• Arun Kumar

Oracle 12c Installation on Linux with ASM

In this article we will be looking at Oracle 12c release 2 installation on Oracle Linux 7.6 with ASM. If you already know, Oracle ASM binaries comes with Grid Software!


Prerequisites


Connect to OEL 7.6 server via putty and install the below packages

yum -y install oracle-database-server-12cR2-preinstall
yum -y install oracleasm*
yum -y install kmod-oracleasm*

Add below OS groups

groupadd -g 54327 asmdba
groupadd -g 54328 asmoper
groupadd -g 54329 asmadmin

Add asmdba as secondary group to Oracle user

usermod -a -G asmdba oracle

Create Grid User

useradd -u 54331 -g oinstall -G dba,asmdba,asmoper,asmadmin,racdba grid

Change the password for Oracle and Grid user

passwd oracle
passwd grid

Create the Directories for Oracle Database installation

mkdir -p /u01/app/oracle
mkdir -p /u01/app/oracle/product/12.2.0/db_home
chown -R oracle:oinstall /u01

Create the Directories for Oracle Grid installation

mkdir -p /u01/app/grid
mkdir -p /u01/app/grid/product/12.2.0/grid_home
chown -R grid:oinstall /u01/app/grid
chown -R 775 /u01


Configure Oracle ASM


Let us configure Oracle ASM

oracleasm configure -i

Default user to own the driver interface []: grid
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n): y
Writing Oracle ASM library driver configuration: done

Load / initiate Oracle ASM

oracleasm init

Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module “oracleasm”: oracleasm
Configuring “Oracleasm” to use device physical block size
Mounting ASMlib driver filesystem: /dev/oracleasm

Add 30 GB HDD to virtual machine which we will use to create 3 partitions of 10 GB each for our ASM disks. Open Virtual machine >> Settings >> Storage >> Controller: SATA >> Create new disk


Click Next >> Next >> Give size 30 GB >> Click on Create


Start virtual machine and login as root user to format the newly added disk

fdisk -1

In the above output the /dev/sdb is not yet formatted. Let's create 3 partitions on sdb

fdisk /dev/sdb

n                        --> to create new partition
<enter>
<enter>
<enter>
+10G

n
<enter>
<enter>
<enter>
+10G

n
<enter>
<enter>
<enter>
<enter>

w                        --> to save partition table

Create separate ASM Disk for each partition

oracleasm createdisk CRS1 /dev/sdb1
oracleasm createdisk DATA1 /dev/sdb2
oracleasm createdisk FRA1 /dev/sdb3

To check asm disks

oracleasm listdisks

ls -lrt /dev/oracleasm/disks


Install Grid Software


Edit Grid user Bash_Profile but take .bash_profile backup before editing it

su - grid
cp .bash_profile .bash_profile.orig
vi .bash_profile

Paste below contents

if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
ORACLE_SID=+ASM; export ORACLE_SID
ORACLE_BASE=/u01/app/grid; export ORACLE_BASE
ORACLE_HOME=/u01/app/grid/12.2.0/grid_home; export ORACLE_HOME
ORACLE_TERM=xterm; export ORACLE_TERM
JAVA_HOME=/usr/bin/java; export JAVA_HOME
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN

PATH=.:${JAVA_HOME}/bin:${PATH}:$HOME/bin:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/local/bin
export PATH

umask 022

Save and close vi editor. Execute the bash profile and check the environment variables

. .bash_profile
env|grep ORA

Copy the 12cR2 grid software under grid home and unzip it

cd $ORACLE_HOME
unzip linuxx64_12201_grid_home.zip

Start the gridSetup.sh which will install grid software

./gridSetup.sh

Follow below screens to perform the grid software installation

  • Change Disk group name as CRS

  • Select External

  • Click on Change Discovery Path

  • Give Disk Discovery Path as /dev/oracleasm/disks

  • Click on OK

Select /dev/oracleasm/disks/CRS1 >> Next

Select Use Same Password for these Accounts >> Specify password >> confirm password >> Next. Click on Yes

Click Next >> Next

Click Next >> Next >> Next

Click on fix and check again

Copy script and paste into the Root User

Click on OK >> Check Ignore All >> Click Yes

Click on Install and wait for installer to prompt root scripts

Click on Close



Configure ASM Diskgroups


The grid installer allows you to only create one diskgroup (CRS). We need to start the asmca utility in order to create DATA and FRA diskgroup which are required for database installation. Click on Create



  • Give Disk Group Name as DATA

  • Select External(None)

  • Select /dev/oracleasm/disks/DATA1

  • Click on OK

Click on Create

  • Give Disk Group Name as FRA

  • Select External(None)

  • Select /dev/oracleasm/disks/FRA1

  • Click on OK

Exit >> Yes



Install Oracle Software


Edit Oracle user bash profile and put below

vi .bash_profile

if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
ORACLE_HOSTNAME=asm.dbagenesis.com; export ORACLE_HOSTNAME
ORACLE_SID=prod; export ORACLE_SID
ORACLE_UNQNAME=prod; export ORACLE_UNQNAME
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=/u01/app/oracle/product/12.2.0/db_home; export ORACLE_HOME
ORACLE_TERM=xterm; export ORACLE_TERM

JAVA_HOME=/usr/bin/java; export JAVA_HOME
NLS_DATE_FORMAT="DD-MON-YYYY HH24:MI:SS"; export NLS_DATE_FORMAT
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN
PATH=.:${JAVA_HOME}/bin:${PATH}:$HOME/bin:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/local/bin
export PATH

LD_LIBRARY_PATH=$ORACLE_HOME/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:$ORACLE_HOME/oracm/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/lib:/usr/lib:/usr/local/lib
export LD_LIBRARY_PATH

CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib:$ORACLE_HOME/network/jlib
export CLASSPATH

TEMP=/tmp ;export TMP
TMPDIR=$tmp ; export TMPDIR

umask 022

Execute the Bash_Profile

. .bash_profile

Unzip the Oracle software

cd /u01
unzip linuxx64_12201_database.zip 

Start the runinstaller

cd database
./runinstaller

Uncheck the i wish to receive security updates via my oracle support

Select install database software only >> Next >> Next >> Next >> Next >> Next

Click on Install

Run the Root scripts as root user

Close the installer.



DBCA Create Database on ASM


We can now go ahead and create database on ASM with DBCA. Start DBCA >> Create a Database >> Advance Configuration

  • Give Global Database name as prod

  • Uncheck Create as container database

  • Click on Next

Select Use following for the database storage attributes >> Browse

  • Select DATA >> Click on OK

  • Click on Next

Select specific fast recovery area >> Browse

  • Select FRA >>  Click on OK

  • Change Fast Recovery Area Size  >> Next

Click Next >> Next >> Next

Uncheck Register with Enterprise Manager(EM) database express


Select Use the same administrative password for all accounts >> Password >> Confirm Password


Select Create the database >> Next >> Finish

Done! For confirmation purpose, connect to database as Oracle user and issue below queries

SQL> select name, open_mode from v$database;
SQL> select name from  v$datafile;
SQL> select name from  v$controlfile;

We have successfully create Oracle Database on ASM!


The process remains pretty much the same when compared to 12cR1 and also with the 11gR2 release.

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