Spacewalk contains a ULN plug-in for the spacewalk-repo-sync tool. The plug-in enables you to synchronize ULN channels directly into Spacewalk channels without requiring the Spacewalk server to be registered with ULN.

To configure the ULN plug-in, edit the /etc/rhn/spacewalk-repo-sync/uln.conf file and add login credentials for ULN. By default, this file is read-only by root.

[main] 
username = <ULN SSO username> 
password = <ULN SSO password>

After you edit the configuration file, ensure that the file permissions are read-only (0400) by root. This is an important security step to protect the ULN credentials.

Once the ULN plug-in is configured, you create the Spacewalk software channels and repositories in the normal way using the Spacewalk web interface. When you specify the URL for a ULN repository, use a URL in the following format:

uln:///<ULN channel label>

uln:///ol6_x86_64_latest

You can get a list of available ULN channel labels by logging in to ULN (https://linux.oracle.com) and selecting the Channels tab.