Setting up Oracle RAC

The following sections describe how to replace the default H2 database with Oracle RAC:

Oracle Real Application Clusters (RAC) is an option for the Oracle Database for clustering and high availability in Oracle database environments. In the Oracle RAC environment, some of the commands used in oracle.sql are considered inefficient. Therefore, the product has a separate SQL script oracle_rac.sql for Oracle RAC. The Oracle RAC-friendly script is located in the dbscripts folder together with other .sql scripts.

Setting up the database and users

Follow the steps below to set up an Oracle RAC database.

1. Set environment variables <ORACLE_HOME>, PATH, and ORACLE_SID with the corresponding values /oracle/app/oracle/product/11.2.0/dbhome_1, $PATH:<ORACLE_HOME>/bin, and orcl1 as follows:
   
2. Connect to Oracle using SQL*Plus as SYSDBA.
   

3. Create a database user and grant privileges to the user as shown below:

   Create user <USER_NAME> identified by password account unlock;
   grant connect to <USER_NAME>;
   grant create session, create table, create sequence, create trigger to <USER_NAME>;
   alter user <USER_NAME> quota <SPACE_QUOTA_SIZE_IN_MEGABYTES> on '<TABLE_SPACE_NAME>';
   commit;

4. Exit from the SQL*Plus session by executing the quit command.

Setting up the JDBC driver

Copy the Oracle JDBC libraries (for example, the <ORACLE_HOME>/jdbc/lib/ojdbc14.jar file) to the <PRODUCT_HOME>/repository/components/lib/ directory. Remove the old database driver from the <PRODUCT_HOME>/repository/components/dropins/ directory when you upgrade the database driver.

Setting up datasource configurations

A datasource is used to establish the connection to a database. By default, WSO2_CARBON_DB datasource is used to connect to the default H2 database, which stores registry and user management data. After setting up the Oracle RAC database to replace the default H2 database, either change the default configurations of the WSO2_CARBON_DB datasource, or configure a new datasource to point it to the new database as explained below.

Changing the default WSO2_CARBON_DB datasource

Follow the steps below to change the type of the default WSO2_CARBON_DB datasource.

Edit the default datasource configuration in the <PRODUCT_HOME>/repository/conf/datasources/m aster-datasources.xml file as shown below.

<datasource>
     <name>WSO2_CARBON_DB</name>
     <description>The datasource used for registry and user manager</description>
     <jndiConfig>
          <name>jdbc/WSO2CarbonDB</name>
     </jndiConfig>
     <definition type="RDBMS">
          <configuration>
            <url>jdbc:oracle:thin:@(DESCRIPTION=(LOAD_BALANCE=on)
   			       (ADDRESS=(PROTOCOL=TCP)(HOST=racnode1) (PORT=1521))
   			       (ADDRESS=(PROTOCOL=TCP)(HOST=racnode2) (PORT=1521))
   			       (CONNECT_DATA=(SERVICE_NAME=rac)))</url>
            <username>regadmin</username>
            <password>regadmin</password>
            <driverClassName>oracle.jdbc.driver.OracleDriver</driverClassName>
            <maxActive>80</maxActive>
            <maxWait>60000</maxWait>
            <minIdle>5</minIdle>
            <testOnBorrow>true</testOnBorrow>
            <validationQuery>SELECT 1 FROM DUAL</validationQuery>
            <validationInterval>30000</validationInterval>
          </configuration>
     </definition>
</datasource>

The elements in the above configuration are described below:

Configuring new datasources to manage registry or user management data 

Follow the steps below to configure new datasources to point to the new  databases you create to manage registry and/or user management data separately. 

1. Add a new datasource with similar configurations as the  WSO2_CARBON_DB datasource above to the <PRODUCT_HOME>/repository/conf/datasources/ master-datasources.xml file. Change its elements with your custom values. For instructions, see Setting up datasource configurations.

2. If you are setting up a separate database to store registry-related data, update the following configurations in the <PRODUCT_HOME>/repository/conf/ registry.xml file.

   <dbConfig name="wso2registry">
   	<dataSource>jdbc/MY_DATASOURCE_NAME</dataSource>
   </dbConfig>

3. If you are setting up a separate database to store user management data, update the following configurations in the <PRODUCT_HOME>/repository/conf/ user-mgt.xml file.

   <Configuration>
   	<Property name="dataSource">jdbc/MY_DATASOURCE_NAME</Property>
   </Configuration>

Creating the database tables

To create the database tables, connect to the database that you created earlier and run the following scripts in SQL*Plus:

1. To create tables in the registry and user manager database (WSO2CARBON_DB), use the below script:

   SQL> @$<PRODUCT_HOME>/dbscripts/oracle.sql

2. Restart the server.

   You can create database tables automatically when starting the product for the first time by using the -Dsetup parameter as follows:

   • For Windows: <PRODUCT_HOME>/bin/wso2server.bat -Dsetup

   • For Linux: <PRODUCT_HOME>/bin/wso2server.sh -Dsetup

     


Changing the product-specific/identity databases

The topics above show how to change the WSO2_CARBON_DB, which is used to store registry and user manager information. If you changed the product-specific database (WSO2AM_DB) that comes by default or set up a separate database for identity related data, the instructions are the same. In summary:

1. Add the datasource to the master-datasources.xml file. The datasource for the product-specific database is already there in the file by the name WSO2AM_DB . Change its elements with your custom values.

2. Create the database tables using the following scripts:  

   For the product-specific database	Use the scripts in the <PRODUCT_HOME>/dbscripts/apimgt folder
   For the identity database	Use the scripts in the <PRODUCT_HOME>/dbscripts/identity folder