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Oracle Database 21c

Download the following software:

NOTICE

This is a very basic install. It should only be used as a guide.

OS setup

Install Oracle Linux 8. "Minimal" installation.

As the root user, configure the OS and create the required directory structure.

dnf install -y oracle-database-preinstall-21c wget
mkdir -p /u01/app/oracle/product/21.0.0/dbhome_1
mkdir -p /u02/oradata
chown -R oracle:oinstall /u01 /u02
chmod -R 775 /u01 /u02

Database installation

As the oracle user:

Create a scripts folder:

mkdir /home/oracle/scripts

Create an environment script. This will hold all the necessary settings.

cat > /home/oracle/scripts/setEnv.sh <<EOF
# Oracle Settings
export TMP=/tmp
export TMPDIR=\$TMP
export ORACLE_HOSTNAME=ora21c.example.com
export ORACLE_UNQNAME=cdb1
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=\$ORACLE_BASE/product/21.0.0/dbhome_1
export ORA_INVENTORY=/u01/app/oraInventory
export ORACLE_SID=cdb1
export PDB_NAME=pdb1
export DATA_DIR=/u02/oradata
export PATH=/usr/sbin:/usr/local/bin:\$PATH
export PATH=\$ORACLE_HOME/bin:\$PATH
export LD_LIBRARY_PATH=\$ORACLE_HOME/lib:/lib:/usr/lib
export CLASSPATH=\$ORACLE_HOME/jlib:\$ORACLE_HOME/rdbms/jlib
EOF

Add the contents of setEnv.sh to Oracle's .bash_profile.

echo ". /home/oracle/scripts/setEnv.sh" >> /home/oracle/.bash_profile

Create a start script.

cat > /home/oracle/scripts/start_all.sh <<EOF
#!/bin/bash
. /home/oracle/scripts/setEnv.sh

export ORAENV_ASK=NO
. oraenv
export ORAENV_ASK=YES

dbstart \$ORACLE_HOME
EOF

Create a stop script.

cat > /home/oracle/scripts/stop_all.sh <<EOF
#!/bin/bash
. /home/oracle/scripts/setEnv.sh

export ORAENV_ASK=NO
. oraenv
export ORAENV_ASK=YES

dbshut \$ORACLE_HOME
EOF

Set the owner and permissions for the scripts.

chown -R oracle:oinstall /home/oracle/scripts
chmod u+x /home/oracle/scripts/*.sh

Load the environment.

source /home/oracle/.bash_profile

Unzip the database installer.

cd $ORACLE_HOME
unzip -oq /tmp/LINUX.X64_210000_db_home.zip

Run the installer.

./runInstaller -ignorePrereq -waitforcompletion -silent                        \
    -responseFile ${ORACLE_HOME}/install/response/db_install.rsp               \
    oracle.install.option=INSTALL_DB_SWONLY                                    \
    ORACLE_HOSTNAME=${ORACLE_HOSTNAME}                                         \
    UNIX_GROUP_NAME=oinstall                                                   \
    INVENTORY_LOCATION=${ORA_INVENTORY}                                        \
    SELECTED_LANGUAGES=en,en_US                                                \
    ORACLE_HOME=${ORACLE_HOME}                                                 \
    ORACLE_BASE=${ORACLE_BASE}                                                 \
    oracle.install.db.InstallEdition=EE                                        \
    oracle.install.db.OSDBA_GROUP=dba                                          \
    oracle.install.db.OSBACKUPDBA_GROUP=dba                                    \
    oracle.install.db.OSDGDBA_GROUP=dba                                        \
    oracle.install.db.OSKMDBA_GROUP=dba                                        \
    oracle.install.db.OSRACDBA_GROUP=dba                                       \
    SECURITY_UPDATES_VIA_MYORACLESUPPORT=false                                 \
    DECLINE_SECURITY_UPDATES=true

As a root user, execute the following:

/u01/app/oraInventory/orainstRoot.sh
/u01/app/oracle/product/21.0.0/dbhome_1/root.sh

As the oracle user:

Start the listener.

lsnrctl start

Create the database.

dbca -silent -createDatabase                                                   \
     -templateName General_Purpose.dbc                                         \
     -gdbname ${ORACLE_SID} -sid  ${ORACLE_SID} -responseFile NO_VALUE         \
     -characterSet AL32UTF8                                                    \
     -sysPassword Som3bTt3rpwd                                                 \
     -systemPassword Som3bTt3rpwd                                              \
     -createAsContainerDatabase true                                           \
     -numberOfPDBs 1                                                           \
     -pdbName ${PDB_NAME}                                                      \
     -pdbAdminPassword Som3bTt3rpwd                                            \
     -databaseType MULTIPURPOSE                                                \
     -automaticMemoryManagement false                                          \
     -totalMemory 2000                                                         \
     -storageType FS                                                           \
     -datafileDestination "${DATA_DIR}"                                        \
     -redoLogFileSize 50                                                       \
     -emConfiguration NONE                                                     \
     -ignorePreReqs

Edit the /etc/oratab file setting the restart flag for each instance to 'Y'.
Example:

cdb1:/u01/app/oracle/product/21.0.0/db_1:Y

Enable Oracle Managed Files and make the PDB start when the instance starts.

sqlplus / as sysdba <<EOF
alter system set db_create_file_dest='/u02/oradata';
alter pluggable database pdb1 save state;
exit;
EOF
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