Use python3 venv module instead of virtualenv

We install virtualenv module using apt package
python3-virtualenv. The Ubuntu Jammy version of
this package is not compatible with the Openstack 2025.1
(requirements/upper-constrains.txt:platformdirs===4.3.6).

Venv module is part of the standard Python3 distribution
since 3.3 and we don't need it to be compatible with Python2.
Let's use it instead of virtualenv.

Change-Id: Ic70af615ef42d69a4055998130487a5ed10d2232

Dockerfile

@@ -46,7 +46,6 @@ ARG SPICE_REF=spice-html5-0.1.6
 
 # Virtualenv arguments
 
-ARG GET_PIP_URL="https://bootstrap.pypa.io/get-pip.py"
 ARG PIP_CONSTRAINT=""
 ARG SETUPTOOL_CONSTRAINT=""
 ARG WHEEL_CONSTRAIN=""

scripts/install.sh

@@ -10,7 +10,7 @@ if [[ ${distro} == "ubuntu" ]]; then
 fi
 export distro_version=${DISTRO_VERSION:=$distro_version}
 
-dpkg_python_packages=("python3" "python3-virtualenv")
+dpkg_python_packages=("python3" "python3-venv")
 rpm_python_packages=("python3")
 
 case ${distro} in

scripts/setup_pip.sh

@@ -5,19 +5,14 @@ set -ex
 PIP_CONSTRAINT=${PIP_CONSTRAINT}
 SETUPTOOL_CONSTRAINT=${SETUPTOOL_CONSTRAINT}
 WHEEL_CONSTRAIN=${WHEEL_CONSTRAIN}
-VIRTUALENV="python3 -m virtualenv --python=python3 --no-seed"
-
-wget $GET_PIP_URL -O /tmp/get-pip.py
 
 # Create the virtualenv with the updated toolchain for openstack service
 # for using python-rbd which is not pip installable and is only available
 # in packaged form.
-$VIRTUALENV  --system-site-packages --extra-search-dir=/tmp/wheels /var/lib/openstack
+python3 -m venv --system-site-packages /var/lib/openstack
 
 source /var/lib/openstack/bin/activate
 
-python /tmp/get-pip.py
-
 pip install --upgrade pip${PIP_CONSTRAINT}
 pip install --upgrade setuptools${SETUPTOOL_CONSTRAINT}
 pip install --upgrade wheel${WHEEL_CONSTRAIN}