Add support for use-internal-endpoints

Add support for use of internal endpoints for inter-service
API calls from heat.

Change-Id: I4a9399e84f3a6ad90a935f12407b4365f35841cb
Closes-Bug: 1713923

config.yaml

@@ -247,3 +247,10 @@ options:
     description: |
       Default multicast port number that will be used to communicate between
       HA Cluster nodes.
+  use-internal-endpoints:
+    type: boolean
+    default: False
+    description: |
+      Openstack mostly defaults to using public endpoints for
+      internal communication between services. If set to True this option
+      will configure services to use internal endpoints where possible.

hooks/heat_utils.py

@@ -103,6 +103,7 @@ CONFIG_FILES = OrderedDict([
                      context.SharedDBContext(relation_prefix='heat',
                                              ssl_dir=HEAT_DIR),
                      context.OSConfigFlagContext(),
+                     context.InternalEndpointContext(),
                      HeatIdentityServiceContext(service=SVC, service_user=SVC),
                      HeatHAProxyContext(),
                      HeatSecurityContext(),

templates/icehouse/heat.conf

@@ -85,3 +85,8 @@ bind_port={{ api_cfn_listen_port }}
 bind_port=8000
 {% endif %}
 workers = {{ workers }}
+
+{% if use_internal_endpoints -%}
+[clients]
+endpoint_type = internalURL
+{%- endif %}

templates/kilo/heat.conf

@@ -62,3 +62,7 @@ workers = {{ workers }}
 
 {% include "section-rabbitmq-oslo" %}
 
+{% if use_internal_endpoints -%}
+[clients]
+endpoint_type = internalURL
+{%- endif %}

templates/liberty/heat.conf

@@ -75,3 +75,7 @@ workers = {{ workers }}
 
 {% include "section-rabbitmq-oslo" %}
 
+{% if use_internal_endpoints -%}
+[clients]
+endpoint_type = internalURL
+{%- endif %}

templates/mitaka/heat.conf

@@ -66,3 +66,7 @@ workers = {{ workers }}
 
 {% include "section-rabbitmq-oslo" %}
 
+{% if use_internal_endpoints -%}
+[clients]
+endpoint_type = internalURL
+{%- endif %}