Comment 5 for bug 1640771

We've merged python-cryptography packages.
They are placed in "proposed" repository.

Currently we add only package repository with stable 9.0 which is frozen.

# cat /etc/yum.repos.d/mos.repo
[mos]
name=mos
type=rpm-md
baseurl=http://perestroika-repo-tst.infra.mirantis.net/mos-repos/centos/mos9.0-centos7/os/x86_64/
gpgcheck=0
enabled=1
priority=5

Please add proposed package repository with the fix to yum.repos.d :
http://perestroika-repo-tst.infra.mirantis.net/mos-repos/centos/mos9.0-centos7/proposed/x86_64/Packages/python2-cryptography-1.0-1.el7~mos3.x86_64.rpm