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Bug 1143747 - attempting to set a persistent minor number on an exclusively activated thin volume causes locking/activation issues
Summary: attempting to set a persistent minor number on an exclusively activated thin ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: lvm2
Version: 6.6
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Zdenek Kabelac
QA Contact: cluster-qe@redhat.com
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-09-17 21:22 UTC by Corey Marthaler
Modified: 2015-07-22 07:35 UTC (History)
7 users (show)

Fixed In Version: lvm2-2.02.118-1.el6
Doc Type: Bug Fix
Doc Text:
lvm2 tool used to accept options to set major:minor values for thin-pool volumes in some command variant. However such settings were later actually ignored. The fix has removed possibility to set major:minor for internal abstract volumes (which thin-pool actually is). Tool now correctly reports unsupported error message.
Clone Of:
Environment:
Last Closed: 2015-07-22 07:35:34 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
-vvvv of the lvchange (90.68 KB, text/plain)
2014-09-17 21:36 UTC, Corey Marthaler 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:1411 0 normal SHIPPED_LIVE lvm2 bug fix and enhancement update 2015-07-20 18:06:52 UTC

Description Corey Marthaler 2014-09-17 21:22:28 UTC 
Description of problem:
[root@grant-01 ~]# vgcreate VG /dev/mapper/mpath[abcdefgh]p*
  Clustered volume group "VG" successfully created

[root@grant-01 ~]# lvcreate --activate ey --thinpool pool -L 1G VG
  Logical volume "lvol0" created
  Logical volume "pool" created

[root@grant-01 ~]# lvs -a -o +devices
  LV              VG  Attr       LSize  Pool Data% Meta% Devices
  [lvol0_pmspare] VG  ewi-------  4.00m                  /dev/mapper/mpathap1(0)
  pool            VG  twi-a-tz--  1.00g      0.00  0.98  pool_tdata(0)
  [pool_tdata]    VG  Twi-ao----  1.00g                  /dev/mapper/mpathap1(1)
  [pool_tmeta]    VG  ewi-ao----  4.00m                  /dev/mapper/mpathhp2(0)
[root@grant-02 ~]# lvs -a -o +devices
  LV              VG  Attr       LSize  Pool Data% Meta% Devices                
  [lvol0_pmspare] VG  ewi-------  4.00m                  /dev/mapper/mpathap1(0)
  pool            VG  twi---tz--  1.00g                  pool_tdata(0)
  [pool_tdata]    VG  Twi-------  1.00g                  /dev/mapper/mpathap1(1)
  [pool_tmeta]    VG  ewi-------  4.00m                  /dev/mapper/mpathfp2(0)
[root@grant-03 ~]# lvs -a -o +devices
  LV              VG  Attr       LSize  Pool Data% Meta% Devices                
  [lvol0_pmspare] VG  ewi-------  4.00m                  /dev/mapper/mpathhp1(0)
  pool            VG  twi---tz--  1.00g                  pool_tdata(0)
  [pool_tdata]    VG  Twi-------  1.00g                  /dev/mapper/mpathhp1(1)
  [pool_tmeta]    VG  ewi-------  4.00m                  /dev/mapper/mpathcp2(0)

# The following command works if the VG or LV is deactivated before this, however if it's not...

[root@grant-01 ~]# lvchange -aye -f -My --major 255 --minor 159 /dev/VG/pool
  Logical volume "pool" changed.
  Error locking on node grant-01: Device or resource busy

