脚本功能：

系统环境：SUSE Linux Server 11.3 X64

1. 数据库进程检测重启。

2. 数据库备份压缩脚本。
   

#### Check DB Process Script ####

#!/bin/sh

YEAR=`date +%Y`

MON=`date +%m`

DAY=`date +%d`

HOUR=`date +%H`

MIN=`date +%M`

echo "$YEAR-$MON-$DAY $HOUR:$MIN" > /opt/pgdb/cron/dbstatus.log

servName="postmaster"

DBSTAT=`ps -ef|grep $servName|grep -v 'grep'`

if [ "$DBSTAT" == "" ];

then

echo "testdb DB is down" >> /opt/pgdb/cron/dbstatus.log

echo "testdb database is down"|mailx -s "testdb DB down" user01@baidu.com

DBstus=`ps -ef|grep $servName|grep -v 'grep'`

while [ "$DBstus" == "" ];

do

if ["$DBstus" == ""];

then

echo "DB starting ..." >> /opt/pgdb/cron/dbstatus.log

/etc/init.d/postgresql start

DBstus=`ps -ef|grep $servName|grep -v 'grep'`

else

echo "testdb DB already running."

fi

done

else

echo "testdb DB is running." >> /opt/pgdb/cron/dbstatus.log

fi

#### Backup DB Script ####

#!/bin/bash

export PATH=$PATH:/usr/local/pgsql/bin

DATE=`date +%Y_%m_%d_%H`

YESDAY=`date -d "yesterday" +%Y_%m_%d_%H`

TWODAGO=`date -d "3 day ago" +%Y_%m_%d_%H`

del_file_3ago() {

#### delete 3 day ago backup file ####

PGHOME="/home/postgres"

cd $PGHOME

echo "Dir list before delete 3 day ago backup file: "

ls -lrt

TDAFILE="testdb_"$TWODAGO".bak.tar.gz"

echo "Detele 3 Day ago file: "$TDAFILE

rm "$TDAFILE"

echo "Dir list after delete 3 day ago backup file: "

ls -lrt

}

process_yesterday_bak() {

#### Compress and remove yesterday bak file####

PGHOME="/home/postgres"

cd $PGHOME

COMFILE="testdb_"$YESDAY".bak.tar.gz"

YDFILE="testdb_"$YESDAY".bak"

echo "tar zcvf $COMFILE $YDFILE"|sh

echo "General yesterday tar file: "$COMFILE

rm "$YDFILE"

echo "delete yesterday file: "$YDFILE

echo "Dir list After tar yesterday backup file: "

ls -lrt

}

#### Backup testdb database ####

echo $DATE

echo "Starting backup database: testdb ...."

echo "">/home/postgres/pgbk_fail.txt

su - postgres -c "pg_dump testdb > /home/postgres/testdb_$DATE.bak 2>/home/postgres/pgbk_fail.txt"

grep Failed /home/postgres/pgbk_fail.txt

if [ $? -eq 0 ]

then

echo "Database testdb backup Failed!"

else

echo "Database testdb backup Successful!"

del_file_3ago

process_yesterday_bak

fi

echo "Dir list After backup database testdb: "

ls -lrt