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Bug 1343898

Summary:	Tracker: Document the fact that clusters/DCs older than 3.6 are no longer supported
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	Allon Mureinik <amureini>
Component:	Documentation	Assignee:	Tahlia Richardson <trichard>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Megan Lewis <melewis>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	4.0.0	CC:	amureini, gklein, lbopf, lsurette, rbalakri, srevivo, ykaul
Target Milestone:	ovirt-4.0.1
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-08-15 00:17:09 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Docs	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1326421, 1343903, 1343913, 1343922, 1351769, 1351772
Bug Blocks:

Description Allon Mureinik 2016-06-08 09:22:19 UTC

Description of problem:
RHEV-M 4.0 removes the support for clusters and DCs older than 3.6. This should be clearly documented, and any specific references to such cluster/DC versions should be removed from the documentation.

Version-Release number of selected component (if applicable):
4.0

Comment 1 Lucy Bopf 2016-07-13 06:22:11 UTC

Assigning to Tahlia for review.

Comment 2 Tahlia Richardson 2016-08-03 03:49:35 UTC

https://access.redhat.com/documentation/en/red-hat-virtualization/4.0-beta/paged/administration-guide/76-importing-existing-storage-domains says "You can only import existing data storage domains that were attached to data centers with a compatibility level of 3.5 or higher." 
In 4.0, should this now be 3.6 (lowest compatibility version)? Or can you only import storage domains that were in 4.0 data centers?

Comment 3 Allon Mureinik 2016-08-03 08:06:37 UTC

(In reply to Tahlia Richardson from comment #2)
> https://access.redhat.com/documentation/en/red-hat-virtualization/4.0-beta/
> paged/administration-guide/76-importing-existing-storage-domains says "You
> can only import existing data storage domains that were attached to data
> centers with a compatibility level of 3.5 or higher." 
> In 4.0, should this now be 3.6 (lowest compatibility version)? Or can you
> only import storage domains that were in 4.0 data centers?

Good question!
I'm not quite sure how to phrase this, but I'll try to supply the information and leave the translation from broken English to real English to the experts :-)

The main point of importing a data domain is taking a data domain from another RHV instance (whether it was cleanly detached or the RHV engine was lost due to a disaster) and bringing it into ("importing") another instance.
RHV 4.0 can import a domain that belonged to a DC of compatibility version 3.5 and above, regardless of the RH[E]V version that created it.

Comment 4 Tahlia Richardson 2016-08-04 01:30:26 UTC

Awesome, thanks Allon! So the existing text is still technically correct; I might tweak it a little, though, to make it clear that it's still true in RHV 4.

Comment 7 Tahlia Richardson 2016-08-15 00:17:09 UTC

Fix now published throughout guides at https://access.redhat.com/documentation/en/red-hat-virtualization?version=4.0/