Add resource to create haproxy endpoints dynamically

With this resource we can add the values needed for haproxy via t-h-t,
instead of having everything in the haproxy manifest. Right now nothing
is using it, but subsequent and per-service changes will come.

Change-Id: I8ab49c0b8d8f42ce68c0c7fe3ef8067a7d0da3c0

manifests/haproxy.pp

@@ -851,6 +851,9 @@ class tripleo::haproxy (
     manage_firewall             => $manage_firewall,
   }
 
+  $service_names = hiera('enabled_services', [])
+  tripleo::haproxy::service_endpoints { $service_names: }
+
   if $haproxy_stats {
     if $haproxy_stats_certificate {
       $haproxy_stats_certificate_real = $haproxy_stats_certificate

manifests/haproxy/service_endpoints.pp

@@ -0,0 +1,38 @@
+# Copyright 2017 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# == Define: tripleo::haproxy::service_endpoints
+#
+# Define used to create haproxyendpoints for composable services.
+#
+# === Parameters:
+#
+# [*service_name*]
+#  (optional) The service_name to create the service endpoint(s) for.
+#  Defaults to $title
+#
+define tripleo::haproxy::service_endpoints ($service_name = $title) {
+
+  $underscore_name = regsubst($service_name, '-', '_')
+
+  # This allows each composable service to load its own custom rules by
+  # creating its own flat hiera key named:
+  #   tripleo.<service name with underscores>.haproxy_endpoints
+  $service_endpoints = hiera("tripleo.${underscore_name}.haproxy_endpoints", {})
+
+  if !empty($service_endpoints) {
+    create_resources('tripleo::haproxy::endpoint', $service_endpoints)
+  }
+
+}

releasenotes/notes/haproxy_dynamic_endpoints-bf618ef45674bea4.yaml

@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    This change allows to dynamically create new service endpoints, either using hiera
+    in heat, or with some new service profile you can then include in the roles_data.yml
+fixes:
+  - |
+    Allow to add custom backends in HAProxy (1721832)