Data Guard Switchover Unix Shell Script _ Oracle DBA – Tips and Techniques

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Data Guard Switchover Unix shell script

The following Unix shell scripts can be used to automate the Data Guard Switchover process of a physical standby database.

It is very important that the scripts are run in the correct order and on right machine.

These scripts are based on a few customisations. The *.sh scripts are located in a directory called /var/opt/oracle/dataguard and there is another file calledset$ORACLE_SID which is located under /var/opt/oracle/cronjobs. This script sets the environment for the individual Oracle instance like the $ORACLE_SID and the$ORACLE_HOME.

On the machine where the Primary Database is running we need to run the following scripts

$ cd /var/opt/oracle/dataguard$ ./pre_switchover_check.sh$ ./make_me_standby.sh

On the machine where the Standby Database is running we need to run the following script:

$ cd /var/opt/oracle/dataguard$ ./make_me_primary.sh

After the switchover is completed, we need to run the following script on the machine where the former Primary (now new Standby) database is running:

$ cd /var/opt/oracle/dataguard$ ./start_recovery.sh

pre_switchover_check.sh

!/bin/ksh

if [ "$1" = "" ]

then

echo ""

echo "##################################################################"

echo "# PLEASE ENTER ORACLE_SID AS THE FIRST COMMAND LINE ARGUMENT #"

echo "# SCRIPT USAGE : pre_switchover_check.sh #"

echo "##################################################################"

echo ""

exit

fi

ORACLE_SID=`echo $1 |tr '[A-Z]' '[a-z]'`; export ORACLE_SID;

ls -l /var/opt/oracle/cronjobs/set$ORACLE_SID > /dev/null

if [ $? != 0 ]

then

echo ""

Data Guard Switchover Unix shell script Oracle DBA Tips and Techniques http://gavinsoorma.com/2009/07/870/

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echo "##################################################################"

echo "# ENVIRONMENT SETTING SET FILE NOT FOUND...!!! #"

echo "# /var/opt/oracle/cronjobs/set$ORACLE_SID #"

echo "##################################################################"

echo ""

exit

fi

. /var/opt/oracle/cronjobs/set$ORACLE_SID

DB=`echo $1 |tr '[a-z]' '[A-Z]'`; export DB;

echo ""

echo "##################################################################"

echo "# PERFORMING PRE-SWITCHOVER CHECKS FOR $DB #"

echo "##################################################################"

echo ""

sqlplus -s /nolog |&

print -p "connect / as sysdba"

print -p "set feedback off pause off pagesize 0 heading off verify off linesize 500 term off "

print -p "set sqlprompt ''"

read -p JUNK

print -p "SELECT DATABASE_ROLE DBROLE FROM V\$DATABASE;"

read -p DBROLE

print -p "SELECT COUNT(FILE#) FILESTAT FROM V\$DATAFILE WHERE STATUS IN ('RECOVER', 'OFFLINE');"

read -p FILESTAT

print -p "SELECT COUNT(FILE#) BKPSTAT FROM V\$BACKUP WHERE STATUS = 'ACTIVE';"

read -p BKPSTAT

print -p "SELECT LOG_ARCHIVED-LOG_APPLIED LOGGAP

FROM (SELECT MAX(SEQUENCE#) LOG_ARCHIVED

FROM V\$ARCHIVED_LOG WHERE DEST_ID=1 AND ARCHIVED='YES'

AND RESETLOGS_CHANGE#=(SELECT MAX(RESETLOGS_CHANGE#)

FROM V\$ARCHIVED_LOG)),

(SELECT MAX(SEQUENCE#) LOG_APPLIED

FROM V\$ARCHIVED_LOG WHERE DEST_ID=2

AND APPLIED='YES'

AND RESETLOGS_CHANGE#=(SELECT MAX(RESETLOGS_CHANGE#) FROM V\$ARCHIVED_LOG)) ;"

read -p LOGGAP

print -p "EXIT"

echo "CHECKING CURRENT DATABASE ROLE..."

if [ "$DBROLE" = "PHYSICAL STANDBY" ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! NOT A PRIMARY DATABASE, PLEASE RUN IT ON PRIMARY #"

echo "##################################################################"

echo ""

exit

else


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echo ""

echo " OK "

echo ""

fi

echo "CHECKING LOG GAP BETWEEN PRIMARY & STANDBY..."

