12.8. Migrating the Database

Procedure 12.2. Migrating to a Managed Database

1. Shut down the Red Hat Satellite instance:

   [root@satellite ~]# rhn-satellite stop
   

2. Remove the rhn-upgrade package if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

3. Use db-control to create a database backup

   [root@satellite ~]# mkdir ~/dbbackup
   [root@satellite ~]# db-control backup ~/dbbackup
   

4. Copy the database backup from the Satellite server to the Managed Database server.

   [root@satellite ~]# scp -r ~/dbbackup root@manageddb.example.com:~/.
   

5. Install the Managed Database using the Red Hat Satellite installation ISO.
6. After you have installed the Managed External Database, shut it down and back up the database configuration and access control files.

   [root@manageddb ~]# db-control stop
   [root@manageddb ~]# cp /var/opt/rh/rh-postgresql95/lib/pgsql/data/postgresql.conf ~/dbbackup
   [root@manageddb ~]# cp /var/opt/rh/rh-postgresql95/lib/pgsql/data/pg_hba.conf ~/dbbackup
   

   You need to backup these files because the migration process will erase them.
7. Use db-control to restore the database backup to the Managed Database server.

   [root@manageddb ~]# db-control restore ~/dbbackup
   

8. Restore the database configuration and access control files from backup to the Managed Database.

   [root@manageddb ~]# cp ~/dbbackup/postgresql.conf /var/opt/rh/rh-postgresql95/lib/pgsql/data/postgresql.conf
   [root@manageddb ~]# cp ~/dbbackup/pg_hba.conf /var/opt/rh/rh-postgresql95/lib/pgsql/data/pg_hba.conf
   

9. On the Satellite server, edit the /etc/rhn/rhn.conf file and change db_host to the domain name of the Managed Database and set the db_port to 5432. For example:

   db_host = manageddb.example.com
   db_port = 5432
   

10. Remove rh-postgresql95-postgresql from the /etc/rhn/service-list file on the Satellite server.

    [root@satellite ~]# sed -i 's/rh-postgresql95-postgresql //g' /etc/rhn/service-list
    

11. On the Managed Database, edit the /etc/rhn/rhn.conf file and change db_name, db_user, db_password to reflect the same values in /etc/rhn/rhn.conf on the Satellite server. For example:

    db_name = mydb
    db_user = mydbuser
    db_password = mydbpassword
    

12. Start the Managed Database instance using db-control.

    [root@manageddb ~]# db-control start
    

13. Remove the PostgreSQL and spacewalk-dobby packages from the Satellite server.

    [root@satellite ~]# yum remove rh-postgresql95 rh-postgresql95-postgresql rh-postgresql95-postgresql-contrib rh-postgresql95-postgresql-libs rh-postgresql95-postgresql-server rh-postgresql95-postgresql-pltcl spacewalk-dobby
    

14. Restart Red Hat Satellite.

    [root@satellite ~]# rhn-satellite start
    

Procedure 12.3. Migrating to an External PostgreSQL Database

1. Shut down all services on the Red Hat Satellite server, but start the Embedded Database with db-control:

   [root@satellite ~]# rhn-satellite stop
   [root@satellite ~]# db-control start
   

2. Remove the rhn-upgrade if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

3. Update your database to the latest schema version:

   [root@satellite ~]# yum update satellite-schema
   [root@satellite ~]# spacewalk-schema-upgrade
   

   This ensures that your database version matches the latest version on the External PostgreSQL Database.
4. Create a directory to hold your database snapshot.

   [root@satellite ~]# mkdir ~/dbbackup
   [root@satellite ~]# cd ~/dbbackup
   

5. Export the database using spacewalk-dump-schema:

   [root@satellite dbbackup]# spacewalk-dump-schema --to=postgresql > migrate-to-postgresql.sql
   

6. Stop the Embedded Database:

   [root@satellite dbbackup]# db-control stop
   

7. Use spacewalk-setup to populate the External PostgreSQL Database:

   [root@satellite dbbackup]# spacewalk-setup --db-only --external-postgresql
   

   The script asks for your database details so Satellite can connect and populate the database. Enter your External PostgreSQL Database details:

   ** Database: Setting up database connection for PostgreSQL backend.
   Hostname (leave empty for local)? postgresql.example.com
   Port [5432]?
   Database? myextdb
   Username? root
   Password?
   

