Bug 1784895 - RBD block devices remained mapped after concurrent "rbd unmap" failures
Summary: RBD block devices remained mapped after concurrent "rbd unmap" failures
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: RBD
Version: 4.0
Hardware: Unspecified
OS: Unspecified
high
urgent
Target Milestone: rc
: 4.1
Assignee: Jason Dillaman
QA Contact: Harish Munjulur
URL:
Whiteboard:
Depends On:
Blocks: 1783415 1816167
TreeView+ depends on / blocked
 
Reported: 2019-12-18 15:42 UTC by Jason Dillaman
Modified: 2020-07-09 09:53 UTC (History)
10 users (show)

Fixed In Version: ceph-14.2.8-3.el8, ceph-14.2.8-3.el7
Doc Type: Bug Fix
Doc Text:
.Multiple `rbd unmap` commands can be issued concurrently and the corresponding RBD block devices are unmapped successfully Previously, issuing concurrent `rbd unmap` commands could result in udev-related event race conditions. The commands would sporadically fail, and the corresponding RBD block devices might remain mapped to their node. With this update, the udev-related event race conditions have been fixed, and the commands no longer fail.
Clone Of:
Environment:
Last Closed: 2020-05-19 17:31:24 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Ceph Project Bug Tracker 41036 0 None None None 2019-12-18 15:45:31 UTC
Red Hat Product Errata RHSA-2020:2231 0 None None None 2020-05-19 17:31:57 UTC

Description Jason Dillaman 2019-12-18 15:42:37 UTC 
Description of problem:
Unmapping 200 images concurrently leaves behind 10-20 mappings. This is simulating an OCS workload mapping/unmapping RBD PVs on a node.

Version-Release number of selected component (if applicable):
14.2.4-69.el8cp

How reproducible:
100%

Steps to Reproduce:
1. Map hundreds of RBD images to a single node (simulate OCS PVs getting mapped to a pod)
2. Unmap the volumes concurrently

Actual results:
Several RBD block devices remained mapped

Expected results:
All RBD block devices are unmapped
Comment 2 Jason Dillaman 2020-01-07 14:02:48 UTC 
Moving to 4.0.z1 pending QE ack.
Comment 10 Harish Munjulur 2020-04-17 00:01:56 UTC 
Issue not reproducible on ceph 4.1(14.2.8-21.el8)
Comment 11 Harish Munjulur 2020-04-17 00:02:56 UTC 
QE: Verified
Comment 15 errata-xmlrpc 2020-05-19 17:31:24 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/RHSA-2020:2231
Note You need to log in before you can comment on or make changes to this bug.