DNF is now included in the 4.16 rhel-coreos images, but without the subscription-manager package (and its dependencies) it is not useful. DNF itself relies on subscription-manager and its DNF plugin to set up access to entitled RH content.

4.16.0-rc.4

100%

1. Run rhel-coreos container image

# podman run --rm -ti $(./oc adm release info 4.16.0-rc.4 --image-for=rhel-coreos)


2. Attempt to install a RHEL package with dnf inside the container

# dnf install rsyslog

bash-5.1# dnf install rsyslog
Error: There are no enabled repositories in "/etc/yum.repos.d", "/etc/yum/repos.d", "/etc/distro.repos.d".

bash-5.1# dnf install rsyslog
Updating Subscription Management repositories.
Unable to read consumer identity
subscription-manager is operating in container mode.
Red Hat Enterprise Linux 9 for x86_64 - BaseOS (RPMs)                                                                             24 MB/s |  23 MB     00:00    
Red Hat Enterprise Linux 9 for x86_64 - AppStream (RPMs)                                                                          33 MB/s |  36 MB     00:01    
Last metadata expiration check: 0:00:05 ago on Mon Jun 10 18:35:20 2024.
Dependencies resolved.
=================================================================================================================================================================
 Package                               Architecture               Version                             Repository                                            Size
=================================================================================================================================================================
Installing:
 rsyslog                               x86_64                     8.2310.0-4.el9                      rhel-9-for-x86_64-appstream-rpms                     809 k
Installing dependencies:
 libestr                               x86_64                     0.1.11-4.el9                        rhel-9-for-x86_64-appstream-rpms                      29 k
 libfastjson                           x86_64                     0.99.9-5.el9                        rhel-9-for-x86_64-appstream-rpms                      41 k
Installing weak dependencies:
 rsyslog-logrotate                     x86_64                     8.2310.0-4.el9                      rhel-9-for-x86_64-appstream-rpms                      12 kTransaction Summary
=================================================================================================================================================================
Install  4 PackagesTotal download size: 891 k
Installed size: 2.7 M
[...]

# podman run --rm -ti $(../oc adm release info 4.16.0-rc.4 --image-for=rhel-coreos)

bash-5.1# dnf install rsyslog -y
Error: There are no enabled repositories in "/etc/yum.repos.d", "/etc/yum/repos.d", "/etc/distro.repos.d".

bash-5.1# rpm-ostree install subscription-manager
Enabled rpm-md repositories: rhel-9-for-x86_64-baseos-rpms rhel-9-for-x86_64-appstream-rpms
Updating metadata for 'rhel-9-for-x86_64-baseos-rpms'... done
Updating metadata for 'rhel-9-for-x86_64-appstream-rpms'... done
Importing rpm-md... done
rpm-md repo 'rhel-9-for-x86_64-baseos-rpms'; generated: 2024-06-10T07:52:53Z solvables: 7598
rpm-md repo 'rhel-9-for-x86_64-appstream-rpms'; generated: 2024-06-10T13:41:17Z solvables: 21530
Resolving dependencies... done
Will download: 22 packages (3.8?MB)
Downloading from 'rhel-9-for-x86_64-baseos-rpms'... done
Installing 22 packages:
  gobject-introspection-1.68.0-11.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  libdnf-plugin-subscription-manager-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  python3-chardet-4.0.0-5.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-cloud-what-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  python3-dateutil-1:2.8.1-7.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-decorator-4.4.2-6.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-dnf-plugins-core-4.3.0-13.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-gobject-base-3.40.1-6.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  python3-gobject-base-noarch-3.40.1-6.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-idna-2.10-7.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-iniparse-0.4-45.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-inotify-0.9.6-25.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-librepo-1.14.5-2.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  python3-pysocks-1.7.1-12.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-requests-2.25.1-8.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-six-1.15.0-9.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  python3-subscription-manager-rhsm-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  python3-systemd-234-18.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  python3-urllib3-1.26.5-5.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
  subscription-manager-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  usermode-1.114-4.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
  virt-what-1.25-5.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms) Installing: python3-six-1.15.0-9.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-dateutil-1:2.8.1-7.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-iniparse-0.4-45.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-idna-2.10-7.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-librepo-1.14.5-2.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: libdnf-plugin-subscription-manager-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: virt-what-1.25-5.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: gobject-introspection-1.68.0-11.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-gobject-base-noarch-3.40.1-6.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-gobject-base-3.40.1-6.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-systemd-234-18.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-dnf-plugins-core-4.3.0-13.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: usermode-1.114-4.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-pysocks-1.7.1-12.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-urllib3-1.26.5-5.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-inotify-0.9.6-25.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-decorator-4.4.2-6.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-chardet-4.0.0-5.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-requests-2.25.1-8.el9.noarch (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-cloud-what-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: python3-subscription-manager-rhsm-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Installing: subscription-manager-1.29.40-1.el9.x86_64 (rhel-9-for-x86_64-baseos-rpms)
Created symlink /etc/systemd/system/multi-user.target.wants/rhsmcertd.service → /usr/lib/systemd/system/rhsmcertd.service.

bash-5.1# rm -v /etc/yum.repos.d/redhat.repo 
removed '/etc/yum.repos.d/redhat.repo'

bash-5.1# dnf repolist
Updating Subscription Management repositories.
Unable to read consumer identity
subscription-manager is operating in container mode.
repo id                                                              repo name
rhel-9-for-x86_64-appstream-rpms                                     Red Hat Enterprise Linux 9 for x86_64 - AppStream (RPMs)
rhel-9-for-x86_64-baseos-rpms                                        Red Hat Enterprise Linux 9 for x86_64 - BaseOS (RPMs)

bash-5.1# head /etc/yum.repos.d/redhat.repo 
#
# Certificate-Based Repositories
# Managed by (rhsm) subscription-manager
#
# *** This file is auto-generated.  Changes made here will be over-written. ***
# *** Use "subscription-manager repo-override --help" if you wish to make changes. ***
#
# If this file is empty and this system is subscribed consider
# a "yum repolist" to refresh available repos
#


bash-5.1# dnf install rsyslog -y
Updating Subscription Management repositories.
Unable to read consumer identity
subscription-manager is operating in container mode.
Red Hat Enterprise Linux 9 for x86_64 - AppStream (RPMs)                                                                          39 MB/s |  36 MB     00:00    
Red Hat Enterprise Linux 9 for x86_64 - BaseOS (RPMs)                                                                             29 MB/s |  23 MB     00:00    
Last metadata expiration check: 0:00:05 ago on Mon Jun 10 18:42:03 2024.
Dependencies resolved.
=================================================================================================================================================================
 Package                               Architecture               Version                             Repository                                            Size
=================================================================================================================================================================
Installing:
 rsyslog                               x86_64                     8.2310.0-4.el9                      rhel-9-for-x86_64-appstream-rpms                     809 k
Installing dependencies:
 libestr                               x86_64                     0.1.11-4.el9                        rhel-9-for-x86_64-appstream-rpms                      29 k
 libfastjson                           x86_64                     0.99.9-5.el9                        rhel-9-for-x86_64-appstream-rpms                      41 k
Installing weak dependencies:
 rsyslog-logrotate                     x86_64                     8.2310.0-4.el9                      rhel-9-for-x86_64-appstream-rpms                      12 kTransaction Summary
=================================================================================================================================================================
Install  4 Packages
[...]
Installed:
  libestr-0.1.11-4.el9.x86_64        libfastjson-0.99.9-5.el9.x86_64        rsyslog-8.2310.0-4.el9.x86_64        rsyslog-logrotate-8.2310.0-4.el9.x86_64       Complete!