Oracle12c: How to create CDB in manually

Posted 2023-02-18 yexianyi

1. Set ORACLE_SID, for example, NDLNE

   export ORACLE_SID=NDLNE

2. Create PFILE

   vi /u01/app/oracle/admin/NDLNE/pfile/init.ora
   
   db_name='NDLNE'
   memory_target=1G
   memory_max_target=1G
   DB_CREATE_FILE_DEST='/u01/app/oracle/oradata'
   control_files='/u01/app/oracle/oradata/NDLNE/controlfile/control01.ctl','/u01/app/oracle/oradata/NDLNE/controlfile/control02.ctl'
   enable_pluggable_database=true
   

   Notice：

   1. db_name shoule be same with ORACLE_SID；

   2. If using OMF（Oracle Managed Files）, DB_CREATE_FILE_DEST will be a mandatory parameter;

   3. 'enable_pluggable_database=true ' is mandatory.

   4. Other parameters are optional.

3. Create CDB

   sqlplus / as sysdba ;
   
   startup pfile='/u01/app/oracle/admin/NDLNE/pfile/init.ora' nomount ;
   
   CREATE DATABASE NDLNE
   USER SYS IDENTIFIED BY Passw0rd!
   USER SYSTEM IDENTIFIED BY Passw0rd!
   EXTENT MANAGEMENT LOCAL
   DEFAULT TABLESPACE users
   DEFAULT TEMPORARY TABLESPACE temp
   UNDO TABLESPACE undotbs1
   enable pluggable database
   seed
   FILE_NAME_CONVERT = ('/u01/app/oracle/oradata/NDLNE/',
                            '/u01/app/oracle/oradata/NDLNE/pdbseed/')
   SYSTEM DATAFILES SIZE 125M AUTOEXTEND ON NEXT 10M MAXSIZE UNLIMITED
   SYSAUX DATAFILES SIZE 100M;

   Notice:

   1. ALl the folders involved into above script must be created in advance, otherwise the process will be failed.

   2. 'enable pluggable database' must be state explictly

4. Reset PATH

   export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:$ORACLE_HOME/perl/bin: $ORACLE_HOME/jdk/bin:$PATH

5. Rename util.pm

   vi /u01/app/oracle/product/12.2.0/dbhome_1/rdbms/admin/catcdb.pl

   Replace line#35: use utilqw(trim, splitToArray); with use Utilqw(trim, splitToArray);

6. Create Data Dictionary Views (Do this step if Oracle <12.2)

   sqlplus / as sysdba
   
   @$ORACLE_HOME/rdbms/admin/catalog.sql
   @$ORACLE_HOME/rdbms/admin/catproc.sql

7. Install CDB components (Do this step if Oracle >= 12.2)

   sqlplus / as sysdba
   
   @?/rdbms/admin/catcdb.sql
   
   SQL> host perl -I &&rdbms_admin &&rdbms_admin_catcdb --logDirectory &&1 --logFilename &&2
   
   Enter value for 1: /u01/app/oracle/product/12.2.0/dbhome_1/rdbms/admin
   
   Enter value for 2: /u01/app/oracle/product/12.2.0/dbhome_1/rdbms/admin/catcdb.pl
   
   ​

8. Verify all scripts execution are valid

   sqlplus / as sysdba
   
   select object_name, object_type from dba_objects where status = 'INVALID' ;

9. Done

After Install:

1. After install CDB successfully, you still need to config tnsnames.ora in order to have capablity to connect with Oracle CDB: NDLNE 

   # tnsnames.ora Network Configuration File: /u01/app/oracle/product/12.2.0/dbhome_1/network/admin/tnsnames.ora
   # Generated by Oracle configuration tools.
   
   NDLNE =
     (DESCRIPTION =
       (ADDRESS_LIST =
         (ADDRESS = (PROTOCOL = TCP)(HOST = centos8.linuxvmimages.local)(PORT = 1521))
       )
       (CONNECT_DATA =
         (SERVICE_NAME = NDLNE)
       )
     )
   

    If your configuration on tnsnames.ora is correct, and your oracle listener are running, you should be able to exec tnsping successfully.

   [oracle@centos8 sqldeveloper]$ tnsping NDLNE
   
   Used TNSNAMES adapter to resolve the alias
   Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = centos8.linuxvmimages.local)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = NDLNE)))
   OK (0 msec)
   

    

2. But for log on NDLNE CDB with sqlplus, you need to mount database firstly.

   sqlplus / as sysdba ;
   
   startup pfile='/u01/app/oracle/admin/NDLNE/pfile/init.ora' nomount ;
   
   create spfile from pfile='/u01/app/oracle/admin/NDLNE/pfile/init.ora' ;
   
   alter database mount ;
   
   conn sys/Passw0rd!@NDLNE as sysdba ;