the RHN Satellite Server is designed to be a standalone environment, any update advisories
published by RHN must be manually imported and synchronized by the administrator of the
RHN Satellite Server.
During synchronization over the Internet, the RHN Satellite Synchronization Tool performs
the following steps:
1. Connects over SSL to central RHN Servers, authenticates itself as an RHN Satellite Server,
and triggers an export of RHN data — unless a local mount point for RHN-exported data is
specified, in which case no connection is necessary. Refer to
Section 3.2, “Synchronizing
Errata and Packages via Local Media”
for an explanation.
2. Examines the export and identifies differences between the RHN Satellite Server data set
and the exported RHN data set. For a particular channel, the following information is
analyzed:
• Channel metadata
• Metadata of all packages in that channel
• Metadata for all Errata that affect that channel
Note
All analysis is performed on the RHN Satellite Server; the central RHN Servers
deliver only an export of its channel information and remain ignorant of any
details regarding the RHN Satellite Server.
3. After the analysis of the export data, any differences are imported into the RHN Satellite
Server database. Please note that importing new packages may take variable lengths of
time. For a large update, an import can take many hours.
The
satellite-sync
command can be used in two modes: via RHN and via local media.
3.1. Synchronizing Errata and Packages Directly via RHN
For customers who want to sync data as frequently as possible and who can initiate
connections outside of their own environments, the satellite sync can be run over the Internet
through SSL. This is the default setting for the satellite sync script. For example:
satellite-sync -c rhel-i386-as-3
This connects to central Red Hat Network Servers and performs the process described above.
Chapter 6. Importing and Sync...
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