   The script populates the database.
8. When the script completes database population, restore the database schema

   [root@satellite dbbackup]# spacewalk-sql -i < migrate-to-postgresql.sql
   

9. Remove the PostgreSQL and spacewalk-dobby packages from the Satellite server.

   [root@satellite ~]# yum remove rh-postgresql95 rh-postgresql95-postgresql rh-postgresql95-postgresql-contrib rh-postgresql95-postgresql-libs rh-postgresql95-postgresql-server rh-postgresql95-postgresql-pltcl spacewalk-dobby
   

10. Start Red Hat Satellite.

    [root@satellite ~]# rhn-satellite start
    

Procedure 12.4. Migrating to an External Oracle Database

1. Shut down all services on the Red Hat Satellite server, but start the Embedded Database with db-control:

   [root@satellite ~]# rhn-satellite stop
   [root@satellite ~]# db-control start
   

2. Remove the rhn-upgrade package if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

3. Update your database to the latest schema version:

   [root@satellite ~]# yum update satellite-schema
   [root@satellite ~]# spacewalk-schema-upgrade
   

   This ensures that your database version matches the latest version on the External Oracle Database.
4. Create a directory to hold your database snapshot.

   [root@satellite ~]# mkdir ~/dbbackup
   [root@satellite ~]# cd ~/dbbackup
   

5. Export the database using spacewalk-dump-schema:

   [root@satellite dbbackup]# spacewalk-dump-schema --to=oracle > migrate-to-oracle.sql
   

6. Stop the Embedded Database:

   [root@satellite dbbackup]# db-control stop
   

7. Exchange the PostgreSQL drivers and configuration scripts with the Oracle drivers and configuration scripts on the Satellite server:

   [root@satellite dbbackup]# yum remove -y spacewalk-postgresql
   [root@satellite dbbackup]# yum install -y spacewalk-oracle
   [root@satellite dbbackup]# yum remove -y spacewalk-java-postgresql spacewalk-backend-sql-postgresql
   

8. Use spacewalk-setup to populate the External Oracle Database:

   [root@satellite dbbackup]# spacewalk-setup --db-only --external-oracle
   

   The script asks for your database details so Satellite can connect and populate the database. Enter your External Oracle Database details:

   ** Database: Setting up database connection for Oracle backend.
   Database service name (SID)? oracledb
   Database hostname [localhost]? oracledb.example.com
   Database (listener) port [1521]?
   

   The script populates the database.

   Important

   Use the default Oracle Database port (1521) for the Red Hat Satellite database. Using an alternative port can cause SELinux errors.
9. When the script completes database population, restore the database schema

   [root@satellite dbbackup]# spacewalk-sql -i < migrate-to-oracle.sql
   

   Important

   You might need to change SELinux context of the migration script before loading it into Oracle Database:

   [root@satellite dbbackup]# semanage fcontext -a -t oracle_sqlplus_exec_t /root/dbbackup/migrate-to-oracle.sql
   [root@satellite dbbackup]# restorecon -v /root/dbbackup/migrate-to-oracle.sql
   

   Similarly, you might need to change SELinux context of dumped tables:

   [root@satellite dbbackup]# semanage fcontext -a -t oracle_tmp_t "/tmp/dumped-tables(/.*)?"
   [root@satellite dbbackup]# restorecon -R -v /tmp/dumped-tables/
   

10. Remove the PostgreSQL and spacewalk-dobby packages from the Satellite server.

    [root@satellite ~]# yum remove rh-postgresql95 rh-postgresql95-postgresql rh-postgresql95-postgresql-contrib rh-postgresql95-postgresql-libs rh-postgresql95-postgresql-server rh-postgresql95-postgresql-pltcl spacewalk-dobby
    

11. Start Red Hat Satellite.

    [root@satellite ~]# rhn-satellite start
    

Procedure 12.5. Migrating to an Embedded Database

1. Stop the main services on the Satellite server.

   [root@satellite ~]# rhn-satellite stop
   

2. Shut down the database on the Managed Database server.

   [root@manageddb ~]# db-control stop
   

3. Remove the rhn-upgrade package if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

4. Use db-control to create a database backup on the Managed Database Server and copy that backup to the Satellite server.

