Bug 1768944

Summary: [QE][Docs][RFE] Document Cells V2 multi-cell
Product: Red Hat OpenStack Reporter: Irina <igallagh>
Component: documentationAssignee: Mikey Ariel <mariel>
Status: CLOSED CURRENTRELEASE QA Contact: Paras Babbar <pbabbar>
Severity: medium Docs Contact:
Priority: medium    
Version: 16.0 (Train)CC: ccopello, mariel, pbabbar
Target Milestone: gaKeywords: FutureFeature, Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: docs-accepted
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-02-18 17:08:55 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1328124, 1698539, 1698577, 1804899    
Bug Blocks: 1769458    

Description Irina 2019-11-05 15:56:38 UTC 
Document how to use the Cells V2 multiple cells feature:

* Primer on cells in Nova
* Maximum number of nodes that can be supported by multi-cell
* Limitations of multi-cell:
** Instances cannot be migrated between cells
** TLS everywhere is not supported
* Installing multi-cell:
** Deployed by director.
** Setting up the cells
** Scaling up/down with minions (how Cellsv2 affects your deployment)
* Using multi-cell:
** Create an instance in the availability zone of the cell - can you launch a VM in that cell?
** Test by creating a second VMs in another cell and ping between them.
* Admin procedures:
** Managing a cell
** Scale up down
** Adding removing computes
** Delete a cell
** Minor updates on a cell
** Disable a cell