Red Hat Training

A Red Hat training course is available for Red Hat Satellite

13.8.2. Migrating from an Embedded Database to an External PostgreSQL Database

The requirements to migrate from Embedded to an External PostgreSQL Database:

Procedure 13.3. 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)?
    Port [5432]?
    Database? myextdb
    Username? root
    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 postgresql92-server and spacewalk-dobby packages from the Satellite server.
    [root@satellite ~]# yum remove postgresql92-server spacewalk-dobby
  10. Start Red Hat Satellite.
    [root@satellite ~]# rhn-satellite start
The database is now migrated from an Embedded Database to an External PostgreSQL Database.