Use adaptive process spawning

Plus, synch the barbican devstack lib with upstream repo

Change-Id: I3a8bf5fefa93e54981880200903b61b27989fb84

openstack_operator/operator.py

@@ -87,7 +87,7 @@ def deploy(name, namespace, new, **_):
     """
 
     utils.create_or_update('operator/namespace.yml.j2')
-    utils.create_or_update('operator/uwsgidefaultconfig.yml.j2')
+    utils.deploy_uwsgi_config()
 
     config = utils.to_dict(new['data']['operator-config.yaml'])
 

openstack_operator/templates/operator/uwsgidefaultconfig.yml.j2

@@ -7,7 +7,10 @@ data:
   uwsgi.ini: |-
     [uwsgi]
     enable-threads = true
-    workers = %(%k * 1)
+    workers = %(%k / 4)
+    cheaper = 2
+    cheaper-step = 1
+    cheaper-initial = 2
     exit-on-reload = true
     die-on-term = true
     lazy-apps = true

openstack_operator/utils.py

@@ -295,3 +295,11 @@ def deploy_memcached(name, **_):
     it's meant to be here to be consumed/called by the serices.
     """
     create_or_update('operator/memcached.yml.j2', name=name)
+
+
+def deploy_uwsgi_config():
+    """Deploy a default configmap for uwsgi apps
+
+    This function deploys a default configmap for uwsgi apps."""
+
+    create_or_update('operator/uwsgidefaultconfig.yml.j2')