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Description of problem:
When registering systems in an AWS environment that is configured to use their RHUI, subscription-manager will fail to upload full profiles - specifically, the module profile, due to the way the RHUI configured repositories are handled.

The RHUI repos have a variable (not defined as a variable) set statically in their baseurl: 'REGION'. This "variable" is modified live by the dnf plugin 'amazon-id'. If I understand correctly, we own this plugin (RHUI Team).

Version-Release number of selected component (if applicable):
subscription-manager-1.27.1-1.el8_3

How reproducible:
100%

Steps to Reproduce:
1. Register in AWS while configured to RHUI
2. Review /var/log/rhsm/rhsm.log during/after registration for "ERROR".
3.

Actual results:
2021-02-02 16:00:58,002 [ERROR] rhsmcertd-worker:33038:MainThread @profile.py:90 - Unable to create sack object: Failed to download metadata for repo 'rhui-client-config-server-8': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for https://rhui3.REGION.aws.ce.redhat.com/pulp/mirror/protected/rhui-client-config/rhel/server/8/x86_64/os [Could not resolve host: rhui3.REGION.aws.ce.redhat.com]

Expected results:
Upload module profile.

Additional info:

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (subscription-manager bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:4390