commit b6624b2dbee6134be8e1db18b49cfd0228429021
Author: Mark Goddard <mark@stackhpc.com>
Date:   Thu Oct 8 15:39:03 2020 +0100

    Use upper constraints when installing Bifrost requirements
    
    Currently the install-deps.sh script installs Bifrost's Python
    requirements without upper constraints. This can result in requirements
    drifting over time, with issues arising in older branches.
    
    This change fixes the issue by using an upper constraints to install
    Bifrost's requirements.
    
    Change-Id: Icf66d0faf77837b9b48df344578823e46017b1df

diff --git a/scripts/install-deps.sh b/scripts/install-deps.sh
index d6f4a12..572c4a7 100755
--- a/scripts/install-deps.sh
+++ b/scripts/install-deps.sh
@@ -145,6 +145,6 @@ echo "Using Bindep to install binary dependencies"
 bindep -b &> /dev/null || ${INSTALLER_CMD} $(bindep -b)
 
 echo "Installing Python requirements"
-${PIP} install -r "$(dirname $0)/../requirements.txt"
+${PIP} install -r "$(dirname $0)/../requirements.txt" -c ${UPPER_CONSTRAINTS_FILE:-https://releases.openstack.org/constraints/upper/master}
 
 echo "Completed installation of basic dependencies."