Set the Primary CN
==================

This document describes the process to be followed when changing the primary
Coordinating Node.

It is important that the primary CN remain fully operational so that Member
Nodes and clients interacting with the DataONE infrastructure are minimally
impacted by maintenance and other activities that need to be performed on the
primary CN. When it becomes necessary to stop services requierd for normal CN
operation, it is necessary to switch the Primary CN to one of the alternates.


TBD. see :doc:`cn_software_upgrade`

.. contents:: Contents
   :local:
   :backlinks: entry


1. Notify Impending Outage
--------------------------

TBD

2. Determine the Current System State
-------------------------------------

TBD

3. Halt Updating Services
-------------------------

TBD

4. Switch the DNS Entry
-----------------------

TBD

5. Start Updating Services on New Primary CN
--------------------------------------------

TBD

6. Verify Correct Operation
---------------------------

TBD

7. Notify Resumption of Normal Operations
-----------------------------------------

TBD