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Bug 1181316

Summary: Eqlx driver can lead to deadlock on SSH session unavailability
Product: Red Hat OpenStack Reporter: Rajini Karthik <rajini.karthik>
Component: openstack-cinderAssignee: Eric Harney <eharney>
Status: CLOSED ERRATA QA Contact: Prasanth Anbalagan <panbalag>
Severity: high Docs Contact:
Priority: high    
Version: 6.0 (Juno)CC: ajeain, arkady_kanevsky, cdevine, christopher_dearborn, eharney, hbrock, ichavero, jjarvis, joherr, John_walsh, kurt_hey, mburns, morazi, rajini.karthik, randy_perryman, rhos-maint, scohen, sgotliv, sreichar, yeylon
Target Milestone: z1Keywords: ZStream
Target Release: 6.0 (Juno)   
Hardware: x86_64   
OS: Linux   
URL: https://bugs.launchpad.net/cinder/+bug/1410627
Whiteboard:
Fixed In Version: openstack-cinder-2014.2.2-1.el7ost Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1175000 Environment:
Last Closed: 2015-03-05 18:20:59 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: 1188389    
Bug Blocks: 1171850    

Description Rajini Karthik 2015-01-12 20:51:33 UTC 
Description of problem:
Eqlx driver can lead to deadlock on SSH session unavailability

https://bugs.launchpad.net/cinder/+bug/1374613
This is a bug in the eql cinder driver and there will be a patch submitted to the cinder/openstack juno branch and the kilo/current branch



Version-Release number of selected component (if applicable):
Target to pull this for the next OSP6 update.

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

--- Additional comment from arkady kanevsky on 2014-12-16 17:56:31 EST ---

Rajini,
let you track upstream progress on it and cinder.conf changes needed for it.
If we manage to have the same Dell driver to be able to handle both CMPL and EQL then you will need to file another bug for fixing EQL config in cinder puppet module.

No change in cinder puppet till CMPL driver is merged upstream.


Mike,
I targeted it to A2. If we need to target it to A1 for meeting JS-3.5 timeline, please, modify it.
Comment 2 Rajini Karthik 2015-01-14 15:47:42 UTC 
This is the actual bug URL. The one in description is not the right one

https://bugs.launchpad.net/cinder/+bug/1410627
Comment 3 Rajini Karthik 2015-01-14 15:48:41 UTC 
Fix proposed that has to be pulled in is 
https://review.openstack.org/#/c/147070/
Comment 6 Prasanth Anbalagan 2015-02-18 17:19:58 UTC 
I do not see any deadlocks while testing with the following version,

[root@lynx13 ~(keystone_admin)]# yum list installed | grep openstack-cinder
openstack-cinder.noarch          2014.2.2-1.el7ost       @RH7-RHOS-6.0          

With eqlx_cli_timeout set to 1 second and forcing SSH timeouts, I tried several cinder commands and no deadlocks were observed. The same was tried with Tempest tests running in the background to create load on the system. Since no issues were observed under these scenarios, I'm moving the bug to verified.
Comment 8 errata-xmlrpc 2015-03-05 18:20:59 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://rhn.redhat.com/errata/RHBA-2015-0637.html