@@ -174,9 +174,7 @@ function create_neutron_initial_network {

         fi

     fi

-    AUTO_ALLOCATE_EXT=$(neutron --os-cloud devstack-admin --os-region "$REGION_NAME" ext-list | grep 'auto-allocated-topology' | get_field 1)

-    SUBNETPOOL_EXT=$(neutron --os-cloud devstack-admin --os-region "$REGION_NAME" ext-list | grep 'subnet_allocation' | get_field 1)

-    if is_service_enabled q-l3; then

+    if is_networking_extension_supported "router" && is_networking_extension_supported "external-net"; then

         # Create a router, and add the private subnet as one of its interfaces

         if [[ "$Q_L3_ROUTER_PER_TENANT" == "True" ]]; then

             # create a tenant-owned router.

@@ -188,10 +186,8 @@ function create_neutron_initial_network {

             die_if_not_set $LINENO ROUTER_ID "Failure creating ROUTER_ID for $Q_ROUTER_NAME"

         fi

-        # if the extension is available, then mark the external

-        # network as default, and provision default subnetpools

         EXTERNAL_NETWORK_FLAGS="--router:external"

-        if [[ -n $AUTO_ALLOCATE_EXT && -n $SUBNETPOOL_EXT ]]; then

+        if is_networking_extension_supported "auto-allocated-topology" && is_networking_extension_supported "subnet_allocation"; then

             EXTERNAL_NETWORK_FLAGS="$EXTERNAL_NETWORK_FLAGS --is-default"

             if [[ "$IP_VERSION" =~ 4.* ]]; then

                 SUBNETPOOL_V4_ID=$(neutron --os-cloud devstack-admin --os-region "$REGION_NAME" subnetpool-create $SUBNETPOOL_NAME --default-prefixlen $SUBNETPOOL_SIZE_V4 --pool-prefix $SUBNETPOOL_PREFIX_V4 --shared --is-default=True | grep ' id ' | get_field 2)

@@ -363,3 +359,10 @@ function is_provider_network {

     fi

     return 1

 }

+

+function is_networking_extension_supported {

+    local extension=$1

+    # TODO(sc68cal) cache this instead of calling every time

+    EXT_LIST=$(neutron --os-cloud devstack-admin --os-region "$REGION_NAME" ext-list -c alias -f value)

+    [[ $EXT_LIST =~ $extension ]] && return 0

+}

@@ -240,8 +240,7 @@ function configure_tempest {

     # the public network (for floating ip access) is only available

     # if the extension is enabled.

-    EXTERNAL_NETWORK_EXT=$(neutron ext-list | grep 'external-net' | get_field 1)

-    if [[ -n $EXTERNAL_NETWORK_EXT ]]; then

+    if is_networking_extension_supported 'external-net'; then

         public_network_id=$(neutron net-list | grep $PUBLIC_NETWORK_NAME | \

             awk '{print $2}')

     fi