RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1091543 - bogus error when attempting to split images from raid1 cache origin volume
Summary: bogus error when attempting to split images from raid1 cache origin volume
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: lvm2
Version: 7.0
Hardware: x86_64
OS: Linux
low
low
Target Milestone: rc
: ---
Assignee: Petr Rockai
QA Contact: Cluster QE
URL:
Whiteboard:
Depends On:
Blocks: 1119326
TreeView+ depends on / blocked
 
Reported: 2014-04-25 20:09 UTC by Corey Marthaler
Modified: 2023-03-08 07:26 UTC (History)
7 users (show)

Fixed In Version: lvm2-2.02.112-1.el7
Doc Type: Bug Fix
Doc Text:
Issuing a lvconvert --splitmirror command on a RAID volume with a persistent cache on top would have caused a confusing error message to be printed. The code has been changed to proceed by using the underlying RAID volume for this operation, since --splitmirror does not make sense for the cache LV directly.
Clone Of:
Environment:
Last Closed: 2015-03-05 13:08:24 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:0513 0 normal SHIPPED_LIVE lvm2 bug fix and enhancement update 2015-03-05 16:14:41 UTC

Description Corey Marthaler 2014-04-25 20:09:45 UTC 
Description of problem:
When attempting to split images off a raid cache origin, I got this "--cachepool argument is required" error when really, i was supposed to use the new "split_origin_corig" subvol name for the raid instead of "split_origin".

[root@harding-03 ~]# pvscan
  PV /dev/sdb3   VG split_image lvm2 [31.05 GiB / 30.55 GiB free]
  PV /dev/sdb2   VG split_image lvm2 [31.04 GiB / 30.55 GiB free]
  PV /dev/sdb1   VG split_image lvm2 [31.05 GiB / 30.56 GiB free]
  PV /dev/sdc3   VG split_image lvm2 [31.05 GiB / 30.55 GiB free]
  PV /dev/sdc2   VG split_image lvm2 [31.04 GiB / 30.55 GiB free]
  PV /dev/sdc1   VG split_image lvm2 [31.05 GiB / 30.56 GiB free]

[root@harding-03 ~]# lvs -a -o +devices
  LV                      Attr       LSize   Pool  Origin               Cpy%Sync Devices
  cache                   Cwi-a-C--- 500.00m                                     cache_cdata(0)
  [cache_cdata]           Cwi-aoC--- 500.00m                                     /dev/sdc3(0)
  [cache_cmeta]           ewi-aoC---   8.00m                                     /dev/sdc3(125)
  [lvol0_pmspare]         ewi-------   8.00m                                     /dev/sdb3(126)
  split_origin            Cwi-a-C--- 500.00m cache [split_origin_corig]          split_origin_corig(0)
  [split_origin_corig]    rwi-aor--- 500.00m                              100.00 split_origin_rimage_0(0),split_origin_rimage_1(0),split_origin_rimage_2(0),split_origin_rimage_3(0),split_origin_rimage_4(0)
  [split_origin_rimage_0] iwi-aor--- 500.00m                                     /dev/sdc2(1)
  [split_origin_rimage_1] iwi-aor--- 500.00m                                     /dev/sdc1(1)
  [split_origin_rimage_2] iwi-aor--- 500.00m                                     /dev/sdb1(1)
  [split_origin_rimage_3] iwi-aor--- 500.00m                                     /dev/sdb3(1)
  [split_origin_rimage_4] iwi-aor--- 500.00m                                     /dev/sdb2(1)
  [split_origin_rmeta_0]  ewi-aor---   4.00m                                     /dev/sdc2(0)
  [split_origin_rmeta_1]  ewi-aor---   4.00m                                     /dev/sdc1(0)
  [split_origin_rmeta_2]  ewi-aor---   4.00m                                     /dev/sdb1(0)
  [split_origin_rmeta_3]  ewi-aor---   4.00m                                     /dev/sdb3(0)
  [split_origin_rmeta_4]  ewi-aor---   4.00m                                     /dev/sdb2(0)

[root@harding-03 ~]# lvconvert --splitmirrors 1 --name new0 split_image/split_origin /dev/sdb1
  --cachepool argument is required.

[root@harding-03 ~]# lvconvert --splitmirrors 1 --cachepool cache --name new0 split_image/split_origin /dev/sdb1
  --cachepool argument is only valid with  the "cache" segment type
  Run `lvconvert --help' for more information.

[root@harding-03 ~]# lvconvert --splitmirrors 1 --cachepool --name new0 split_image/split_origin /dev/sdb1
  --cachepool argument is only valid with  the "cache" segment type
  Run `lvconvert --help' for more information.

