Add region support

Now Heat is missing the region support for software deployment
and so did os-collect-config. This patch fixes it but keeps the
backward compatibility.

For changes in Heat pls refer Iec6f3606c9fdf8474f393b0990356f34d38bcf75
and https://review.openstack.org/580470

For changes in Heat agents please refer
I8e0518fa61e237ec055834dd4bebe0fc87cd6627

Story: 2002781

Change-Id: I88182a9a9af74e9760b2ec9b500971f06293f0b8
(cherry picked from commit 5bebbf1654)

os_collect_config/heat.py

@@ -37,6 +37,8 @@ opts = [
                help='ID of the stack this deployment belongs to'),
     cfg.StrOpt('resource-name',
                help='Name of resource in the stack to be polled'),
+    cfg.StrOpt('region-name',
+               help='Region Name for extracting Heat endpoint'),
 ]
 name = 'heat'
 
@@ -69,6 +71,8 @@ class Collector(object):
         if CONF.heat.resource_name is None:
             logger.info('No resource_name configured.')
             raise exc.HeatMetadataNotConfigured
+        # NOTE(flwang): To be compatible with old versions, we won't throw
+        # error here if there is no region name.
 
         try:
             ks = keystone.Keystone(
@@ -78,8 +82,11 @@ class Collector(object):
                 project_id=CONF.heat.project_id,
                 keystoneclient=self.keystoneclient,
                 discover_class=self.discover_class).client
-            endpoint = ks.service_catalog.url_for(
-                service_type='orchestration', endpoint_type='publicURL')
+            kwargs = {'service_type': 'orchestration',
+                      'endpoint_type': 'publicURL'}
+            if CONF.heat.region_name:
+                kwargs['region_name'] = CONF.heat.region_name
+            endpoint = ks.service_catalog.url_for(**kwargs)
             logger.debug('Fetching metadata from %s' % endpoint)
             heat = self.heatclient.Client(
                 '1', endpoint, token=ks.auth_token)

os_collect_config/zaqar.py

@@ -43,6 +43,8 @@ opts = [
     cfg.BoolOpt('use-websockets',
                 default=False,
                 help='Use the websocket transport to connect to Zaqar.'),
+    cfg.StrOpt('region-name',
+               help='Region Name for extracting Zaqar endpoint'),
 ]
 name = 'zaqar'
 
@@ -59,9 +61,10 @@ class Collector(object):
         self.transport = transport
 
     def get_data_wsgi(self, ks, conf):
-
-            endpoint = ks.service_catalog.url_for(
-                service_type='messaging', endpoint_type='publicURL')
+        kwargs = {'service_type': 'messaging', 'endpoint_type': 'publicURL'}
+        if CONF.zaqar.region_name:
+            kwargs['region_name'] = CONF.zaqar.region_name
+        endpoint = ks.service_catalog.url_for(**kwargs)
         logger.debug('Fetching metadata from %s' % endpoint)
         zaqar = self.zaqarclient.Client(endpoint, conf=conf, version=1.1)
 
@@ -73,9 +76,11 @@ class Collector(object):
         return request.Request(endpoint, action, content=json.dumps(body))
 
     def get_data_websocket(self, ks, conf):
-
-        endpoint = ks.service_catalog.url_for(
-            service_type='messaging-websocket', endpoint_type='publicURL')
+        kwargs = {'service_type': 'messaging-websocket',
+                  'endpoint_type': 'publicURL'}
+        if CONF.zaqar.region_name:
+            kwargs['region_name'] = CONF.zaqar.region_name
+        endpoint = ks.service_catalog.url_for(**kwargs)
 
         logger.debug('Fetching metadata from %s' % endpoint)
 
@@ -129,6 +134,8 @@ class Collector(object):
         if CONF.zaqar.queue_id is None:
             logger.warn('No queue_id configured.')
             raise exc.ZaqarMetadataNotConfigured()
+        # NOTE(flwang): To be compatible with old versions, we won't throw
+        # error here if there is no region name.
 
         try:
             ks = keystone.Keystone(