[Fullstack] Don't install OVN in the fullstack job

It's not needed at all so if we avoid installation, especially from
sources, it may save us few minutes of the job's execution time.
It may also save some resources on the node.

To save a bit more time in the fullstack job's execution this patch also
disables compilation of the OVS from source in that job. We can use OVS
installed from packages provided by the distro instead.

Change-Id: Ic4b6740671e51f0d306967013e3d500f4d0cd6a5

roles/configure_functional_tests/tasks/main.yaml

@@ -15,6 +15,8 @@
         STACK_USER=stack
         OVS_BRANCH={{ OVS_BRANCH }}
         OVN_BRANCH={{ OVN_BRANCH }}
+        BUILD_OVS_FROM_SOURCE={{ BUILD_OVS_FROM_SOURCE }}
+        INSTALL_OVN={{ INSTALL_OVN }}
         # This is DB USER used in e.g. pgsql db
         DATABASE_USER=openstack_citest
 

tools/configure_for_func_testing.sh

@@ -65,6 +65,7 @@ INSTALL_MYSQL_ONLY=${INSTALL_MYSQL_ONLY:-False}
 # The gate should automatically install dependencies.
 INSTALL_BASE_DEPENDENCIES=${INSTALL_BASE_DEPENDENCIES:-$IS_GATE}
 BUILD_OVS_FROM_SOURCE=${BUILD_OVS_FROM_SOURCE:-True}
+INSTALL_OVN=${INSTALL_OVN:-True}
 OVN_BRANCH=${OVN_BRANCH:-main}
 OVS_BRANCH=${OVS_BRANCH:-master}
 
@@ -112,9 +113,12 @@ function _install_base_deps {
         install_package $PACKAGES
 
         source $DEVSTACK_PATH/lib/neutron_plugins/ovn_agent
-        echo_summary "OVN_BRANCH: ${OVN_BRANCH} OVS_BRANCH: ${OVS_BRANCH}"
+        echo_summary "OVS_BRANCH: ${OVS_BRANCH}"
         compile_ovs False /usr /var
+        if [[ "$INSTALL_OVN" == "True" ]]; then
+            echo_summary "OVN_BRANCH: ${OVN_BRANCH}"
             compile_ovn False /usr /var
+        fi
     else
         PACKAGES=$(get_packages general,neutron,q-agt,q-l3,openvswitch)
         PACKAGES=$(echo $PACKAGES | perl -pe 's|python-(?!dev)[^ ]*||g')

zuul.d/base.yaml

@@ -27,6 +27,8 @@
       - ^roles/.*$
       - ^rally-jobs/.*$
     vars:
+      BUILD_OVS_FROM_SOURCE: True
+      INSTALL_OVN: True
       OVN_BRANCH: v21.06.0
       OVS_BRANCH: v2.16.0
       devstack_services:
@@ -49,6 +51,8 @@
     parent: neutron-functional
     vars:
       tox_envlist: dsvm-fullstack-gate
+      BUILD_OVS_FROM_SOURCE: False
+      INSTALL_OVN: False
       zuul_copy_output:
         # We need to copy directory with logs to have it in job artifacts also,
         # /opt/stack/logs is default logs directory defined in neutron's