CI: Avoid tox (and clean up gate setup)

We don't need tox nor tell our users to use it when doing kolla
builds.
Tox is going away from base infra images.
It's already gone from aarch64 (arm64) ones.

Change-Id: I2eb5203ad93c011b8806f4b6fb56db081c14a2cb

tests/run.yml

@@ -60,13 +60,6 @@
       when:
         - ansible_architecture == 'aarch64'
 
-    - name: Ensure tox is installed
-      pip:
-        name: tox
-        extra_args: "-c {{ upper_constraints_file }}"
-      when: need_build_image
-      become: true
-
     # NOTE(yoctozepto): required to template template_overrides.j2 for Zuul
     - name: Include kolla Zuul vars if building new images
       include_vars:

tools/setup_gate.sh

@@ -2,11 +2,11 @@
 
 set -o xtrace
 set -o errexit
+set -o pipefail
 
 # Enable unbuffered output for Ansible in Jenkins.
 export PYTHONUNBUFFERED=1
 
-GIT_PROJECT_DIR=$(mktemp -d)
 
 function setup_openstack_clients {
     # Prepare virtualenv for openstack deployment tests
@@ -28,7 +28,11 @@ function setup_openstack_clients {
     ~/openstackclient-venv/bin/pip install -c $UPPER_CONSTRAINTS ${packages[@]}
 }
 
-function setup_config {
+function prepare_images {
+    if [[ "${BUILD_IMAGE}" == "False" ]]; then
+        return
+    fi
+
     if [[ $SCENARIO != "bifrost" ]]; then
         GATE_IMAGES="^cron,^fluentd,^glance,^haproxy,^keepalived,^keystone,^kolla-toolbox,^mariadb,^memcached,^neutron,^nova-,^openvswitch,^rabbitmq,^horizon,^chrony,^heat,^placement"
     else
@@ -70,7 +74,8 @@ function setup_config {
     if [[ "debian" == $BASE_DISTRO ]]; then
         PUSH="false"
     fi
-    cat <<EOF | sudo tee /etc/kolla/kolla-build.conf
+
+    sudo tee /etc/kolla/kolla-build.conf <<EOF
 [DEFAULT]
 namespace = lokolla
 base = ${BASE_DISTRO}
@@ -90,15 +95,16 @@ gate = ${GATE_IMAGES}
 EOF
 
     mkdir -p /tmp/logs/build
-}
 
-function prepare_images {
-    if [[ "${BUILD_IMAGE}" == "False" ]]; then
-        return
-    fi
     sudo docker run -d -p 4000:5000 --restart=always -v /opt/kolla_registry/:/var/lib/registry --name registry registry:2
-    pushd "${KOLLA_SRC_DIR}"
-    sudo tox -e "build-${BASE_DISTRO}-${INSTALL_TYPE}"
+
+    python3 -m venv ~/kolla-venv
+    . ~/kolla-venv/bin/activate
+
+    pip install "${KOLLA_SRC_DIR}"
+
+    sudo ~/kolla-venv/bin/kolla-build
+
     # NOTE(yoctozepto): due to debian buster we push after images are built
     # see https://github.com/docker/for-linux/issues/711
     if [[ "debian" == $BASE_DISTRO ]]; then
@@ -106,13 +112,14 @@ function prepare_images {
             sudo docker push $img;
         done
     fi
-    popd
+
+    deactivate
 }
 
+
 setup_openstack_clients
 
-setup_config
-
 RAW_INVENTORY=/etc/kolla/inventory
 tools/kolla-ansible -i ${RAW_INVENTORY} -e ansible_user=$USER -vvv bootstrap-servers &> /tmp/logs/ansible/bootstrap-servers
+
 prepare_images