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 called “set$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 ""

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

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 ""

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

echo "#        SCRIPT USAGE : make_me_standby.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 ""

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;

 

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"

 

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

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" = "" ]

then

echo ""

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

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

echo "#         SCRIPT USAGE : make_me_primary.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 ""

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;

 

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  "exit"

 

if [ "$DBROLE" = "PRIMARY"  ]

then

echo ""

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

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

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

echo ""

exit

fi

 

echo ""

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

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

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_primary.log

connect / as sysdba;

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

echo "Quitting ....."

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

echo "#      SCRIPT USAGE : start_recovery.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 ""

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;

 

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  "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 ""

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

read ans

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

then

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

connect / as sysdba;

recover managed standby database disconnect;

alter system set log_archive_dest_state_2=defer scope=both;

EOF

cat /tmp/start_recovery.log

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

echo "Quitting ....."

exit

fi