bifrost: Use virtual environment for bifrost

bifrost forces us to use an old Ansible version which means we can't
take advantage of new features in XCI playbooks. As such, we move the
entire bifrost step to a virtual environment so we can have a newer
version of Ansible on the host.

Change-Id: I94874d600a29247b7826324cc111901995df90dc
Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/bifrost/scripts/bifrost-provision.sh b/bifrost/scripts/bifrost-provision.sh
index ad02807..0cca82d 100755 (executable)
--- a/bifrost/scripts/bifrost-provision.sh
+++ b/bifrost/scripts/bifrost-provision.sh
@@ -17,7 +17,7 @@ ANSIBLE_INSTALL_ROOT=${ANSIBLE_INSTALL_ROOT:-/opt/stack}
 ANSIBLE_VERBOSITY=${ANSIBLE_VERBOSITY-"-vvvv"}
 ENABLE_VENV="false"
 USE_DHCP="false"
-USE_VENV="false"
+USE_VENV="true"
 BUILD_IMAGE=true
 PROVISION_WAIT_TIMEOUT=${PROVISION_WAIT_TIMEOUT:-3600}
 
@@ -67,6 +67,21 @@ export DIB_OS_PACKAGES=${DIB_OS_PACKAGES:-"vlan,vim,less,bridge-utils,language-p
 # Additional dib elements
 export EXTRA_DIB_ELEMENTS=${EXTRA_DIB_ELEMENTS:-"openssh-server"}
 
+if [ ${USE_VENV} = "true" ]; then
+    export VENV=/opt/stack/bifrost
+    $SCRIPT_HOME/env-setup.sh
+    # Note(cinerama): activate is not compatible with "set -u";
+    # disable it just for this line.
+    set +u
+    source ${VENV}/bin/activate
+    set -u
+    ANSIBLE=${VENV}/bin/ansible-playbook
+    ENABLE_VENV="true"
+else
+    $SCRIPT_HOME/env-setup.sh
+    ANSIBLE=${HOME}/.local/bin/ansible-playbook
+fi
+
 # Source Ansible
 set +x +o nounset
 $SCRIPT_HOME/env-setup.sh