Refactor HAproxy and VIP creation.

In tripleo heat template, overcloud_controller_pacemaker.pp has a lot of
duplicate code to define haproxy and vip creation.  This is an attempt
to refactor this.

Change-Id: I4cc6711911c1bfa1bc6063979e2b2a7ab5b8d37b

manifests/pacemaker/haproxy_with_vip.pp

@@ -0,0 +1,64 @@
+# Copyright 2016 Red Hat, Inc.
+# All Rights Reserved.
+#
+# 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::pacemaker::haproxy_with_vip
+#
+# Configure the vip with the haproxy under pacemaker
+#
+# === Parameters:
+#
+# [*vip_name*]
+#  (String) Logical name of the vip (control, public, storage ...)
+#  Required
+#
+# [*ip_address*]
+#  (String) IP address on which HAProxy is colocated
+#  Required
+#
+# [*ensure*]
+#  (Boolean) Create the all the resources only if true.  False won't
+#  destroy the resource, it will just not create them.
+#  Default to true
+define tripleo::pacemaker::haproxy_with_vip($vip_name, $ip_address, $ensure = true) {
+  if($ensure) {
+    if is_ipv6_address($ip_address) {
+      $netmask = '64'
+    } else {
+      $netmask = '32'
+    }
+
+    pacemaker::resource::ip { "${vip_name}_vip":
+      ip_address   => $ip_address,
+      cidr_netmask => $netmask,
+    }
+    pacemaker::constraint::base { "${vip_name}_vip-then-haproxy":
+      constraint_type   => 'order',
+      first_resource    => "ip-${ip_address}",
+      second_resource   => 'haproxy-clone',
+      first_action      => 'start',
+      second_action     => 'start',
+      constraint_params => 'kind=Optional',
+      require           => [Pacemaker::Resource::Service['haproxy'],
+                            Pacemaker::Resource::Ip["${vip_name}_vip"]],
+    }
+    pacemaker::constraint::colocation { "${vip_name}_vip-with-haproxy":
+      source  => "ip-${ip_address}",
+      target  => 'haproxy-clone',
+      score   => 'INFINITY',
+      require => [Pacemaker::Resource::Service['haproxy'],
+                  Pacemaker::Resource::Ip["${vip_name}_vip"]],
+    }
+  }
+}