Bug 1182369

Summary:	[RFE][HC] - glusterfs volume create/extend should fail when bricks from the same server
Product:	[oVirt] ovirt-engine	Reporter:	Paul Cuzner <pcuzner>
Component:	RFEs	Assignee:	Sahina Bose <sabose>
Status:	CLOSED CURRENTRELEASE	QA Contact:	SATHEESARAN <sasundar>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	---	CC:	amureini, bmcclain, bugs, eheftman, g.devel, gklein, laravot, lsurette, mgoldboi, rbalakri, sabose, srevivo, ykaul
Target Milestone:	ovirt-4.1.0-beta	Keywords:	FutureFeature
Target Release:	4.1.0.2	Flags:	rule-engine: ovirt-4.1+ bmcclain: planning_ack+ sabose: devel_ack+ sasundar: testing_ack+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:	Previously in a hyper-converged cluster environment containing gluster and virt nodes, it was possible to create a replica set containing bricks from the same server. A warning appeared but the action was enabled even though there was a risk of losing data or service. In this release, it will no longer be possible to create a replica set containing multiple bricks from the same server in a hyper-converged environment.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-02-15 15:07:05 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Gluster	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1177771, 1277939

Description Paul Cuzner 2015-01-15 00:26:39 UTC

Description of problem:
Although the UI warns when creating a replica set containing bricks from the same server - it should actually fail the request when the nodes are gluster and virt i.e. hyper-converged,


Version-Release number of selected component (if applicable):
3.5

How reproducible:
n/a

Steps to Reproduce:
1. create a replicated volume by providing all bricks from the same node
2. UI provides a warning (Replicate Confirmation dialog) which the user can ignore
3.

Actual results:
Volume can be created

Expected results:
Volume made from multiple bricks from the same server in a converged use case represents a data loss or service loss risk. The UI should enforce sensible decisions to safeguard service availability.

Additional info:

Comment 1 Red Hat Bugzilla Rules Engine 2015-10-19 11:01:50 UTC

Target release should be placed once a package build is known to fix a issue. Since this bug is not modified, the target version has been reset. Please use target milestone to plan a fix for a oVirt release.

Comment 2 Sahina Bose 2016-03-31 14:38:40 UTC

Bricks from same server in a replica set should be blocked

Comment 3 Sandro Bonazzola 2016-05-02 10:10:26 UTC

Moving from 4.0 alpha to 4.0 beta since 4.0 alpha has been already released and bug is not ON_QA.

Comment 4 Yaniv Lavi 2016-05-23 13:26:24 UTC

oVirt 4.0 beta has been released, moving to RC milestone.

Comment 5 Yaniv Lavi 2016-05-23 13:26:46 UTC

oVirt 4.0 beta has been released, moving to RC milestone.

Comment 6 Emma Heftman 2017-01-22 09:55:43 UTC

Hi Sahina
Can you please confirm whether this chapter of the Administration Guide will need to be updated to support this new behaviour:  https://access.redhat.com/documentation/en/red-hat-virtualization/4.0/single/administration-guide/#sect-Cluster_Utilization

If not, should it be documented anywhere else?

Comment 7 Sahina Bose 2017-01-23 06:59:22 UTC

Doc-text looks good to me. 
The "Global Inventory" needs to be updated, but as part of Bug 1364999

Comment 8 SATHEESARAN 2017-02-08 17:42:37 UTC

Tested with RHV 4.1 Beta ( Red Hat Virtualization Manager Version: 4.1.0.3-0.1.el7 )

When trying to create a gluster replica 3 volume with bricks on the same server, the operation failed with following error message:

"Error while executing action: Cannot create Gluster Volume. Replica set contains bricks from same server. This is not supported for hyper-converged cluster."

Comment 9 George Joseph 2017-02-09 01:35:53 UTC

So in a cluster with 4 nodes, the only way to create a replica 3/arbiter 1 volume is with 12 bricks, 3 on each node.  Is this now going to be impossible?