Cloning an Oracle Home

You may wish to clone an Oracle Home, for example you have all your databases on a single Oracle Home but you want to separate Development from Test.  This could be so you can soak test Patch Set Updates (PSU) on Development before applying to Test and then Production.  Or you might wish to have 2 Oracle Homes, so you can patch one and then switch all databases to the patched Oracle Home for minimal downtime.

 

Copying the Oracle Home

First you need to copy the Oracle Home at file level using cp as user root as shown below:

[root@v1ex2dbadm01 ~]# cp -Rp /u01/app/oracle/product/12.1.0.2/dbhome_1 /u01/app/oracle/product/12.1.0.2/dbhome_2

Then check the Oracle Home and the Cloned Oracle Home are the same size:

[root@v1ex2dbadm01 ~]# du -h /u01/app/oracle/product/12.1.0.2/dbhome_1 --max-depth=0
12G /u01/app/oracle/product/12.1.0.2/dbhome_1
[root@v1ex2dbadm01 ~]# du -h /u01/app/oracle/product/12.1.0.2/dbhome_2 --max-depth=0
12G /u01/app/oracle/product/12.1.0.2/dbhome_2

Then repeat on all the other nodes:

[root@v1ex2dbadm02 ~]# cp -Rp /u01/app/oracle/product/12.1.0.2/dbhome_1 /u01/app/oracle/product/12.1.0.2/dbhome_2
[root@v1ex2dbadm02 ~]# du -h /u01/app/oracle/product/12.1.0.2/dbhome_1 --max-depth=0
12G /u01/app/oracle/product/12.1.0.2/dbhome_1
[root@v1ex2dbadm02 ~]# du -h /u01/app/oracle/product/12.1.0.2/dbhome_2 --max-depth=0
12G /u01/app/oracle/product/12.1.0.2/dbhome_2

 

Cloning the Oracle Home

Now we have a copy of the Oracle Home, we next need to clone using the clone.pl perl script as shown below:

/usr/bin/perl $ORACLE_HOME/clone/bin/clone.pl \
'-O"CLUSTER_NODES={v1ex2dbadm01,v1ex2dbadm02}"' \
'-O"LOCAL_NODE=v1ex2dbadm01"' ORACLE_BASE=/u01/app/oracle \
ORACLE_HOME=$ORACLE_HOME ORACLE_HOME_NAME=OraDB12Home2 '-O-noConfig'

CLUSTER_NODES = all the nodes in the cluster
LOCAL_NODE = The node you are running the command on
ORACLE_BASE = The Oracle Base defined on the Server
ORACLE_HOME = The Cloned Oracle Home, already exported
ORACLE_HOME_NAME = The name you wish to give to the Cloned Oracle Home

[root@v1ex2dbadm01 ~]# su - oracle
[oracle@v1ex2dbadm01 ~]$ export ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_2
[oracle@v1ex2dbadm01 ~]$ /usr/bin/perl $ORACLE_HOME/clone/bin/clone.pl \
> '-O"CLUSTER_NODES={v1ex2dbadm01,v1ex2dbadm02}"' \
> '-O"LOCAL_NODE=v1ex2dbadm01"' ORACLE_BASE=/u01/app/oracle \
> ORACLE_HOME=$ORACLE_HOME ORACLE_HOME_NAME=OraDB12Home2 '-O-noConfig'
./runInstaller -clone -waitForCompletion "CLUSTER_NODES={v1ex2dbadm01,v1ex2dbadm02}" "LOCAL_NODE=v1ex2dbadm01" "ORACLE_BASE=/u01/app/oracle" "ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_2" "ORACLE_HOME_NAME=OraDB12Home2" -noConfig -silent -paramFile /u01/app/oracle/product/12.1.0.2/dbhome_2/clone/clone_oraparam.ini
Starting Oracle Universal Installer...

Checking Temp space: must be greater than 500 MB. Actual 5392 MB Passed
Checking swap space: must be greater than 500 MB. Actual 24532 MB Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2017-06-21_02-57-14PM. Please wait ...You can find the log of this install session at:
/u01/app/oraInventory/logs/cloneActions2017-06-21_02-57-14PM.log
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Copy files in progress.

Copy files successful.

Link binaries in progress.

Link binaries successful.

Setup files in progress.

Setup files successful.

Setup Inventory in progress.

Setup Inventory successful.

Finish Setup successful.
The cloning of OraDB12Home2 was successful.
Please check '/u01/app/oraInventory/logs/cloneActions2017-06-21_02-57-14PM.log' for more details.

Setup Oracle Base in progress.

Setup Oracle Base successful.
 .................................................. 95% Done.

