Add NPWG Multi-VIF driver option in devstack

In devstack plugin, add KURYR_MULTI_VIF_DRIVER parameter to
specify which multi-vif driver to be enabled. If it's NPWG
driver, the network attachemnt definition CRD is created in
Kubernetes cluster.

Change-Id: I260a44880b9cfb3686843504bd29649e5d0518d0

devstack/local.conf.sample

@@ -241,6 +241,11 @@ enable_service kuryr-daemon
 # configured with the nested driver
 # KURYR_VIF_POOL_MANAGER=True
 
+# Kuryr Multi-VIF Driver
+# Uncomment the next line to enable the npwg multi-vif driver.
+# Default value: noop
+# KURYR_MULTI_VIF_DRIVER=npwg_multiple_interfaces
+
 # Increase Octavia amphorae timeout so that the first LB amphora has time to
 # build and boot
 if [[ "$KURYR_K8S_LBAAS_USE_OCTAVIA" == "True" ]]; then

devstack/plugin.sh

@@ -62,6 +62,9 @@ function configure_kuryr {
         iniset "$KURYR_CONFIG" kubernetes ssl_ca_crt_file "$KURYR_K8S_API_CACERT"
         iniset "$KURYR_CONFIG" kubernetes ssl_verify_server_crt True
     fi
+    if [ "$KURYR_MULTI_VIF_DRIVER" ]; then
+        iniset "$KURYR_CONFIG" kubernetes multi_vif_drivers "$KURYR_MULTI_VIF_DRIVER"
+    fi
     # REVISIT(ivc): 'use_stderr' is required for current CNI driver. Once a
     # daemon-based CNI driver is implemented, this could be removed.
     iniset "$KURYR_CONFIG" DEFAULT use_stderr true
@@ -893,7 +896,9 @@ if [[ "$1" == "stack" && "$2" == "extra" ]]; then
                 generate_containerized_kuryr_resources False
             fi
         fi
-
+        if [ "$KURYR_MULTI_VIF_DRIVER" == "npwg_multiple_interfaces" ]; then
+            /usr/local/bin/kubectl apply -f ${KURYR_HOME}/kubernetes_crds/network_attachment_definition_crd.yaml
+        fi
     fi
 
 elif [[ "$1" == "stack" && "$2" == "test-config" ]]; then
@@ -942,6 +947,9 @@ elif [[ "$1" == "stack" && "$2" == "test-config" ]]; then
     if is_service_enabled tempest && [[ "$KURYR_K8S_SERIAL_TESTS" == "True" ]]; then
         iniset $TEMPEST_CONFIG kuryr_kubernetes run_tests_serial True
     fi
+    if is_service_enabled tempest && [[ "$KURYR_MULTI_VIF_DRIVER" == "npwg_multiple_interfaces" ]]; then
+        iniset $TEMPEST_CONFIG kuryr_kubernetes npwg_multi_vif_enabled True
+    fi
 fi
 
 if [[ "$1" == "unstack" ]]; then

doc/source/installation/multi_vif_with_npwg_spec.rst

@@ -27,17 +27,17 @@ followed:
     version: v1
     scope: Namespaced
     names:
-        plural: network-attachment-definitions
-        singular: network-attachment-definition
-        kind: NetworkAttachmentDefinition
-        shortNames:
-        - net-attach-def
+      plural: network-attachment-definitions
+      singular: network-attachment-definition
+      kind: NetworkAttachmentDefinition
+      shortNames:
+      - net-attach-def
     validation:
-        openAPIV3Schema:
+      openAPIV3Schema:
         properties:
-            spec:
+          spec:
             properties:
-                config:
+              config:
                 type: string
     EOF
     $ kubectl apply -f nad.yal

kubernetes_crds/network_attachment_definition_crd.yaml

@@ -0,0 +1,21 @@
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  name: network-attachment-definitions.k8s.cni.cncf.io
+spec:
+  group: k8s.cni.cncf.io
+  version: v1
+  scope: Namespaced
+  names:
+    plural: network-attachment-definitions
+    singular: network-attachment-definition
+    kind: NetworkAttachmentDefinition
+    shortNames:
+    - net-attach-def
+  validation:
+    openAPIV3Schema:
+      properties:
+        spec:
+          properties:
+            config:
+              type: string