Add tests and example template for atomic hook

Atomic hook can be used with bootconfig to deply containers using
atomic tool in rhel 7.1. This patch adds test and exmaple template
for the hook.

Change-Id: I0f2469225027f3d37c7dd59f85dee8b5aa24a874

hot/software-config/example-templates/example-pristine-atomic-tool.yaml

@@ -0,0 +1,68 @@
+heat_template_version: 2014-10-16
+description: >
+  A template which demonstrates doing boot-time deployment of docker
+  container with atomic tool.
+  This template expects to be created with an environment which defines
+  the resource type Heat::InstallConfigAgent such as
+  ../boot-config/container_agent_env.yaml
+parameters:
+  key_name:
+    type: string
+    default: heat_key
+  flavor:
+    type: string
+    default: m1.small
+  image:
+    type: string
+    default: rhel-atomic
+  private_net:
+    type: string
+    default: private
+  public_net:
+    type: string
+    default: public
+resources:
+  atomic_install_config:
+    type: OS::Heat::StructuredConfig
+    properties:
+      group: atomic
+      config:
+        command: install
+        image: imain/atomic-install-rabbitmq
+
+  atomic_install_deployment:
+    type: OS::Heat::StructuredDeployment
+    properties:
+      name: atomic_deployment
+      config:
+        get_resource: atomic_install_config
+      server:
+        get_resource: server
+
+  boot_config:
+    type: Heat::InstallConfigAgent
+
+  server:
+    type: OS::Nova::Server
+    properties:
+      image: {get_param: image}
+      flavor: {get_param: flavor}
+      key_name: {get_param: key_name}
+      networks:
+      - network: {get_param: private_net}
+      user_data_format: SOFTWARE_CONFIG
+      user_data: {get_attr: [boot_config, config]}
+
+outputs:
+  result:
+    value:
+      get_attr: [atomic_install_deployment, result]
+  stdout:
+    value:
+      get_attr: [atomic_install_deployment, deploy_stdout]
+  stderr:
+    value:
+      get_attr: [atomic_install_deployment, deploy_stderr]
+  status_code:
+    value:
+      get_attr: [atomic_install_deployment, deploy_status_code]

hot/software-config/example-templates/example-pristine-atomic-tool_env.yaml

@@ -0,0 +1,2 @@
+resource_registry:
+  "Heat::InstallConfigAgent": ../boot-config/templates/install_container_agent.yaml

tests/software_config/test_hook_atomic.py

@@ -0,0 +1,115 @@
+#
+#    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.
+
+import json
+import os
+
+import fixtures
+
+from tests.software_config import common
+
+
+class HookAtomicTest(common.RunScriptTest):
+    data = {
+        "id": "abcdef001",
+        "group": "atomic",
+        "inputs": [],
+        "config": {
+            "command": "install",
+            "image": "imain/atomic-install-rabbitmq"
+        }
+    }
+
+    def setUp(self):
+        super(HookAtomicTest, self).setUp()
+        self.hook_path = self.relative_path(
+            __file__,
+            '../..',
+            'hot/software-config/heat-container-agent',
+            'scripts/hooks/atomic')
+
+        self.fake_tool_path = self.relative_path(
+            __file__,
+            'config-tool-fake.py')
+
+        self.working_dir = self.useFixture(fixtures.TempDir())
+        self.outputs_dir = self.useFixture(fixtures.TempDir())
+        self.test_state_path = self.outputs_dir.join('test_state.json')
+
+        self.env = os.environ.copy()
+        self.env.update({
+            'HEAT_ATOMIC_WORKING': self.working_dir.join(),
+            'HEAT_ATOMIC_CMD': self.fake_tool_path,
+            'TEST_STATE_PATH': self.test_state_path,
+        })
+
+    def test_hook(self):
+
+        self.env.update({
+            'TEST_RESPONSE': json.dumps({
+                'stdout': 'Downloading xxx',
+                'stderr': ''
+            })
+        })
+        returncode, stdout, stderr = self.run_cmd(
+            [self.hook_path], self.env, json.dumps(self.data))
+
+        self.assertEqual(0, returncode, stderr)
+
+        self.assertEqual({
+            'deploy_stdout': 'Downloading xxx',
+            'deploy_stderr': '',
+            'deploy_status_code': 0
+        }, json.loads(stdout))
+
+        state = self.json_from_file(self.test_state_path)
+        self.assertEqual(
+            [
+                self.fake_tool_path,
+                'install',
+                'imain/atomic-install-rabbitmq',
+                '-n abcdef001',
+                ''
+            ],
+            state['args'])
+
+    def test_hook_failed(self):
+
+        self.env.update({
+            'TEST_RESPONSE': json.dumps({
+                'stdout': '',
+                'stderr': 'Container exists...',
+                'returncode': 1
+            })
+        })
+        returncode, stdout, stderr = self.run_cmd(
+            [self.hook_path], self.env, json.dumps(self.data))
+
+        self.assertEqual(0, returncode, stderr)
+
+        self.assertEqual({
+            'deploy_stdout': '',
+            'deploy_stderr': 'Container exists...',
+            'deploy_status_code': 1
+        }, json.loads(stdout))
+
+        state = self.json_from_file(self.test_state_path)
+        self.assertEqual(
+            [
+                self.fake_tool_path,
+                'install',
+                'imain/atomic-install-rabbitmq',
+                '-n abcdef001',
+                ''
+            ],
+            state['args'])