if [ $LOGGAP -ne 0 ]

then

echo ""

echo "######################################################################"

echo "# ERROR ! ! ! PRIMARY & STANDBY ARE NOT IN SYNC, LOG GAP = $LOGGAP #"

echo "######################################################################"

echo ""

exit

else

echo ""

echo " OK "

echo ""

fi

echo "CHECKING FILES OFFLINE OR RECOVER STATUS..."

if [ $FILESTAT -ne 0 ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! ONE OR MORE FILE/S OFFLINE OR IN RECOVER STATUS #"

echo "##################################################################"

echo ""

exit

else

echo ""

echo " OK "

echo ""

fi

echo "CHECKING FILES IN BACKUP MODE..."

if [ $BKPSTAT -ne 0 ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! ONE OR MORE FILE/S ARE IN BACKUP MODE #"

echo "##################################################################"

echo ""

exit

else

echo ""

echo " OK "

echo ""


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fi

echo ""

echo "##################################################################"

echo "# ALL PRE-SWITCHOVER CHECKS SUCCEEDED... PROCEED WITH SWITCHOVER #"

echo "##################################################################"

echo ""

make_me_standby.sh

#!/bin/ksh

if [ "$1" = "" ]

then

echo ""

echo "##################################################################"


echo "# SCRIPT USAGE : make_me_standby.sh #"

echo "##################################################################"

echo ""

exit

fi



if [ $? != 0 ]

then

echo ""

echo "##################################################################"



echo "##################################################################"

echo ""

exit

fi





print -p "set feedback off pause off pagesize 0 heading off verify off linesize 500 term off"


read -p JUNK


read -p DBROLE

print -p "SELECT COUNT(FILE#) FILESTAT FROM V\$DATAFILE WHERE STATUS IN ('RECOVER', 'OFFLINE');"


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read -p FILESTAT

print -p "SELECT COUNT(FILE#) BKPSTAT FROM V\$BACKUP WHERE STATUS = 'ACTIVE';"

read -p BKPSTAT

print -p "SELECT LOG_ARCHIVED-LOG_APPLIED LOGGAP

FROM (SELECT MAX(SEQUENCE#) LOG_ARCHIVED

FROM V\$ARCHIVED_LOG WHERE DEST_ID=1 AND ARCHIVED='YES'

AND RESETLOGS_CHANGE#=(SELECT MAX(RESETLOGS_CHANGE#)

FROM V\$ARCHIVED_LOG)),

(SELECT MAX(SEQUENCE#) LOG_APPLIED

FROM V\$ARCHIVED_LOG WHERE DEST_ID=2

AND APPLIED='YES'

AND RESETLOGS_CHANGE#=(SELECT MAX(RESETLOGS_CHANGE#) FROM V\$ARCHIVED_LOG)) ;"

read -p LOGGAP

print -p "EXIT"

if [ "$DBROLE" = "PHYSICAL STANDBY" ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! NOT A PRIMARY DATABASE, PLEASE RUN IT ON PRIMARY #"

echo "##################################################################"

echo ""

exit

fi

if [ $LOGGAP -ne 0 ]

then

echo ""

echo "######################################################################"

echo "# ERROR ! ! ! PRIMARY & STANDBY ARE NOT IN SYNC, LOG GAP = $LOGGAP #"

echo "######################################################################"

echo ""

exit

fi

echo "CHECKING FILES OFFLINE OR RECOVER STATUS..."

if [ $FILESTAT -ne 0 ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! ONE OR MORE FILE/S OFFLINE OR IN RECOVER STATUS #"

echo "##################################################################"

echo ""

exit

fi

if [ $BKPSTAT -ne 0 ]

then


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echo ""

echo "##################################################################"

echo "# ERROR ! ! ! ONE OR MORE FILE/S ARE IN BACKUP MODE #"

echo "##################################################################"

echo ""

exit

fi

echo ""

echo "##################################################################"

echo "# ALL PRE-SWITCHOVER CHECKS SUCCEEDED... #"

echo " SWITCHING $DB TO STANDBY ROLE, PLEASE CONFIRM ... "

echo "##################################################################"

echo ""

echo ""

echo "Continue? - Please enter 'Y' to proceed & 'N' to exit"

read ans

if [ "$ans" = 'Y' -o "$ans" = 'y' ]

then

sqlplus -s /nolog < /tmp/make_me_standby.log

connect / as sysdba;

startup force;

alter database commit to switchover to standby with session shutdown;

shutdown immediate;

startup nomount;

alter database mount standby database;

select database_role from v\$database;