   [root@manageddb ~]# mkdir ~/dbbackup
   [root@manageddb ~]# db-control backup ~/dbbackup
   [root@manageddb ~]# scp -r ~/dbbackup root@satellite.example.com:~/.
   

   The Managed Database server is now free for other purposes. All further actions take place on the Satellite server.
5. Mount the Red Hat Satellite installation ISO on the Satellite server and set and export the YUM0 variable with the Red Hat Satellite mount point value.

   [root@satellite ~]# mkdir /media/cdrom
   [root@satellite ~]# mount -o loop Red_Hat_Satellite_58.iso /media/cdrom
   [root@satellite ~]# export YUM0=/media/cdrom
   

6. Enable the red-hat-satellite repository. If the red-hat-satellite repository definition is not present, install the satellite-repo package found in $YUM0/Satellite. After the red-hat-satellite repository is enabled, install the @satellite-database package group and disable the red-hat-satellite repository.

   [root@satellite ~]# yum install @satellite-database --enablerepo=red-hat-satellite
   

7. Use db-control to restore the database backup.

   [root@satellite ~]# db-control restore ~/dbbackup
   

8. Edit the /etc/rhn/rhn.conf file to remove the db_port and db_hostname values.

   [root@satellite ~]# sed -i 's/db_host\s*=.*/db_host = /' /etc/rhn/rhn.conf
   [root@satellite ~]# sed -i 's/db_port\s*=.*/db_port = /' /etc/rhn/rhn.conf
   

9. Add the rh-postgresql95-postgresql service to the /etc/rhn/service-list file to ensure that it is started and stopped in parallel with Red Hat Satellite.

   [root@satellite ~]# echo "SERVICES=\"rh-postgresql95-postgresql \$SERVICES\"" >> /etc/rhn/service-list
   

10. Start the Red Hat Satellite services.

    [root@satellite ~]# rhn-satellite start
    

Procedure 12.6. Migrating to an Embedded Database from an External PostgreSQL Database

1. Shut down all services on the Red Hat Satellite server:

   [root@satellite ~]# rhn-satellite stop
   

2. Make sure your External PostgreSQL Database is still running.
3. Remove the rhn-upgrade if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

4. Update the External PostgreSQL Database to the latest schema version:

   [root@satellite ~]# yum update satellite-schema
   [root@satellite ~]# spacewalk-schema-upgrade
   

   This ensures that your database version matches the latest version for the Embedded Database.
5. Create a directory to hold your database snapshot.

   [root@satellite ~]# mkdir ~/dbbackup
   [root@satellite ~]# cd ~/dbbackup
   

6. Export the database using spacewalk-dump-schema:

   [root@satellite dbbackup]# spacewalk-dump-schema --to=postgresql > migrate-to-postgresql.sql
   

7. Stop the External Database. It is no longer required.
8. Install the PostgreSQL installation and Satellite database tools packages on the Satellite server:

   [root@satellite dbbackup]# yum install -y spacewalk-setup-postgresql spacewalk-dobby
   

9. Use spacewalk-setup to populate the Embedded Database:

   [root@satellite dbbackup]# spacewalk-setup --db-only
   

   The script populates the database. Wait until this process completes.

   ** Database: Setting up database connection for PostgreSQL backend.
   ** Database: Installing the database:
   ** Database: This is a long process that is logged in:
   ** Database:   /var/log/rhn/install_db.log
   *** Progress: #
   ** Database: Installation complete.
   ** Database: Populating database.
   *** Progress: ####################################
   

10. When the script completes database population, restore the database schema:

    [root@satellite dbbackup]# spacewalk-sql -i < migrate-to-postgresql.sql
    

11. Start Red Hat Satellite.

    [root@satellite ~]# rhn-satellite start
    

Procedure 12.7. Migrating to an Embedded Database from Oracle Database

1. Shut down all services on the Red Hat Satellite server:

   [root@satellite ~]# rhn-satellite stop
   

2. Make sure your External Oracle Database is still running.
3. Remove the rhn-upgrade if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

4. Update the External Oracle Database to the latest schema version:

   [root@satellite ~]# yum update satellite-schema
   [root@satellite ~]# spacewalk-schema-upgrade
   

   This ensures that your database version matches the latest version for the Embedded Database.
5. Create a directory to hold your database snapshot.

