Switch to devstack plugin

Start using devstack's feature 'Externally Hosted Plugins' [1], that allows
to install Mistral using upstream Devstack without need to put some additional
files manually.
To enable Mistral with Devstack just put following in local[rc] file:
enable_plugin mistral https://github.com/openstack/mistral

[1] http://docs.openstack.org/developer/devstack/plugins.html#externally-hosted-plugins

Implements blueprint devstack-plugin

Change-Id: Ia2f188a6eb369a495a7e0f20534fdd02bafcf49a

README.rst

@@ -37,7 +37,7 @@ First of all, clone the repo and go to the repo directory::
 
 **Devstack installation**
 
-Information about how to install Mistral with devstack can be found here: https://github.com/openstack/mistral/tree/master/contrib/devstack
+Information about how to install Mistral with devstack can be found here: https://github.com/openstack/mistral/tree/master/devstack
 
 **Virtualenv installation**::
 

contrib/devstack/README.rst

@@ -1,35 +0,0 @@
-#. Follow Devstack documentation to setup a host for Devstack. Then clone
-   Devstack source code::
-
-      $ git clone https://github.com/openstack-dev/devstack
-
-#. Clone Mistral source code::
-
-      $ git clone https://github.com/openstack/mistral
-
-#. Copy Mistral integration scripts to Devstack::
-
-      $ cp mistral/contrib/devstack/lib/mistral ${DEVSTACK_DIR}/lib
-      $ cp mistral/contrib/devstack/extras.d/70-mistral.sh ${DEVSTACK_DIR}/extras.d/
-
-#. Create/modify a ``localrc`` file as input to devstack::
-
-      $ cd devstack
-      $ touch localrc
-
-#. The Mistral service is not enabled by default, so it must be enabled in ``localrc``
-   before running ``stack.sh``. This example of ``localrc``
-   file shows all of the settings required for Mistral::
-
-      # Enable Mistral
-      enable_service mistral
-
-#. Deploy your OpenStack Cloud with Mistral::
-
-   $ ./stack.sh
-
-
-Note:
-
-#. All needed keystone endpoints for Mistral will be automatically created during installation.
-#. Python-mistralclient will be also cloned and installed automatically.

contrib/devstack/extras.d/70-mistral.sh

@@ -1,23 +0,0 @@
-# 70-mistral.sh - DevStack extras script to install Mistral
-
-if is_service_enabled mistral; then
-    if [[ "$1" == "source" ]]; then
-        # Initial source
-        source $TOP_DIR/lib/mistral
-    elif [[ "$1" == "stack" && "$2" == "install" ]]; then
-        echo_summary "Installing mistral"
-        install_mistral
-    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
-        echo_summary "Configuring mistral"
-        configure_mistral
-        create_mistral_accounts
-    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
-        echo_summary "Initializing mistral"
-        init_mistral
-        start_mistral
-    fi
-
-    if [[ "$1" == "unstack" ]]; then
-        stop_mistral
-    fi
-fi

devstack/README.rst

@@ -0,0 +1,16 @@
+======================
+ Enabling in Devstack
+======================
+
+1. Download DevStack::
+
+    git clone https://github.com/openstack-dev/devstack.git
+    cd devstack
+
+2. Add this repo as an external repository::
+
+     > cat local.conf
+     [[local|localrc]]
+     enable_plugin mistral https://github.com/openstack/mistral
+
+3. run ``stack.sh``

devstack/plugin.sh

@@ -1,22 +1,9 @@
-# lib/mistral
-
-# Dependencies:
-# ``functions`` file
-# ``DEST``, ``DATA_DIR``, ``STACK_USER`` must be defined
-
-# ``stack.sh`` calls the entry points in this order:
-#
-# install_mistral
-# configure_mistral
-# start_mistral
-# stop_mistral
-
+# Setting configuration file for Mistral services
 
 # Save trace setting
 XTRACE=$(set +o | grep xtrace)
 set -o xtrace
 
-
 # Defaults
 # --------
 
@@ -136,11 +123,12 @@ function install_mistral {
     # both functions (setup_develop and setup_package) are defined at:
     # http://git.openstack.org/cgit/openstack-dev/devstack/tree/functions-common
     setup_package $MISTRAL_DIR -e
-    
+
     # installing python-nose.
     real_install_package python-nose
 }
 
+
 function install_mistral_pythonclient {
     git_clone $MISTRAL_PYTHONCLIENT_REPO $MISTRAL_PYTHONCLIENT_DIR $MISTRAL_PYTHONCLIENT_BRANCH
     local tags=`git --git-dir=$MISTRAL_PYTHONCLIENT_DIR/.git tag -l | grep 2015`
@@ -164,6 +152,26 @@ function stop_mistral {
 }
 
 
+if is_service_enabled mistral; then
+    if [[ "$1" == "stack" && "$2" == "install" ]]; then
+        echo_summary "Installing mistral"
+        install_mistral
+    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+        echo_summary "Configuring mistral"
+        configure_mistral
+        create_mistral_accounts
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        echo_summary "Initializing mistral"
+        init_mistral
+        start_mistral
+    fi
+
+    if [[ "$1" == "unstack" ]]; then
+        stop_mistral
+    fi
+fi
+
+
 # Restore xtrace
 $XTRACE
 

devstack/settings

@@ -0,0 +1,5 @@
+# Devstack settings
+
+# We have to add Mistral to enabled services for screen_it to work
+
+enable_service mistral

functionaltests/pre_test_hook.sh

@@ -1,22 +0,0 @@
-#!/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.
-
-# This script is executed inside pre_test_hook function in desvstack gate.
-
-# Install Mistral devstack integration
-MISTRAL_BASE=/opt/stack/new/mistral/contrib/devstack
-DEVSTACK_BASE=/opt/stack/new/devstack
-cp $MISTRAL_BASE/lib/* $DEVSTACK_BASE/lib
-cp $MISTRAL_BASE/extras.d/* $DEVSTACK_BASE/extras.d
-