[Satellite 6.x] Upgrading a RHEL 7.9 content host to RHEL 8 via Red Hat Satellite fails with an 'Unable to use yum successfully' error

Solution Verified - Updated

Environment

  • Red Hat Satellite 6.x
  • Red Hat Enterprise Linux 7.x

Issue

While upgrading a RHEL 7.9 content host to RHEL 8 via satellite following the Red Hat recommendations here, when executing the command:

# leapp preupgrade

the following error is returned:

============================================================
                           ERRORS
============================================================

2021-01-29 15:08:52.432483 [ERROR] Actor: scan_subscription_manager_info
Message: Unable to use yum successfully
Summary:
    Details: Command ['yum', 'clean', 'all'] failed with exit code 1.
    Stderr: There are no enabled repos.
             Run "yum repolist all" to see the repos you have.
             To enable Red Hat Subscription Management repositories:
                 subscription-manager repos --enable <repo>
             To enable custom repositories:
                 yum-config-manager --enable <repo>

============================================================
                       END OF ERRORS
============================================================

Resolution

According to Chapter 2. Preparing a RHEL 7 system for the upgrade of the UPGRADING FROM RHEL 7 TO RHEL 8 guide, if the system to be upgraded is registered to Satellite Server, ensure that Satellite meets the following conditions:

Note: Follow RHEL 8 minor versions as per documentation. We expect those to be the latest released RHEL 8 version that has Extended Update Support available.

  1. Satellite has a subscription manifest with RHEL 8 repositories imported.

  2. The following repositories are enabled and synchronized with the latest updates, and published on Satellite:

    • Red Hat Enterprise Linux 7 Server RPMs x86_64 7 or Red Hat Enterprise Linux 7 Server RPMs x86_64 7.9
    • Red Hat Enterprise Linux 7 Server - Extras (RPMs)
    • Red Hat Enterprise Linux 8 for x86_64 - AppStream RPMs x86_64 8.4
    • Red Hat Enterprise Linux 8 for x86_64 - BaseOS RPMs x86_64 8.4

  3. The content host belongs to one of the following:

    • A Content View containing the above RHEL 7 and RHEL 8 repositories.
    • The Default Organization View Content View and the Library life cycle environment.

For more KB articles/solutions related to Red Hat Satellite 6.x LEAPP Issues, please refer to the Consolidated Troubleshooting Article for Red Hat Satellite 6.x LEAPP Issues

Diagnostic Steps

  • Use the following command to identify the Content View and life cycle environment associated with the affected content host:
# subscription-manager identity
  • Use the following command to check what yum repositories are enabled on the affected content host:
# yum -C repolist
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