Add Mistral client plugin

Change-Id: I9593e7a13d630ad4aa166dd1cdc88abd9b8eaf67
Implements: partial blueprint mistral-resources-for-heat

contrib/heat_mistral/README.md

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+Mistral plugin for OpenStack Heat
+================================
+
+This plugin enables using Mistral resources in a Heat template.
+
+
+### 1. Install the Mistral plugin in Heat
+
+NOTE: These instructions assume the value of heat.conf plugin_dirs includes the
+default directory /usr/lib/heat.
+
+To install the plugin, from this directory run:
+    sudo python ./setup.py install
+
+### 2. Restart heat
+
+Only the process "heat-engine" needs to be restarted to load the newly installed
+plugin.

contrib/heat_mistral/heat_mistral/client.py

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+#
+#    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.
+
+from oslo.utils import importutils
+
+from heat.engine.clients import client_plugin
+
+mistral_base = importutils.try_import('mistralclient.api.base')
+mistral_client = importutils.try_import('mistralclient.api.client')
+
+
+class MistralClientPlugin(client_plugin.ClientPlugin):
+
+    def _create(self):
+        endpoint_type = self._get_client_option('mistral', 'endpoint_type')
+        endpoint = self.url_for(service_type='workflowv2',
+                                endpoint_type=endpoint_type)
+
+        args = {
+            'mistral_url': endpoint,
+            'auth_token': self.auth_token
+        }
+
+        client = mistral_client.client(**args)
+        return client
+
+    def is_not_found(self, ex):
+        return (isinstance(ex, mistral_base.APIException) and
+                ex.error_code == 404)
+
+    def is_over_limit(self, ex):
+        return (isinstance(ex, mistral_base.APIException) and
+                ex.error_code == 413)
+
+    def is_conflict(self, ex):
+        return (isinstance(ex, mistral_base.APIException) and
+                ex.error_code == 409)

contrib/heat_mistral/requirements.txt

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+python-mistralclient

contrib/heat_mistral/setup.cfg

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+[metadata]
+name = heat-contrib-mistral
+summary = Heat resources for Mistral
+description-file =
+    README.md
+author = OpenStack
+author-email = openstack-dev@lists.openstack.org
+home-page = http://www.openstack.org/
+classifier =
+    Environment :: OpenStack
+    Intended Audience :: Information Technology
+    Intended Audience :: System Administrators
+    License :: OSI Approved :: Apache Software License
+    Operating System :: POSIX :: Linux
+    Programming Language :: Python
+    Programming Language :: Python :: 2
+    Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 2.6
+
+[files]
+packages =
+    heat_mistral
+
+# Copy to /usr/lib/heat for plugin loading
+data_files =
+    lib/heat/mistral = heat_mistral/resources/*
+
+[entry_points]
+heat.clients =
+    mistral = heat_mistral.client:MistralClientPlugin
+
+[global]
+setup-hooks =
+    pbr.hooks.setup_hook

contrib/heat_mistral/setup.py

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+#!/usr/bin/env python
+#
+# 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 FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
+import setuptools
+
+# In python < 2.7.4, a lazy loading of package `pbr` will break
+# setuptools if some other modules registered functions in `atexit`.
+# solution from: http://bugs.python.org/issue15881#msg170215
+try:
+    import multiprocessing  # noqa
+except ImportError:
+    pass
+
+setuptools.setup(
+    setup_requires=['pbr'],
+    pbr=True)