Bug 1428662

Summary:	Fix iSCSI multipath rescan issue. Upstream https://review.openstack.org/#/c/433104
Product:	Red Hat OpenStack	Reporter:	VIKRANT <vaggarwa>
Component:	openstack-cinder	Assignee:	Gorka Eguileor <geguileo>
Status:	CLOSED ERRATA	QA Contact:	Avi Avraham <aavraham>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	10.0 (Newton)	CC:	arkady_kanevsky, ccollett, eharney, geguileo, John_walsh, kurt_hey, mnadeem, pgrist, rajini.karthik, skinjo, srevivo, tshefi, vaggarwa
Target Milestone:	z5	Keywords:	Triaged, ZStream
Target Release:	10.0 (Newton)
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	openstack-cinder-9.1.4-7.el7ost	Doc Type:	Bug Fix
Doc Text:	This update improves iSCSI connections by using the latest os-brick functionality to force detach volumes when appropriate. For optimum results, use with iscsi-initiator-utils version 6.2.0.874-2 or greater.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-09-28 16:31:38 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:	1441066
Bug Blocks:

Description VIKRANT 2017-03-03 04:45:58 UTC

Description of problem:

Fix iSCSI multipath rescan issue. Cu. is hitting the issue mentioned in upstream Bug https://review.openstack.org/#/c/433104

Version-Release number of selected component (if applicable):
RHEL OSP 10

How reproducible:
Checking with Cu. 

Steps to Reproduce:
1.
2.
3.

Actual results:

Cinder volume is getting stuck in Detaching state. Here is the multipath output from compute node for stuck cinder volume.

~~~
cat sos_commands/multipath/multipath_-l
3600601609e603d00d80340268cffe611 dm-0 ,
size=1.0G features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=0 status=enabled
  `- #:#:#:# - #:# failed undef running
~~~

Expected results:

Cinder volume should get detached successfully. 

Additional info:

Nothing atm.

Comment 10 Paul Grist 2017-03-30 01:08:32 UTC

In further testing last week, some key additional fixes were identified for this collection and Gorka is the process of getting those ready to post upstream. We don't have a specific ETA, but we will get the BZs updated once the patches are ready.

Comment 11 Paul Grist 2017-04-12 03:26:53 UTC

Patches are posted for review, comprehensive testing is now passing on iSCSI (FC mpath testing will follow). 

The relevant patch set will actually be the following set and we will confirm the proper collection needed which may actually vary from the initial set proposed.  This BZ will be the right place to track status for the collection.

https://review.openstack.org/#/c/455394/
https://review.openstack.org/#/c/455393/
https://review.openstack.org/#/c/455392/

Comment 22 Eric Harney 2017-09-12 18:12:15 UTC

*** Bug 1455738 has been marked as a duplicate of this bug. ***

Comment 24 Tzach Shefi 2017-09-28 11:10:12 UTC

Verified on 
openstack-cinder-9.1.4-9.el7ost.noarch

On a previous bug tested on same system I had booted 18 instance created vol from image, shutdown=preserve. 

All 18 instance+volumes were created, later I deleted all 18 instances, which in turn left 18 available volumes. 

This was repeated four times, total of 72 instances volumes were created detached deleted, no error was hit, no volumes failed to detach. 

logs on controller and compute don't report use of:
iscsiadm --rescan

Comment 25 errata-xmlrpc 2017-09-28 16:31:38 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-2017:2821