Description of problem:

Up until yesterday, installing packages with RUN in Dockerfile which uses FROM registry.fedoraproject.org/fedora:25 worked. Now things fail as can also be demonstrated with plaing docker run:

$ docker run --rm -ti registry.fedoraproject.org/fedora:25 dnf install -y python
Fedora 25 - x86_64 - Updates                                                                                                          78 MB/s |  23 MB     00:00    
Fedora 25 - x86_64 - Test Updates                                                                                                     38 MB/s | 2.3 MB     00:00    
Fedora 25 - x86_64                                                                                                                    83 MB/s |  50 MB     00:00    
Last metadata expiration check: 0:00:12 ago on Fri Jun  9 06:01:14 2017.
Dependencies resolved.
=====================================================================================================================================================================
 Package                                       Arch                              Version                                    Repository                          Size
=====================================================================================================================================================================
Installing:
 python                                        x86_64                            2.7.13-2.fc25                              updates                             96 k
 python-libs                                   x86_64                            2.7.13-2.fc25                              updates                            6.2 M
 python-pip                                    noarch                            8.1.2-2.fc25                               fedora                             1.7 M
 python2-setuptools                            noarch                            25.1.1-1.fc25                              fedora                             506 k

Transaction Summary
=====================================================================================================================================================================
Install  4 Packages

Total download size: 8.5 M
Installed size: 34 M
Downloading Packages:
(1/4): python-2.7.13-2.fc25.x86_64.rpm                                                                                               793 kB/s |  96 kB     00:00    
(2/4): python2-setuptools-25.1.1-1.fc25.noarch.rpm                                                                                    20 MB/s | 506 kB     00:00    
(3/4): python-pip-8.1.2-2.fc25.noarch.rpm                                                                                             10 MB/s | 1.7 MB     00:00    
(4/4): python-libs-2.7.13-2.fc25.x86_64.rpm                                                                                           28 MB/s | 6.2 MB     00:00    
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                4.5 MB/s | 8.5 MB     00:01     
warning: /var/cache/dnf/updates-87ad44ec2dc11249/packages/python-2.7.13-2.fc25.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fdb19c98: NOKEY
Curl error (37): Couldn't read a file:// file for file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64 [Couldn't open file /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64]
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
$ 

The reason seems to be the missing /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64.

Version-Release number of selected component (if applicable):

registry.fedoraproject.org/fedora:25 f3535ce68198

How reproducible:

Deterministic.

Steps to Reproduce:
1. docker run --rm -ti registry.fedoraproject.org/fedora:25 ls -la /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64

Actual results:

$ docker run --rm -ti registry.fedoraproject.org/fedora:25 ls -la /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64
ls: cannot access '/etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64': No such file or directory

Expected results:

lrwxrwxrwx. 1 root root 29 Mar  6 18:52 /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64 -> RPM-GPG-KEY-fedora-25-primary

This is the result I get with

$ docker run --rm -ti fedora:25 ls -la /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-25-x86_64

Additional info:

The registry.fedoraproject.org/fedora:25 is fresh from today's update yet it says

$ docker images | grep registry.fedoraproject.org/fedora
registry.fedoraproject.org/fedora   25                  f3535ce68198        10 months ago       193.8 MB

To the contrary the docker.io/fedora:25 is fresh one

docker.io/fedora                    25                  15895ef0b3b2        6 weeks ago         230.9 MB

and works.

I first saw it reported in bug 1415167.