Heat stack creation with tags

Sahara should create heat stack with tags to
hide these stack from users.

Change-Id: I7656608ae4e8d24eca7eaf6e186ea3f5cbf1d02d
Closes-bug: 1495991

sahara/config.py

@@ -129,6 +129,7 @@ def list_opts():
     from sahara.conductor import api
     from sahara import main as sahara_main
     from sahara.service.edp import job_utils
+    from sahara.service.heat import heat_engine
     from sahara.service import periodic
     from sahara.utils import cluster_progress_ops as cpo
     from sahara.utils.openstack import base
@@ -157,7 +158,8 @@ def list_opts():
                          proxy.opts,
                          cpo.event_log_opts,
                          wsgi.wsgi_opts,
-                         base.opts)),
+                         base.opts,
+                         heat_engine.heat_engine_opts)),
         (poll_utils.timeouts.name,
          itertools.chain(poll_utils.timeouts_opts)),
         (api.conductor_group.name,

sahara/service/heat/heat_engine.py

@@ -42,6 +42,13 @@ ROLLBACK_STAGES = [c_u.CLUSTER_STATUS_ROLLBACK_SPAWNING,
                    c_u.CLUSTER_STATUS_ROLLBACK_WAITING,
                    c_u.CLUSTER_STATUS_ROLLBACK__PREPARING]
 
+heat_engine_opts = [
+    cfg.ListOpt('heat_stack_tags', default=['data-processing-cluster'],
+                help="List of tags to be used during operating with stack.")
+]
+
+CONF.register_opts(heat_engine_opts)
+
 
 class HeatEngine(e.Engine):
     def get_type_and_version(self):

sahara/service/heat/templates.py

@@ -126,6 +126,9 @@ class ClusterStack(object):
             'template': main_tmpl,
             'files': self.files}
 
+        if CONF.heat_stack_tags:
+            kwargs['tags'] = ",".join(CONF.heat_stack_tags)
+
         if not update_existing:
             LOG.debug("Creating Heat stack with args: {args}"
                       .format(args=kwargs))

sahara/utils/openstack/heat.py

@@ -55,7 +55,8 @@ def client():
 
 def get_stack(stack_name, raise_on_missing=True):
     for stack in base.execute_with_retries(
-            client().stacks.list, filters={'name': stack_name}):
+            client().stacks.list, show_hidden=True,
+            filters={'name': stack_name}):
         return stack
 
     if not raise_on_missing: