Pulp

The pulp-ci which installs pulp in a remote environment fails to install when docker is installed in the environment.

This was tested with pulp 2.17

Steps to reproduce¶

• Install docker in a f27 VM

   dnf install docker -y
  

• Run the pulp-ci that installs pulp in the remote

  ansible-playbook ci/ansible/pulp_server.yaml --inventory root@hostname, -e pulp_build=nightly -e pulp_version="'2.17'" 
  

• During installation, the install OS tree task failed thereby terminating the ci installer

Root Cause :
Docker installs a dependency: subscription-manager-rhsm-certificates-1.21.x which obsoletes python-rhsm-certificates that causes a dependency problem for os tree installation.

This issue happens only when docker is pre installed. It doesn't happen in the reverse situation ( install docker after pulp installation). This was found when trying the nodepool migration for docker-np images and running pulp installer on top of that.

The whole stack trace is attached with this issue.