From f84fa55460b662f58bfe634e251c0b2208e3031f Mon Sep 17 00:00:00 2001
From: Denis Makogon <lildee1991@gmail.com>
Date: Fri, 9 Dec 2016 14:48:39 +0200
Subject: [PATCH] Introduce OpenStack API-based function example

---
 examples/openstack-app/Dockerfile       | 12 +++++++
 examples/openstack-app/list_servers.py  | 44 +++++++++++++++++++++++++
 examples/openstack-app/requirements.txt |  3 ++
 picasso/api/views/app.py                |  3 +-
 4 files changed, 60 insertions(+), 2 deletions(-)
 create mode 100644 examples/openstack-app/Dockerfile
 create mode 100644 examples/openstack-app/list_servers.py
 create mode 100644 examples/openstack-app/requirements.txt

diff --git a/examples/openstack-app/Dockerfile b/examples/openstack-app/Dockerfile
new file mode 100644
index 0000000..ea098b9
--- /dev/null
+++ b/examples/openstack-app/Dockerfile
@@ -0,0 +1,12 @@
+FROM python:3.5
+
+ENV PYTHONUNBUFFERED 1
+
+RUN mkdir /code
+WORKDIR /code
+ADD . /code/
+
+
+RUN pip3 install -r /code/requirements.txt
+
+ENTRYPOINT ["python3", "/code/list_servers.py"]
diff --git a/examples/openstack-app/list_servers.py b/examples/openstack-app/list_servers.py
new file mode 100644
index 0000000..49346af
--- /dev/null
+++ b/examples/openstack-app/list_servers.py
@@ -0,0 +1,44 @@
+# All Rights Reserved.
+#
+#    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 sys
+
+from keystoneauth1 import identity
+from keystoneauth1 import session
+from keystoneclient import client as keystone
+
+from novaclient import client as nova
+
+
+num_servers = 0
+
+if not os.isatty(sys.stdin.fileno()):
+    obj = json.loads(sys.stdin.read())
+    auth_url = obj.get("OS_AUTH_URL")
+    x_auth_token = obj.get("OS_TOKEN")
+    project_id = obj.get("OS_PROJECT_ID")
+    auth = identity.Token(auth_url,
+                          token=x_auth_token,
+                          project_id=project_id)
+    sess = session.Session(auth=auth)
+    ks = keystone.Client(session=sess,
+                         project_id=project_id)
+    ks.authenticate(token=x_auth_token)
+
+    nc = nova.Client('2', session=sess)
+    num_servers = len(nc.servers.list())
+
+print("You have", num_servers, "servers.")
diff --git a/examples/openstack-app/requirements.txt b/examples/openstack-app/requirements.txt
new file mode 100644
index 0000000..7233f60
--- /dev/null
+++ b/examples/openstack-app/requirements.txt
@@ -0,0 +1,3 @@
+keystoneauth1==2.15.0 # Apache-2.0
+python-novaclient==6.0.0
+python-keystoneclient==3.6.0 # Apache-2.0
diff --git a/picasso/api/views/app.py b/picasso/api/views/app.py
index 9f5fca7..c3f8fe4 100644
--- a/picasso/api/views/app.py
+++ b/picasso/api/views/app.py
@@ -57,7 +57,6 @@ class AppRouteView(object):
             if hasattr(route, "timeout"):
                 one.update(timeout=route.timeout)
             if hasattr(route, "max_concurrency"):
-                one.update(max_concurrency=
-                           route.max_concurrency)
+                one.update(max_concurrency=route.max_concurrency)
             view.append(one)
         return view