! Please check!! Script will try to startup-- [[`date`]]"
contents_lisok="Minutes before,Oracle Listener Down,But now it works ok Please check!!-- [[`date`]]"
contents_lisno="Minutes before,Oracle Listener Down,But now it can‘t start remained!##! Please check!!-- [[`date`]]"
#定义主要的日志文件，可作为邮件的附件发送
alert_log="/oracle/admin/dbcc/bdump/alert_dbcc.log"
listener_log="/oracle/product/10.2.0/db_1/network/log/listener.log"

#监听监控函数
listener_monit()
{
if [ $listener_num = 0 ]
then
  echo ${contents_lis} | mailx -v -s "${title_lis}" ${mail_receive} >/dev/null 2>&1
  echo "${time}|${hostip}|oracle|down:listener"
  echo "Listener down! Now will start it ............"
  lsnrctl start >/dev/null
  sleep 2
  echo "Listener had started ..........."
   listener_num_2=`ps -ef | grep LISTENER|grep -v grep | wc -l`
   if [ $listener_num_2 = 1 ]
     then
       echo ${contents_lisok} | mailx -v -s "${title_lisok}" ${mail_receive} >/dev/null 2>&1
     else
       echo ${contents_lisno} | mailx -v -s "${title_lisno}" ${mail_receive} >/dev/null 2>&1
   fi
  elif [ $listener_num = 1 ]
    then
     echo "${time}|${hostip}|oracle|running:listener"
fi
}
#数据库实例监控函数
instance_monit()
{
for dbname in $sid;do
  echo "$pmon_pid" | grep "ora_pmon_$sid" >/dev/null 2>&1
if (( $? ))
then
  echo "${time}|${hostip}|oracle|down:$dbname"
  echo ${contents_db} | mailx -v -a ${alert_log} -s "${title_dbs}" ${mail_receive} >/dev/null 2>&1
  echo "Instance down! Now will start it ............"
sqlplus /nolog<<EOF
connect / as sysdba
startup
EOF
sleep 5
echo "Instance had started ..........."
    db_number=`ps -ef | grep ‘ora_pmon_dbcc‘ | grep -v grep| wc -l`
    if [ $db_number -ne 0 ]
     then
      echo ${contents_dbok} | mailx -v -a ${alert_log} -s "${title_dbsok}" ${mail_receive} >/dev/null 2>&1
     else
      echo ${contents_dbno} | mailx -v -a ${alert_log} -s "${title_dbsno}" ${mail_receive} >/dev/null 2>&1
    fi
else
echo "${time}|${hostip}|oracle|running:$dbname"
fi
done
}
listener_monit

echo "--------------------------------------------------------"

instance_monit