As a root user, execute the following script(s):
1. /u01/app/oracle/product/12.1.0.2/dbhome_2/root.sh

Execute /u01/app/oracle/product/12.1.0.2/dbhome_2/root.sh on the following nodes:
[v1ex2dbadm01]

.................................................. 100% Done.

[oracle@v1ex2dbadm01 ~]$

Next check the re-linking is RDS not UDP:

[oracle@v1ex2dbadm01 ~]$ /u01/app/oracle/product/12.1.0.2/dbhome_2/bin/skgxpinfo
rds
[oracle@v1ex2dbadm01 ~]$

If UDP, then relink using command below:

cd $ORACLE_HOME/rdbms/lib; ORACLE_HOME=$ORACLE_HOME make -f ins_rdbms.mk ipc_rds ioracle

Then repeat on all the other nodes, remember to change LOCAL_NODE:

[root@v1ex2dbadm02 ~]# su - oracle
[oracle@v1ex2dbadm02 ~]$ export ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_2
[oracle@v1ex2dbadm02 ~]$ /usr/bin/perl $ORACLE_HOME/clone/bin/clone.pl \
> '-O"CLUSTER_NODES={v1ex2dbadm01,v1ex2dbadm02}"' \
> '-O"LOCAL_NODE=v1ex2dbadm02"' ORACLE_BASE=/u01/app/oracle \
> ORACLE_HOME=$ORACLE_HOME ORACLE_HOME_NAME=OraDB12Home2 '-O-noConfig'
./runInstaller -clone -waitForCompletion "CLUSTER_NODES={v1ex2dbadm01,v1ex2dbadm02}" "LOCAL_NODE=v1ex2dbadm02" "ORACLE_BASE=/u01/app/oracle" "ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_2" "ORACLE_HOME_NAME=OraDB12Home2" -noConfig -silent -paramFile /u01/app/oracle/product/12.1.0.2/dbhome_2/clone/clone_oraparam.ini
Starting Oracle Universal Installer...

Checking Temp space: must be greater than 500 MB. Actual 10725 MB Passed
Checking swap space: must be greater than 500 MB. Actual 24565 MB Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2017-06-21_03-05-37PM. Please wait ...You can find the log of this install session at:
/u01/app/oraInventory/logs/cloneActions2017-06-21_03-05-37PM.log
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Copy files in progress.

Copy files successful.

Link binaries in progress.

Link binaries successful.

Setup files in progress.

Setup files successful.

Setup Inventory in progress.

Setup Inventory successful.

Finish Setup successful.
The cloning of OraDB12Home2 was successful.
Please check '/u01/app/oraInventory/logs/cloneActions2017-06-21_03-05-37PM.log' for more details.

Setup Oracle Base in progress.

Setup Oracle Base successful.
 .................................................. 95% Done.

As a root user, execute the following script(s):
1. /u01/app/oracle/product/12.1.0.2/dbhome_2/root.sh

Execute /u01/app/oracle/product/12.1.0.2/dbhome_2/root.sh on the following nodes:
[v1ex2dbadm02]

.................................................. 100% Done.

[oracle@v1ex2dbadm02 ~]$ /u01/app/oracle/product/12.1.0.2/dbhome_2/bin/skgxpinfo
rds
[oracle@v1ex2dbadm02 ~]$

Next need to run root.sh as shown below:

[oracle@v1ex2dbadm01 ~]$ exit
logout
[root@v1ex2dbadm01 ~]# /u01/app/oracle/product/12.1.0.2/dbhome_2/root.sh
Check /u01/app/oracle/product/12.1.0.2/dbhome_2/install/root_v1ex2dbadm01.v1.com_2017-06-21_15-04-16.log for the output of root script
[root@v1ex2dbadm01 ~]#

Then repeat on all the other nodes:

[oracle@v1ex2dbadm02 ~]$ exit
logout
[root@v1ex2dbadm02 ~]# /u01/app/oracle/product/12.1.0.2/dbhome_2/root.sh
Check /u01/app/oracle/product/12.1.0.2/dbhome_2/install/root_v1ex2dbadm02.v1.com_2017-06-21_15-06-49.log for the output of root script
[root@v1ex2dbadm02 ~]#

Verify that the Cloned Oracle Home comprises of all the nodes in the cluster:

[root@v1ex2dbadm01 ~]# su - oracle
[oracle@v1ex2dbadm01 ~]$ export ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_2
[oracle@v1ex2dbadm01 ~]$ $ORACLE_HOME/OPatch/opatch lsinventory -oh $ORACLE_HOME | grep node
Rac system comprising of multiple nodes
Local node = v1ex2dbadm01
Remote node = v1ex2dbadm02
[oracle@v1ex2dbadm01 ~]$

Then repeat on all the other nodes:

