Enforce upper-constraints when building ramdisksliberty-eol1.0.5stable/liberty

Currently, building ramdisks installs ironic-python-agent without any
upper-constraints. This causes the package to be installed with newer,
untested dependencies.

This commits introduces a tool to generate a local upper-constraints
file based on predefined strategies (below). Additionally, the fallback
to the openstack/requirements uses the URL defined in tox.ini instead of
redefining it. This prevents having to keep track of two separate
variables when releasing.

upper-constraints lookup strategies (in order):

  * UPPER_CONSTRAINTS_FILE points to a local file
  * UPPER_CONSTRAINTS_FILE points to a URL
  * /opt/stack/new/requirements/upper-constraints.txt
  * upper-constraints.txt from openstack/requirements git repository

Partial-bug: #1616554
Change-Id: Ib5c0c57cafdb6ffd7456e61f3b1bb5fa57520e5a
(cherry picked from commit a0ca6ce157b8a84f282d8abbdd27c75f48d991ff)

1 files changed, 2 insertions, 3 deletions

diff --git a/Dockerfile b/Dockerfile
index f6aa451b..337f2ea5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,11 +28,10 @@ RUN apt-mark manual python-minimal
 # Install requirements separately, because pip understands a git+https url
 # while setuptools doesn't
 RUN pip install --upgrade pip
-# TODO(jroll) use upper-constraints here
-RUN pip install -r /tmp/ironic-python-agent/requirements.txt
+RUN pip install -c /tmp/ironic-python-agent/upper-constraints.txt -r /tmp/ironic-python-agent/requirements.txt
 
 # This will succeed because all the dependencies were installed previously
-RUN pip install /tmp/ironic-python-agent
+RUN pip install -c /tmp/ironic-python-agent/upper-constraints.txt /tmp/ironic-python-agent
 
 # Remove no longer needed packages
 RUN apt-get -y purge gcc-4.6 gcc python2.7-dev git && \