[root@harding-03 ~]# lvconvert --splitmirrors 1 --name new0 split_image/split_origin_corig /dev/sdb1

[root@harding-03 ~]# lvs -a -o +devices
  LV                      Attr       LSize   Pool  Origin               Cpy%Sync Devices
  cache                   Cwi-a-C--- 500.00m                                     cache_cdata(0)
  [cache_cdata]           Cwi-aoC--- 500.00m                                     /dev/sdc3(0)
  [cache_cmeta]           ewi-aoC---   8.00m                                     /dev/sdc3(125)
  [lvol0_pmspare]         ewi-------   8.00m                                     /dev/sdb3(126)
  new0                    -wi-a----- 500.00m                                     /dev/sdb1(1)
  split_origin            Cwi-a-C--- 500.00m cache [split_origin_corig]          split_origin_corig(0)
  [split_origin_corig]    rwi-aor--- 500.00m                              100.00 split_origin_rimage_0(0),split_origin_rimage_1(0),split_origin_rimage_2(0),split_origin_rimage_3(0)
  [split_origin_rimage_0] iwi-aor--- 500.00m                                     /dev/sdc2(1)
  [split_origin_rimage_1] iwi-aor--- 500.00m                                     /dev/sdc1(1)
  [split_origin_rimage_2] iwi-aor--- 500.00m                                     /dev/sdb3(1)
  [split_origin_rimage_3] iwi-aor--- 500.00m                                     /dev/sdb2(1)
  [split_origin_rmeta_0]  ewi-aor---   4.00m                                     /dev/sdc2(0)
  [split_origin_rmeta_1]  ewi-aor---   4.00m                                     /dev/sdc1(0)
  [split_origin_rmeta_2]  ewi-aor---   4.00m                                     /dev/sdb3(0)
  [split_origin_rmeta_3]  ewi-aor---   4.00m                                     /dev/sdb2(0)


Version-Release number of selected component (if applicable):
3.10.0-110.el7.x86_64
lvm2-2.02.105-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
lvm2-libs-2.02.105-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
lvm2-cluster-2.02.105-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
device-mapper-1.02.84-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
device-mapper-libs-1.02.84-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
device-mapper-event-1.02.84-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
device-mapper-event-libs-1.02.84-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014
device-mapper-persistent-data-0.2.8-4.el7    BUILT: Fri Jan 24 14:28:55 CST 2014
cmirror-2.02.105-14.el7    BUILT: Wed Mar 26 08:29:41 CDT 2014


How reproducible:
Everytime
Comment 1 Jonathan Earl Brassow 2014-09-30 15:01:34 UTC 
Upstream code still yields strange message:

[root@bp-01 ~]# lvconvert --splitmirrors 1 --name new0 vg/lv
  Mirrors are not yet supported on cache LVs vg/lv.
Comment 2 Petr Rockai 2014-10-06 06:15:55 UTC 
The problem was that the code picked an old-style-mirror based path because of splitmirror and the LV not being a RAID LV, giving the confusing error. I have changed lvconvert (in d2f901f04f76cca110475395272e70c83bea816d) to warn the user about using --splitmirrors over a cache LV and to proceed using the origin for the operation.
Comment 4 Corey Marthaler 2014-12-04 23:35:47 UTC 
Verification of this is blocked behind bug 1164347.
Comment 5 Corey Marthaler 2015-01-28 21:02:15 UTC 
Fix verified in the latest rpms. The cmd now just "does the right thing".


[root@host-116 ~]# lvconvert --splitmirrors 1 --name new3 split_image/split_origin
  WARNING: Selected operation does not work with cache-type LVs.
  Proceeding using the cache origin LV split_origin_corig instead



3.10.0-225.el7.x86_64
lvm2-2.02.115-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
lvm2-libs-2.02.115-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
lvm2-cluster-2.02.115-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
device-mapper-1.02.93-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
device-mapper-libs-1.02.93-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
device-mapper-event-1.02.93-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
device-mapper-event-libs-1.02.93-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
device-mapper-persistent-data-0.4.1-2.el7    BUILT: Wed Nov 12 12:39:46 CST 2014
cmirror-2.02.115-3.el7    BUILT: Wed Jan 28 09:59:01 CST 2015
Comment 7 errata-xmlrpc 2015-03-05 13:08:24 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://rhn.redhat.com/errata/RHBA-2015-0513.html
Note You need to log in before you can comment on or make changes to this bug.