Update cells doc for the 18.11 release

Change-Id: Id48c8c59b0e62d285474569e8c4a269afb2e9bae
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Ryan Beisner 2018-11-14 14:03:46 +01:00
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@ -4,11 +4,15 @@ Appendix G: Additional Nova Cells
Overview
++++++++
Since Pike all OpenStack charm deployments have two cells: cell0 which is
used to store instances which failed to get scheduled and cell1 which is an
active compute cell. As of the 18.11 charm release multiple nova cells can be
created when deploying a cloud or an existing deployment can be extended to
add additional cells.
As of the 18.11 charm release, with OpenStack Rocky and later, multiple nova
cells can be created when deploying a cloud or an existing deployment can be
extended to add additional cells.
Prior to Rocky, and since Pike, all OpenStack charm deployments have two
cells: cell0 which is used to store instances which failed to get scheduled
and cell1 which is an active compute cell. Additional cells are not supported
by the charms prior to Rocky.
Nova Cells v2 Topology
++++++++++++++++++++++