Fix the buildimages jobs: call the ensure-tox role

... and use its output.

tox is not available by default on the images anymore.

Change-Id: If5ea0ffdfc51860842c19f0a6f238127d42eb292

playbooks/buildimages/run.yaml

@@ -1,3 +1,4 @@
 - hosts: all
   roles:
+    - ensure-tox
     - build-sahara-images-dib

roles/build-sahara-images-dib/defaults/main.yaml

@@ -4,3 +4,4 @@ sahara_build_directory: /var/tmp/sahara-image-build
 sahara_plugin: vanilla
 sahara_plugin_version: ''
 sahara_plugin_distro: ''
+tox_executable: 'tox'

roles/build-sahara-images-dib/tasks/main.yaml

@@ -1,4 +1,4 @@
 - name: Build all the images for the selected plugin
-  command: ./tools/gate/build-images "{{ sahara_plugin }}" "{{ sahara_plugin_version }}" "{{ sahara_plugin_distro }}"
+  command: ./tools/gate/build-images "{{ sahara_plugin }}" "{{ sahara_plugin_version }}" "{{ sahara_plugin_distro }}" "{{ tox_executable }}"
   args:
     chdir: "{{ sahara_image_elements_src_dir }}"

tools/gate/build-images

@@ -3,6 +3,7 @@
 PLUGIN=$1
 PLUGIN_VERSION=${2:-''}
 PLUGIN_DISTRO=${3:-''}
+TOX_EXECUTABLE=${4:-'tox'}
 
 export DIB_MIN_TMPFS=10
 
@@ -25,7 +26,7 @@ if [ -n "${PLUGIN}" ] && [ -n "${PLUGIN_VERSION}" ] && [ -n "${PLUGIN_DISTRO}" ]
             VERSION_FLAG=""
             ;;
     esac
-    tox -e venv -- sahara-image-create -x -u -p ${PLUGIN} -i ${PLUGIN_DISTRO} ${VERSION_FLAG}
+    ${TOX_EXECUTABLE} -e venv -- sahara-image-create -x -u -p ${PLUGIN} -i ${PLUGIN_DISTRO} ${VERSION_FLAG}
     exit
 fi
 
@@ -36,7 +37,7 @@ case "$PLUGIN" in
         for distro in ubuntu centos7; do
             # limit to 4 releases
             for version in 2.7.1 2.7.5 2.8.2 3.0.1; do
-                tox -e venv -- sahara-image-create -x -u -p $PLUGIN -i $distro -v $version
+                ${TOX_EXECUTABLE} -e venv -- sahara-image-create -x -u -p $PLUGIN -i $distro -v $version
             done
         done
         ;;
@@ -48,13 +49,13 @@ case "$PLUGIN" in
             # NOTE(vgridnev): Number of versions are growing; testing only 2 latest
             # releases of CDH
             for version in 5.9 5.11; do
-              tox -e venv -- sahara-image-create -x -u -p $PLUGIN -i $distro -v $version
+              ${TOX_EXECUTABLE} -e venv -- sahara-image-create -x -u -p $PLUGIN -i $distro -v $version
               find . -maxdepth 1 -name '*cloudera*.qcow2' -delete
               sudo rm -rf ~/.cache/image-create
             done
         done
         ;;
     *)
-        tox -e venv -- sahara-image-create -x -u -p $PLUGIN
+        ${TOX_EXECUTABLE} -e venv -- sahara-image-create -x -u -p $PLUGIN
         ;;
 esac