[SOLVED] yum/repositories is not using sub-folders from source

Issue

I'm pretty much new to centOS. I was using Ubuntu for the last years. But I want to build an production openstack environment and switched os for this purpose. Now i have problems to came along with the yum-installer behaviour.

On my centOS system, there is a source-repository-file /etc /yum.repos.d/CentOS-OpenStack-mitaka.repo.

[centos-openstack-mitaka]
name=CentOS-7 - OpenStack mitaka
baseurl=http://mirror.centos.org/centos/7/cloud/$basearch/openstack-mitaka/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Cloud
 (...)

I tried to install a package out of the repository, which seems to work just fine, but the package need a specific version of a dependency.

Error: Package: 1:python-keystone-9.0.2-1.el7.noarch (centos-openstack-mitaka)
       Requires: python-sqlalchemy >= 1.0.10
       Available: python-sqlalchemy-0.9.8-1.el7.x86_64 (base)
           python-sqlalchemy = 0.9.8-1.el7
Error: Package: python2-oslo-db-4.6.0-1.el7.noarch (centos-openstack-mitaka)
       Requires: python-sqlalchemy >= 0.9.9
       Installing: python-sqlalchemy-0.9.8-1.el7.x86_64 (base)
           python-sqlalchemy = 0.9.8-1.el7
Error: Package: 1:python-keystone-9.0.2-1.el7.noarch (centos-openstack-mitaka)
       Requires: python-sqlalchemy >= 1.0.10
       Installing: python-sqlalchemy-0.9.8-1.el7.x86_64 (base)
           python-sqlalchemy = 0.9.8-1.el7

I was looking for this version, and found it. It is in a subfolder of the specific repository, but it is not used. I don't know why the yum-system does not use the subfolder of the repo. (http://mirror.centos.org/centos/7/cloud/x86_64/openstack-mitaka/common/python-sqlalchemy-1.0.11-1.el7.x86_64.rpm)

Perhaps someone with more experiance with the centOS yum installer can help me with this problem.

Solution

Found the answer to this strange (for me it's very strange) behaviour. There is a plugin calles 'priority'. This prevent using a package even if the version is newer because of priorities. I could install my package with a disable parameter.

--disableplugin=

Or even remove (CentOS 7) the plugin with

yum remove yum-plugin-priorities

Answered By - dominic

Answer Checked By - Marilyn (WPSolving Volunteer)