Red Hat NETWORK 3.6 -, Reference Manual

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Chapter 6. Red Hat Network Website 73
6.4.2.6.4.1. System Details Channels Software
Software channels provide a well-defined method to determine which packages should be available
to a system for installation or upgrade, based upon its operating systems, packages and, functionality.
Click a channel name to view its
Channel Details
page. To modify the child channels associated with
this system, use the checkboxes next to the channels and click the
Change Subscriptions
button. You
will receive a success message or be notified of any errors. To change the system’s base channel, select
the new one from the pulldown menu and click the Modify Base Channel button. Refer to Section
6.6.1 Software Channels for more information.
6.4.2.6.4.2. System Details Channels Configuration —
Assists in managing the configuration of the system. Like software channels, configuration channels
store files to be installed on systems. Unlike software packages, various versions of configuration files
may prove useful to a system at any given time.
To manage the configuration of a system, it must have the latest
rhncfg*
packages installed and
the
configfiles/
directory and associated files created on it. Refer to Section 6.6.6.1 Preparing
Systems for Config Management for instructions. Command line options also exist for many of these
functions. Refer to Appendix A Command Line Config Management Tools for instructions.
Here are the options available within the system’s
Configuration
tab, each of which results in a
separate subtab:
•
Managed Files — List all configuration files currently associated with the system. The Overrides
column identifies which config file from which channel will apply if the system is unsubscribed
from the config channel that provides the file now. For instance, if a system has ’/etc/foo’ from
channel ’bar’ and ’/etc/foo’ from channel ’baz’ is in the Overrides column, then unsubscribing
from channel ’bar’ will mean that the file from channel ’baz’ will be applicable. Also, if nothing
is in the ’Overrides’ column for a given file path, then unsubscribing from the channel providing
the file will mean that the file is no longer managed (though it will ( not remove the file from the
system).
•
Verify — Validate the configuration files installed on the system by comparing them to versions
stored in RHN’s central configuration manager. Select the files to be verified and click
Verify
.
•
Config Channels — Set the subscription and rank of configuration channels that may be associated
with the system, lowest first. Enter numbers in the
Rank
fields to establish the order in which
channels are used. Channels with no numeric value are not associated with the system. Your local
configuration channel will always override all other channels for this system and therefore cannot
have its rank adjusted from 1. All other channels are created in the Manage Config Channels
interface within the
Channels
category. Refer to Section 6.6.6 Manage Config Channels — for
instructions. When satisfied, click
Update
.
•
Local Overrides — View and manage the default configuration files for the system. If no files
exist, click the add, edit, or remove files link within the description to access the system’s Config
Channel Files
page. If a file exists, click its name to go to the
Configuration File Details
page.
Refer to Section 6.6.6.6 Configuration File Details — for instructions. To replicate the file
within a config channel, select its checkbox, click the Copy to Config Channel button, and select
the destination channel. To remove a file, select it and click
Delete Selected Files
.
•
Sandbox — Manipulate configuration files without deploying them. This sandbox provides you
with an area to experiment with files without affecting systems. To add files, click the
import new
files link, select an option for their addition from the dropdown menu, and click Go . Ensure you
have the latest
rhncfg*
packages. The rest of the functions work like those on the
Local Overrides
subtab.