Add GlobalConfigExtraMapData

Adds a new GlobalConfigExtraMapData parameter that can be used to inject
global_config_settings hieradata into the deployment. Any values generated
in the stack will override those passed in by the parameter value.

This will be used for the distributed compute node when deploying with separate
stacks and data from the control plane stack needs to be injected into the
compute stack.

Change-Id: Id3e52e272bae67ee4036c81b3d7640255e0349ae

overcloud.j2.yaml

@@ -238,6 +238,11 @@ parameters:
     description: >
       List of server hostnames to blacklist from any triggered deployments.
 
+  GlobalConfigExtraMapData:
+    type: json
+    default: {}
+    description: Map of extra global_config_settings data to set on each node.
+
 {% for role in roles %}
 {%- if role.deprecated_param_scheduler_hints is defined or role.deprecated_param_extraconfig is defined %}
 {%- if not parameter_groups_defined|default(false) %}
@@ -449,6 +454,7 @@ resources:
       type: json
       value:
         map_merge:
+          - get_param: GlobalConfigExtraMapData
           - get_attr: [{{role.name}}ServiceChainRoleData, value, config_settings]
           {% for r in roles %}
           - get_attr: [{{r.name}}ServiceChainRoleData, value, global_config_settings]

releasenotes/notes/add-GlobalConfigExtraMapData-793757a2b767abe3.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Adds a new GlobalConfigExtraMapData parameter that can be used to inject
+    global_config_settings hieradata into the deployment. Any values generated
+    in the stack will override those passed in by the parameter value.