Comment 0 for bug 1696083

Kolla master CI for ubuntu binary images has been broken for a few weeks.

Finally managed to find the root cause.

python-neutron-vpnaas and python-rally packages depend in python-sqlalchemy.

Both packages hardpin to python-sqlalchemy (<< 1.1).

python-sqlalchemy package provided by ubuntu pike repository [0] is 1.1.9+ds1-0ubuntu1~cloud0

Sample gates logs [1]

[0] http://ubuntu-cloud.archive.canonical.com/ubuntu/dists/xenial-updates/pike/main/binary-amd64/Packages

[1 http://logs.openstack.org/77/469077/1/check/gate-kolla-dsvm-build-ubuntu-binary-ubuntu-xenial-nv/a6bcd77/logs/build/neutron-server.txt.gz