Add skeleton for devstack plugin and gate hooks

Change-Id: Ib568436bd8f896fba4fa46e07714c4cb8b889459

contrib/gate_hook.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+set -ex
+
+$BASE/new/devstack-gate/devstack-vm-gate.sh

contrib/post_test_hook.sh

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+#!/bin/bash -xe
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# This script is executed inside post_test_hook function in devstack gate.
+
+cd $BASE/new/devstack
+source openrc admin admin

contrib/pre_test_hook.sh

@@ -0,0 +1,17 @@
+#!/bin/bash -xe
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# This script is executed inside pre_test_hook function in devstack gate.
+
+export localconf=$BASE/new/devstack/local.conf

devstack/plugin.sh

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+#!/usr/bin/env bash
+# plugin.sh - DevStack plugin.sh dispatch script zun-ui
+
+BASE_DIR=$(cd $(dirname $BASH_SOURCE)/.. && pwd)
+
+function install_k8s_cloud_provider {
+    echo_summary "Installing Devstack Plugin"
+}
+
+function init_k8s_cloud_provider {
+    echo_summary "Initialize Devstack Plugin"
+}
+
+function configure_k8s_cloud_provider {
+    echo_summary "Configuring Devstack Plugin"
+}
+
+# check for service enabled
+if is_service_enabled zun-ui; then
+
+    if [[ "$1" == "stack" && "$2" == "pre-install"  ]]; then
+        # Set up system services
+        # no-op
+        :
+
+    elif [[ "$1" == "stack" && "$2" == "install"  ]]; then
+        # Perform installation of service source
+        # no-op
+        :
+
+    elif [[ "$1" == "stack" && "$2" == "post-config"  ]]; then
+        # Configure after the other layer 1 and 2 services have been configured
+        # no-op
+        :
+
+    elif [[ "$1" == "stack" && "$2" == "extra"  ]]; then
+        # no-op
+        :
+    fi
+
+    if [[ "$1" == "unstack"  ]]; then
+        # no-op
+        :
+    fi
+
+    if [[ "$1" == "clean"  ]]; then
+        # Remove state and transient data
+        # Remember clean.sh first calls unstack.sh
+        # no-op
+        :
+    fi
+fi

devstack/settings

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+# settings file for devstack plugin
+enable_service k8s_cloud_provider