EOF

cat /tmp/make_me_standby.log

$ORACLE_HOME/bin/lsnrctl stop PRIMARY_$DB

else

echo "Quitting ....."

exit

fi

echo ""

echo "####################################################################"

echo "# PLEASE CONFIRM THAT THE STATUS OF DATABASE IS NOW "STANDBY" #"

echo "# #"

echo "# On OLD STANDBY Host please run the following script: #"

echo "# /var/opt/oracle/dataguard/make_me_primary.sh #"

echo "####################################################################"

echo ""

make_me_primary.sh

#!/bin/ksh

if [ "$1" = "" ]


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then

echo ""

echo "##################################################################"


echo "# SCRIPT USAGE : make_me_primary.sh #"

echo "##################################################################"

echo ""

exit

fi



if [ $? != 0 ]

then

echo ""

echo "##################################################################"



echo "##################################################################"

echo ""

exit

fi







read -p JUNK


read -p DBROLE

print -p "exit"

if [ "$DBROLE" = "PRIMARY" ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! NOT STANDBY DATABASE, PLEASE RUN IT ON STANDBY #"

echo "##################################################################"

echo ""

exit

fi

echo ""

echo "##################################################################"


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echo "# SWITCHING $DB TO PRIMARY ROLE, PLEASE CONFIRM ... #"

echo "##################################################################"

echo ""


read ans

if [ "$ans" = 'Y' -o "$ans" = 'y' ]

then

sqlplus -s /nolog < /tmp/make_me_primary.log


alter database commit to switchover to primary with session shutdown;

shutdown immediate;

startup mount;

alter system set log_archive_dest_state_2=enable scope=both;

alter database set standby database to maximize performance;

alter database open;

select database_role from v\$database;

EOF

cat /tmp/make_me_primary.log

$ORACLE_HOME/bin/lsnrctl start PRIMARY_$DB

else


exit

fi

echo "####################################################################"

echo "# PLEASE CONFIRM THAT THE STATUS OF DATABASE IS NOW "PRIMARY" #"

echo "# #"

echo "# On NEW STANDBY Host please run the following script: #"

echo "# /var/opt/oracle/dataguard/start_recovery.sh #"

echo "####################################################################"

start_recovery.sh

#!/bin/ksh

if [ "$1" = "" ]

then

echo ""

echo "##################################################################"


echo "# SCRIPT USAGE : start_recovery.sh #"

echo "##################################################################"

echo ""

exit

fi



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if [ $? != 0 ]

then

echo ""

echo "##################################################################"



echo "##################################################################"

echo ""

exit

fi







read -p JUNK


read -p DBROLE

print -p "exit"

if [ "$DBROLE" = "PRIMARY" ]

then

echo ""

echo "##################################################################"

echo "# ERROR ! ! ! NOT STANDBY DATABASE, PLEASE RUN IT ON STANDBY #"

echo "##################################################################"

echo ""

exit

fi

echo ""

echo "##################################################################"

echo "# STARTING RECOVERY FOR $DB STANDBY, PLEASE CONFIRM ... #"

echo "##################################################################"

echo ""


read ans

if [ "$ans" = 'Y' -o "$ans" = 'y' ]

then

sqlplus -s /nolog < /tmp/start_recovery.log


recover managed standby database disconnect;

alter system set log_archive_dest_state_2=defer scope=both;

EOF

cat /tmp/start_recovery.log


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ps -ef | grep ora_mrp0_$ORACLE_SID |grep -v grep > /dev/null

if [ $? != 0 ]

then

echo ""

echo "##################################################################"

echo "# RECOVERY PROCESS NOT RUNNING... PLEASE CHECK #"

echo "##################################################################"

echo ""

exit

else

echo "##################################################################"

echo "# MRP PROCESS SUCESSFULLY STARTED #"

echo "##################################################################"

echo ""

echo "####################################################################"

echo "# SWITCHOVER COMPLETE #"

echo ""

echo "* Perform Database Post-Switchover Checklist! "

echo "####################################################################"

fi

else


exit

fi

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July 6th, 2009 | Tags: data guard switchover, switchover | Category: High Availability, Scripts, Unix


10 of 10 6/7/2014 3:38 PM

Data Guard Switchover Unix Shell Script _ Oracle DBA – Tips and Techniques

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