.. Licensed to the Apache Software Foundation (ASF) under one
   or more contributor license agreements.  See the NOTICE file
   distributed with this work for additional information#
   regarding copyright ownership.  The ASF licenses this file
   to you 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.

.. sub-section included in upgrade notes.

If you run into any issues during upgrades, please feel free to ask
questions on users@cloudstack.apache.org or dev@cloudstack.apache.org.

.. warning:: 
   Depreciation of realhostip.com DNS and SSL certificate
   
   The realhostip.com dynamic DNS resolution service is being retired this
   summer. In advance of that, CloudStack 4.3 and later no longer uses 
   realhostip.com DNS domains or SSL certificates to encrypt Console Proxy or 
   file copy communications.

Any steps that are hypervisor-specific will be called out with a note.

We recommend reading through this section once or twice before beginning
your upgrade procedure, and working through it on a test system before
working on a production system.

.. note:: 
   The following upgrade instructions should be performed regardless of 
   hypervisor type.