July 2004 Page 5 Dell Enterprise Product Group
In many data centers, the number of Internet connections is minimized to maintain a high
level of security. The Satellite Server model allows for a completely disconnected
environment. However, administrators must determine how to transport the updates to an
isolated Satellite Server. The options are to connect the Satellite Server to the Internet, or to
load all the updates onto CD-ROMs and load the update content onto the local systems.
The Satellite Server model generally allows updates to occur faster than with Red Hat’s
hosted servers. Because the Satellite Server and the servers that are being updated through
the Satellite Server are on an internal network, the available bandwidth between them is
usually much greater than a connection over the Internet to Red Hat’s hosted servers. If
many systems must be updated and managed, then the increased speed of the Satellite
Server updates can be a deciding factor in determining which Red Hat Network model to
use.
Red Hat Network provides all of its software content in the form of channels. There is a
separate channel for each version of Red Hat Enterprise Linux. The channels that we chose
to provide on our Satellite server were the three Red Hat Enterprise Linux v.2.1 channels
for the AS, ES, and WS versions and also the three Red Hat Enterprise Linux v.3.0 channels
for the same three types.
Using a Red Hat Network Satellite Server also allows for the creation of custom channels
and the distribution of custom software packages. By creating a custom channel and
loading RPM™ (Red Hat Package Manager) software packages into that channel,
administrators can use the Satellite Server to distribute and later provide updates to those
packages.
The Red Hat Network offers three modules: Update, Management, and Provisioning. In the
Dell™ lab discussed in this article, only the Update and Management modules are used.
The Provisioning module adds the abilities to deploy, configure, manage, update, and
redeploy systems as well as the ability to take snapshots of systems for future rollback, if
needed. This article examines how the Dell lab uses the Red Hat Network Satellite Server
model to manage its Dell PowerEdge™ servers—including the installation and
configuration of the Satellite Server, updating of systems, and deployment of custom
updates and packages using the Update and Management modules.
(86 paginas)
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