Red Hat SATELLITE 5.0.0 RELEASE NOTES Przewodnik Instalacji Pobierz pdf (Strona 68)

5. Cloning the Satellite with Embedded DB

You may limit outages caused by hardware or other failures by cloning the Satellite with

Embedded Database in its entirety. The secondary Satellite machine can be prepared for use if

the primary fails. To clone the Satellite, perform these tasks:

1. Install RHN Satellite Server with Embedded Database (and a base install of Red Hat

Enterprise Linux AS) on a separate machine, skipping the SSL Certificate generation step.

2. Back up the primary Satellite's database daily using the commands described in Section 4.2,

“Backing up the Database”. If this is done, only changes made the day of the failure will be

lost.

3. Establish a mechanism to copy the backup to the secondary Satellite and keep these

repositories synchronized using a file transfer program such as rsync. If you're using a SAN,

copying isn't necessary.

4. Use RHN DB Control's restore option to import the duplicate data.

5. If the primary Satellite fails, transfer the SSL certificates from it to the secondary. Refer to the

Deploying the CA SSL Public Certificate to Clients section of the RHN Client Configuration

Guide for precise instructions.

6. Change DNS to point to the new machine or configure your load balancer appropriately.

6. Establishing Redundant Satellites with Stand-Alone

In keeping with the cloning option available to Satellite with Embedded Database, you may limit

outages on Satellites with Stand-Alone Database by preparing redundant Satellites. Unlike

cloning a Satellite with Embedded Database, redundant Satellites with Stand-Alone Database

may be run as active, as well as standby. This is entirely up to your network topology and is

independent of the steps listed here.

To establish this redundancy, first install the primary Satellite normally, except the value

specified in the Common Name field for the SSL certificate must represent your high-availability

configuration, rather than the hostname of the individual server. Then:

1. Prepare the Stand-Alone Database for failover using Oracle's recommendations for building

a fault-tolerant database. Consult your database administrator.

2. Install RHN Satellite Server with Stand-Alone Database (and a base install of Red Hat

Enterprise Linux AS) on a separate machine, skipping the database configuration, database

Chapter 8. Maintenance

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Red Hat SATELLITE 5.0.0 RELEASE NOTES Przewodnik Instalacji Strona 68