Bug 1721117

Summary:	[v2v] [VDDK][RHV][OSP] Concurrently migrating VMs are not correctly balanced among conversion hosts
Product:	Red Hat CloudForms Management Engine	Reporter:	Satoe Imaishi <simaishi>
Component:	V2V	Assignee:	Daniel Berger <dberger>
Status:	CLOSED ERRATA	QA Contact:	Ilanit Stein <istein>
Severity:	high	Docs Contact:	Red Hat CloudForms Documentation <cloudforms-docs>
Priority:	high
Version:	5.10.5	CC:	apinnick, bthurber, dagur, dmetzger, roliveri, ytale
Target Milestone:	GA	Keywords:	Regression, ZStream
Target Release:	5.10.6
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	5.10.6.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1716283	Environment:
Last Closed:	2019-07-02 04:33:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	V2V	Target Upstream Version:
Embargoed:
Bug Depends On:	1716283
Bug Blocks:

Comment 3 CFME Bot 2019-06-17 11:55:43 UTC

New commit detected on ManageIQ/manageiq/hammer:

https://github.com/ManageIQ/manageiq/commit/59e5de4f03c21eaaa584ef5a2ab933bd4ab4a8c5
commit 59e5de4f03c21eaaa584ef5a2ab933bd4ab4a8c5
Author:     Keenan Brock <keenan>
AuthorDate: Fri Jun 14 18:03:37 2019 -0400
Commit:     Keenan Brock <keenan>
CommitDate: Fri Jun 14 18:03:37 2019 -0400

    Merge pull request #18860 from djberg96/conversion_host_throttling

    [V2V] Modify active_tasks so that it always reloads

    (cherry picked from commit 660387c242a7581405ad85280370cd77317aac36)

    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1721117
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1721118

 app/models/conversion_host.rb | 5 +-
 lib/infra_conversion_throttler.rb | 13 +-
 2 files changed, 15 insertions(+), 3 deletions(-)

Comment 4 Ilanit Stein 2019-06-26 10:45:41 UTC

Verified on CFME-5.10.6.1/RHV-4.3.4.3-0.1.el7

Checked with 2 cases:
1. 
VMware->RHV migration, VDDK, of 20 VMs/100GB disk, and Provider max concurrent VM migrations: 20, and Max concurrent VM migrations, 2 conversion hosts, per conversion host: 10.
Storage type: VMware- ISCSI, RHV- FC.

VMs were distributed evenly, between the 2 conversion hosts, 10:10.

2.
Same env, but with 2 conversion hosts, per conversion host: 5.
result:
On first round, the VMs were distributed evenly, 5:5.
then 1 vM failed on Bug 1719689 - [v2v][RHV][vddk] 1 out of 10 VMs failed migration, on CFME failed to read the state file. 
As a result 1 additional VM started to be migrated to the conversion host, on which the first VM failed migration.
So the distribution became 5:5, again.
After the first round ended, the second round distribution was 4:5
This is even distribution, since only 9 VMs were left to migrate.
the second round ended with a second VM migration failure, on Bug 1724040 - [v2v][Scale][RHV] VM migration fail on "start is not permitted at state running"

Comment 6 errata-xmlrpc 2019-07-02 04:33:28 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:1644