Designate: support configuring non-ooo-deployed binds

Colloquially referred to as "bring your own bind", this allows designate
to be configured with external bind instances.

Depends-On: https://review.opendev.org/c/openstack/tripleo-ansible/+/847803
Change-Id: I797ae348065cc70ecafd72440c01773a6c9c8764

deployment/designate/designate-central-container-puppet.yaml

@@ -75,6 +75,7 @@ parameters:
                  unset results in service defaults being used.
     type: string
     default: ''
+
   DesignateRndcKey:
     description: The rndc key secret for communication with BIND.
     type: string
@@ -84,6 +85,26 @@ parameters:
                  on the external/public access network.
     type: number
     default: 16000
+  DesignateExternalBindServers:
+    description: >
+      Used to configure desginate with bind servers managed
+      externally to the overcloud. Example format:
+      [ {
+          # entry with minimal required values
+          "host": "10.4.22.99",
+          "rndc_key": "FJOdVqZr5gVXbU9kIagY0IJVDq7CV/mDVb/M7mlLMgY="
+        },
+        {
+          "host": "10.5.22.99",
+          "port": "53",
+          "rndc_host": "10.5.22.98",
+          "rndc_port": "953",
+          "rndc_key": "FJOdVqZr5gVXbU9kIagY0IJVDq7CV/mDVb/M7mlLMgY="
+        }
+      ]
+    type: json
+    default: []
+    hidden: true
 
 conditions:
   designate_workers_set:
@@ -215,6 +236,7 @@ outputs:
             alternate_bind: true
             designate_rndc_key: {get_param: DesignateRndcKey}
             minidns_proxy_base_port: {get_param: DesignateMdnsProxyBasePort}
+            tripleo_external_bind_servers: {get_param: DesignateExternalBindServers}
       docker_config:
         # db sync runs before permissions set by kolla_config
         step_2:

deployment/designate/designate-worker-container-puppet.yaml

@@ -53,6 +53,26 @@ parameters:
     description: The rndc key secret for communication with BIND.
     type: string
     hidden: true
+  DesignateExternalBindServers:
+    description: >
+      Used to configure desginate with bind servers managed
+      externally to the overcloud. Example format:
+      [ {
+          # entry with minimal required values
+          "host": "10.4.22.99",
+          "rndc_key": "FJOdVqZr5gVXbU9kIagY0IJVDq7CV/mDVb/M7mlLMgY="
+        },
+        {
+          "host": "10.5.22.99",
+          "port": "53",
+          "rndc_host": "10.5.22.98",
+          "rndc_port": "953",
+          "rndc_key": "FJOdVqZr5gVXbU9kIagY0IJVDq7CV/mDVb/M7mlLMgY="
+        }
+      ]
+    type: json
+    default: []
+    hidden: true
 
 conditions:
   designate_workers_zero: {equals : [{get_param: DesignateWorkers}, 0]}
@@ -144,6 +164,7 @@ outputs:
                 name: designate_rndc_config
             vars:
                 designate_rndc_key: {get_param: DesignateRndcKey}
+                tripleo_external_bind_servers: {get_param: DesignateExternalBindServers}
       docker_config:
         step_4:
           designate_worker:

deployment/unbound/unbound-container-ansible.yaml

@@ -89,6 +89,26 @@ parameters:
                  the request. It will only answer for queries using local
                  information.
     type: boolean
+  DesignateExternalBindServers:
+    description: >
+      Used to configure desginate with bind servers managed
+      externally to the overcloud. Example format:
+      [ {
+          # entry with minimal required values
+          "host": "10.4.22.99",
+          "rndc_key": "FJOdVqZr5gVXbU9kIagY0IJVDq7CV/mDVb/M7mlLMgY="
+        },
+        {
+          "host": "10.5.22.99",
+          "port": "53",
+          "rndc_host": "10.5.22.98",
+          "rndc_port": "953",
+          "rndc_key": "FJOdVqZr5gVXbU9kIagY0IJVDq7CV/mDVb/M7mlLMgY="
+        }
+      ]
+    type: json
+    default: []
+    hidden: true
 
 
 resources:
@@ -191,3 +211,4 @@ outputs:
             tripleo_unbound_forward_resolvers: {get_param: UnboundForwardResolvers}
             tripleo_unbound_forward_fallback: {get_param: UnboundForwardFallback}
             tripleo_unbound_allow_recursion: {get_param: UnboundAllowRecursion}
+            tripleo_external_bind_servers: {get_param: DesignateExternalBindServers}