   [root@satellite ~]# mkdir ~/dbbackup
   [root@satellite ~]# cd ~/dbbackup
   

6. Export the database using spacewalk-dump-schema:

   [root@satellite dbbackup]# spacewalk-dump-schema --to=postgresql > migrate-to-postgresql.sql
   

7. Stop the External Oracle Database. It is no longer required.
8. Exchange the Oracle drivers and configuration scripts with the PostgreSQL drivers and configuration scripts on the Satellite server:

   [root@satellite dbbackup]# yum remove -y spacewalk-oracle
   [root@satellite dbbackup]# yum install -y spacewalk-postgresql spacewalk-setup-postgresql spacewalk-dobby
   [root@satellite dbbackup]# yum remove -y spacewalk-java-oracle spacewalk-backend-sql-oracle
   

9. Use spacewalk-setup to populate the Embedded Database:

   [root@satellite dbbackup]# spacewalk-setup --db-only
   

   The script populates the database. Wait until this process completes.

   ** Database: Setting up database connection for PostgreSQL backend.
   ** Database: Installing the database:
   ** Database: This is a long process that is logged in:
   ** Database:   /var/log/rhn/install_db.log
   *** Progress: #
   ** Database: Installation complete.
   ** Database: Populating database.
   *** Progress: ####################################
   

10. When the script completes database population, restore the database schema

    [root@satellite dbbackup]# spacewalk-sql -i < migrate-to-postgresql.sql
    

11. Start Red Hat Satellite.

    [root@satellite ~]# rhn-satellite start
    

Procedure 12.8. Migrating to an External Database from Oracle Database

1. Shut down all services on the Red Hat Satellite server:

   [root@satellite ~]# rhn-satellite stop
   

2. Make sure your External Oracle Database is still running.
3. Remove the rhn-upgrade if it exists on your server:

   [root@satellite ~]# yum remove rhn-upgrade
   

4. Update the External Oracle Database to the latest schema version:

   [root@satellite ~]# yum update satellite-schema
   [root@satellite ~]# spacewalk-schema-upgrade
   

   This ensures that your database version matches the latest version for the External Database.
5. Create a directory to hold your database snapshot.

   [root@satellite ~]# mkdir ~/dbbackup
   [root@satellite ~]# cd ~/dbbackup
   

6. Export the database using spacewalk-dump-schema:

   [root@satellite dbbackup]# spacewalk-dump-schema --to=postgresql > migrate-to-postgresql.sql
   

7. Stop the External Oracle Database. It is no longer required.
8. Exchange the Oracle drivers and configuration scripts with the PostgreSQL drivers and configuration scripts on the Satellite server:

   [root@satellite dbbackup]# yum remove -y spacewalk-oracle
   [root@satellite dbbackup]# yum install -y spacewalk-postgresql
   [root@satellite dbbackup]# yum remove -y spacewalk-java-oracle spacewalk-backend-sql-oracle
   

9. Use spacewalk-setup to populate the External Database:

   [root@satellite dbbackup]# spacewalk-setup --db-only --external-postgresql
   

   The script asks for your database details so Satellite can connect and populate the database. Enter your External PostgreSQL Database details:

   ** Database: Setting up database connection for PostgreSQL backend.
   Hostname (leave empty for local)? postgresql.example.com
   Port [5432]?
   Database? myextdb
   Username? root
   Password?
   

10. When the script completes database population, restore the database schema

    [root@satellite dbbackup]# spacewalk-sql -i < migrate-to-postgresql.sql
    

11. Start Red Hat Satellite.

    [root@satellite ~]# rhn-satellite start