# Now the volume is "active" on all nodes in the cluster:

[root@grant-01 ~]# lvs -a -o +devices
  LV              VG  Attr       LSize  Pool Data% Meta% Devices                
  [lvol0_pmspare] VG  ewi-------  4.00m                  /dev/mapper/mpathap1(0)
  pool            VG  twima-tz--  1.00g      0.00  0.98  pool_tdata(0)
  [pool_tdata]    VG  Twi-ao----  1.00g                  /dev/mapper/mpathap1(1)
  [pool_tmeta]    VG  ewi-ao----  4.00m                  /dev/mapper/mpathhp2(0)
[root@grant-02 ~]# lvs -a -o +devices
  LV              VG  Attr       LSize  Pool Data% Meta% Devices                
  [lvol0_pmspare] VG  ewi-------  4.00m                  /dev/mapper/mpathap1(0)
  pool            VG  twima-tz--  1.00g      0.00  0.98  pool_tdata(0)
  [pool_tdata]    VG  Twi-ao----  1.00g                  /dev/mapper/mpathap1(1)
  [pool_tmeta]    VG  ewi-ao----  4.00m                  /dev/mapper/mpathfp2(0)
[root@grant-03 ~]# lvs -a -o +devices
  LV              VG  Attr       LSize  Pool Data% Meta% Devices                
  [lvol0_pmspare] VG  ewi-------  4.00m                  /dev/mapper/mpathhp1(0)
  pool            VG  twima-tz--  1.00g      0.00  0.98  pool_tdata(0)
  [pool_tdata]    VG  Twi-ao----  1.00g                  /dev/mapper/mpathhp1(1)
  [pool_tmeta]    VG  ewi-ao----  4.00m                  /dev/mapper/mpathcp2(0)


Version-Release number of selected component (if applicable):
2.6.32-502.el6.x86_64
lvm2-2.02.111-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
lvm2-libs-2.02.111-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
lvm2-cluster-2.02.111-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
udev-147-2.57.el6    BUILT: Thu Jul 24 08:48:47 CDT 2014
device-mapper-1.02.90-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
device-mapper-libs-1.02.90-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
device-mapper-event-1.02.90-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
device-mapper-event-libs-1.02.90-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014
device-mapper-persistent-data-0.3.2-1.el6    BUILT: Fri Apr  4 08:43:06 CDT 2014
cmirror-2.02.111-2.el6    BUILT: Mon Sep  1 06:46:43 CDT 2014


How reproducible:
Everytime
Comment 1 Corey Marthaler 2014-09-17 21:36:26 UTC 
Created attachment 938646 [details]
-vvvv of the lvchange
Comment 3 Zdenek Kabelac 2014-11-26 20:12:06 UTC 
Here we need to consider more things now with docker support to use 'initialized' but unused thin-pool.

ATM (with version 2.02.112) it's been disabled to create thin-pool with --minor - however now when we allowed 'public' use for thin-pool - we may need to consider to again enable support.

lvchange remained so far unchanged.
Comment 4 Zdenek Kabelac 2015-03-04 12:21:14 UTC 
The fix here will disable support for  lvchange of --minor for thin-pool.

Minor support was purely oriented to support 'nfs' use-case where filesystem has to be located on a fixed minor device.

There is no use case of fixed minor  for thin-pool device.
Comment 5 Zdenek Kabelac 2015-03-18 13:11:32 UTC 
lvchange of persistent majors/minors for pool volumes has been disabled with upstream commit:

https://www.redhat.com/archives/lvm-devel/2015-March/msg00075.html
Comment 7 Corey Marthaler 2015-05-01 20:15:30 UTC 
Marking "verified" in the latest rpms. The changing of minor numbers is no longer allowed with pool volumes (on clustered vgs or not).

lvm2-2.02.118-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
lvm2-libs-2.02.118-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
lvm2-cluster-2.02.118-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
udev-147-2.61.el6    BUILT: Mon Mar  2 05:08:11 CST 2015
device-mapper-1.02.95-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
device-mapper-libs-1.02.95-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
device-mapper-event-1.02.95-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
device-mapper-event-libs-1.02.95-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015
device-mapper-persistent-data-0.3.2-1.el6    BUILT: Fri Apr  4 08:43:06 CDT 2014
cmirror-2.02.118-2.el6    BUILT: Wed Apr 15 06:34:08 CDT 2015


[root@host-082 ~]# lvchange -f -My --major 255 --minor 159 /dev/VG/pool
  Persistent major and minor numbers are not supported with pools.
Comment 8 errata-xmlrpc 2015-07-22 07:35:34 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-2015-1411.html
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