[Bugs] [Bug 1240227] New: [SNAPSHOT]: fails to create on thin LV with LUKS layer in between

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1240227

            Bug ID: 1240227
           Summary: [SNAPSHOT]: fails to create on thin LV with LUKS layer
                    in between
           Product: Red Hat Gluster Storage
         Component: gluster-snapshot
          Keywords: Triaged
          Severity: high
          Priority: high
          Assignee: rjoseph at redhat.com
          Reporter: rjoseph at redhat.com
        QA Contact: storage-qa-internal at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com,
                    lmohanty at redhat.com,
                    pille+redhat+bugzilla at struction.de,
                    rhinduja at redhat.com
        Depends On: 1178031



+++ This bug was initially created as a clone of Bug #1178031 +++

Description of problem:

my bricks are on XFS on LUKS on thin-LV.
creating a shapshot fails.


Steps to Reproduce:
1. create bricks on thin-LV, but with additional LUKS encryption layer
2. gluster snapshot ...

Actual results:

snapshot create: failed: Snapshot is supported only for thin provisioned LV.
Ensure that all bricks of storage_www are thinly provisioned LV.
Snapshot command failed


Expected results:

snapshot


Additional info:

[2015-01-01 16:41:35.047033] E
[glusterd-snapshot.c:1742:glusterd_is_thinp_brick] 0-management: Failed to get
pool name for device /dev/mapper/data
[2015-01-01 16:41:35.047128] E
[glusterd-snapshot.c:2081:glusterd_snapshot_create_prevalidate] 0-management:
Snapshot is supported only for thin provisioned LV. Ensure that all bricks of
storage_www are thinly provisioned LV.
[2015-01-01 16:41:35.047139] W
[glusterd-snapshot.c:7013:glusterd_snapshot_prevalidate] 0-management: Snapshot
create pre-validation failed
[2015-01-01 16:41:35.047146] W [glusterd-mgmt.c:154:gd_mgmt_v3_pre_validate_fn]
0-management: Snapshot Prevalidate Failed
[2015-01-01 16:41:35.047151] E
[glusterd-mgmt.c:675:glusterd_mgmt_v3_pre_validate] 0-management: Pre
Validation failed for operation Snapshot on local node
[2015-01-01 16:41:35.047156] E
[glusterd-mgmt.c:1850:glusterd_mgmt_v3_initiate_snap_phases] 0-management: Pre
Validation Failed

--- Additional comment from pille on 2015-01-16 09:03:47 EST ---

hey, i'd like to know what the ETA for this issue is.
we have a tight schedule and need to figure out whether we wait for a solution
on your side, or we do the work of reconfiguring the storage, so that the
crypto layer is below the thinpool. the trade-off is that we would need to
backup the data before and migration in each direction will take two weeks.


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1178031
[Bug 1178031] [SNAPSHOT]: fails to create on thin LV with LUKS layer in
between
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