[root@v1ex2dbadm02 ~]# su - oracle
[oracle@v1ex2dbadm02 ~]$ export ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/dbhome_2
[oracle@v1ex2dbadm02 ~]$ $ORACLE_HOME/OPatch/opatch lsinventory -oh $ORACLE_HOME | grep node
Rac system comprising of multiple nodes
Local node = v1ex2dbadm02
Remote node = v1ex2dbadm01
[oracle@v1ex2dbadm02 ~]$

 

Switching Databases to Cloned Oracle Home

Change the Oracle Home using server control:

[oracle@v1ex2dbadm01 ~]$ srvctl config database -d V1DEV -a
Database unique name: V1DEV
Database name:
Oracle home: /u01/app/oracle/product/12.1.0.2/dbhome_1
Oracle user: oracle
Spfile: +DATAC1/V1DEV/PARAMETERFILE/spfileV1DEV.ora
Password file:
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools:
Disk Groups: DATAC1,RECOC1
Mount point paths:
Services: v1jobservice
Type: RAC
Start concurrency:
Stop concurrency:
Database is enabled
Database is individually enabled on nodes:
Database is individually disabled on nodes:
OSDBA group: dba
OSOPER group: dba
Database instances: V1DEV1,V1DEV2
Configured nodes: v1ex2dbadm01,v1ex2dbadm02
Database is administrator managed
[oracle@v1ex2dbadm01 ~]$ srvctl modify database -d V1DEV -o /u01/app/oracle/product/12.1.0.2/dbhome_2
[oracle@v1ex2dbadm01 ~]$ srvctl config database -d V1DEV -a
Database unique name: V1DEV
Database name:
Oracle home: /u01/app/oracle/product/12.1.0.2/dbhome_2
Oracle user: oracle
Spfile: +DATAC1/V1DEV/PARAMETERFILE/spfileV1DEV.ora
Password file:
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools:
Disk Groups: DATAC1,RECOC1
Mount point paths:
Services: v1jobservice
Type: RAC
Start concurrency:
Stop concurrency:
Database is enabled
Database is individually enabled on nodes:
Database is individually disabled on nodes:
OSDBA group: dba
OSOPER group: dba
Database instances: V1DEV1,V1DEV2
Configured nodes: v1ex2dbadm01,v1ex2dbadm02
Database is administrator managed
[oracle@v1ex2dbadm01 ~]$

Next change /etc/oratab to reflect the new Oracle Home:

[oracle@v1ex2dbadm01 ~]$ vi /etc/oratab
[oracle@v1ex2dbadm01 ~]$ more /etc/oratab | grep dbhome_2
V1DEV1:/u01/app/oracle/product/12.1.0.2/dbhome_2:N # line added by Agent

Then repeat on all the other nodes:

[oracle@v1ex2dbadm02 ~]$ vi /etc/oratab
[oracle@v1ex2dbadm02 ~]$ more /etc/oratab | grep dbhome_2
V1DEV2:/u01/app/oracle/product/12.1.0.2/dbhome_2:N # line added by Agent

Now we rolling bounce the database:

[oracle@v1ex2dbadm01 ~]$ srvctl status database -d V1DEV -v
Instance V1DEV1 is running on node v1ex2dbadm01. Instance status: Open,Running from Old Oracle Home.
Instance V1DEV2 is running on node v1ex2dbadm02 with online services v1jobservice. Instance status: Open,Running from Old Oracle Home.
[oracle@v1ex2dbadm01 ~]$ srvctl stop instance -d V1DEV -i V1DEV1 -f
[oracle@v1ex2dbadm01 ~]$ srvctl start instance -d V1DEV -i V1DEV1
[oracle@v1ex2dbadm01 ~]$ srvctl stop instance -d V1DEV -i V1DEV2 -f
[oracle@v1ex2dbadm01 ~]$ srvctl start instance -d V1DEV -i V1DEV2
[oracle@v1ex2dbadm01 ~]$ srvctl status database -d V1DEV -v
Instance V1DEV1 is running on node v1ex2dbadm01. Instance status: Open.
Instance V1DEV2 is running on node v1ex2dbadm02 with online services v1jobservice. Instance status: Open.
[oracle@v1ex2dbadm01 ~]$

 

Related My Oracle Support (MOS) notes:

Master Note For Cloning Oracle Database Server ORACLE_HOME’s Using the Oracle Universal Installer (OUI) (Doc ID 1154613.1)

Cloning An Existing Oracle Database 12c Release 1 (12.1.0.x) RDBMS Installation Using OUI (Doc ID 1493677.1)

Minimal downtime patching via cloning 11gR2 ORACLE_HOME directories (Doc ID 1136544.1)

 

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Thanks

Zed DBA (Zahid Anwar)

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