thr3ads.net - Gluster users - [Gluster-users] [Possibile SPAM] Re: Problem with Gluster 3.12.4, VM and sharding [Jan 2018]

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Ing. Luca Lazzeroni - Trend Servizi Srl

2018-Jan-16 16:39 UTC

[Gluster-users] [Possibile SPAM] Re: Problem with Gluster 3.12.4, VM and sharding

An update:

I've tried, for my tests, to create the vm volume as

qemu-img create -f qcow2 -o preallocation=full 
gluster://gluster1/Test/Test-vda.img 20G

et voila !

No errors at all, neither in bricks' log file (the "link failed"
message
disappeared), neither in VM (no corruption and installed succesfully).

I'll do another test with a fully preallocated raw image.



Il 16/01/2018 16:31, Ing. Luca Lazzeroni - Trend Servizi Srl ha
scritto:>
> I've just done all the steps to reproduce the problem.
>
> Tha VM volume has been created via "qemu-img create -f qcow2 
> Test-vda2.qcow2 20G" on the gluster volume mounted via FUSE. I've 
> tried also to create the volume with preallocated metadata, which 
> moves the problem a bit far away (in time). The volume is a replice 3 
> arbiter 1 volume hosted on XFS bricks.
>
> Here are the informations:
>
> [root at ovh-ov1 bricks]# gluster volume info gv2a2
>
> Volume Name: gv2a2
> Type: Replicate
> Volume ID: 83c84774-2068-4bfc-b0b9-3e6b93705b9f
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 1 x (2 + 1) = 3
> Transport-type: tcp
> Bricks:
> Brick1: gluster1:/bricks/brick2/gv2a2
> Brick2: gluster3:/bricks/brick3/gv2a2
> Brick3: gluster2:/bricks/arbiter_brick_gv2a2/gv2a2 (arbiter)
> Options Reconfigured:
> storage.owner-gid: 107
> storage.owner-uid: 107
> user.cifs: off
> features.shard: on
> cluster.shd-wait-qlength: 10000
> cluster.shd-max-threads: 8
> cluster.locking-scheme: granular
> cluster.data-self-heal-algorithm: full
> cluster.server-quorum-type: server
> cluster.quorum-type: auto
> cluster.eager-lock: enable
> network.remote-dio: enable
> performance.low-prio-threads: 32
> performance.io-cache: off
> performance.read-ahead: off
> performance.quick-read: off
> transport.address-family: inet
> nfs.disable: off
> performance.client-io-threads: off
>
> /var/log/glusterfs/glusterd.log:
>
> [2018-01-15 14:17:50.196228] I [MSGID: 106488] 
> [glusterd-handler.c:1548:__glusterd_handle_cli_get_volume] 
> 0-management: Received get vol req
> [2018-01-15 14:25:09.555214] I [MSGID: 106488] 
> [glusterd-handler.c:1548:__glusterd_handle_cli_get_volume] 
> 0-management: Received get vol req
>
> (empty because today it's 2018-01-16)
>
> /var/log/glusterfs/glustershd.log:
>
> [2018-01-14 02:23:02.731245] I 
> [glusterfsd-mgmt.c:1821:mgmt_getspec_cbk] 0-glusterfs: No change in 
> volfile,continuing
>
> (empty too)
>
> /var/log/glusterfs/bricks/brick-brick2-gv2a2.log (the interested volume):
>
> [2018-01-16 15:14:37.809965] I [MSGID: 115029] 
> [server-handshake.c:793:server_setvolume] 0-gv2a2-server: accepted 
> client from 
> ovh-ov1-10302-2018/01/16-15:14:37:790306-gv2a2-client-0-0-0 (version: 
> 3.12.4)
> [2018-01-16 15:16:41.471751] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.4 failed
> [2018-01-16 15:16:41.471745] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.4 -> 
>
/bricks/brick2/gv2a2/.glusterfs/a0/14/a0144df3-8d89-4aed-872e-5fef141e9e1efailed
> [File exists]
> [2018-01-16 15:16:42.593392] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.5 -> 
>
/bricks/brick2/gv2a2/.glusterfs/eb/04/eb044e6e-3a23-40a4-9ce1-f13af148eb67failed
> [File exists]
> [2018-01-16 15:16:42.593426] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.5 failed
> [2018-01-16 15:17:04.129593] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.8 -> 
>
/bricks/brick2/gv2a2/.glusterfs/dc/92/dc92bd0a-0d46-4826-a4c9-d073a924dd8dfailed
> [File exists]
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.8 -> 
>
/bricks/brick2/gv2a2/.glusterfs/dc/92/dc92bd0a-0d46-4826-a4c9-d073a924dd8dfailed
> [File exists]" repeated 5 times between [2018-01-16 15:17:04.129593] 
> and [2018-01-16 15:17:04.129593]
> [2018-01-16 15:17:04.129661] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.8 failed
> [2018-01-16 15:17:08.279162] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9 -> 
>
/bricks/brick2/gv2a2/.glusterfs/c9/b7/c9b71b00-a09f-4df1-b874-041820ca8241failed
> [File exists]
> [2018-01-16 15:17:08.279162] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9 -> 
>
/bricks/brick2/gv2a2/.glusterfs/c9/b7/c9b71b00-a09f-4df1-b874-041820ca8241failed
> [File exists]
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9 -> 
>
/bricks/brick2/gv2a2/.glusterfs/c9/b7/c9b71b00-a09f-4df1-b874-041820ca8241failed
> [File exists]" repeated 2 times between [2018-01-16 15:17:08.279162] 
> and [2018-01-16 15:17:08.279162]
>
> [2018-01-16 15:17:08.279177] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9 failed
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.4 -> 
>
/bricks/brick2/gv2a2/.glusterfs/a0/14/a0144df3-8d89-4aed-872e-5fef141e9e1efailed
> [File exists]" repeated 6 times between [2018-01-16 15:16:41.471745] 
> and [2018-01-16 15:16:41.471807]
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.5 -> 
>
/bricks/brick2/gv2a2/.glusterfs/eb/04/eb044e6e-3a23-40a4-9ce1-f13af148eb67failed
> [File exists]" repeated 2 times between [2018-01-16 15:16:42.593392] 
> and [2018-01-16 15:16:42.593430]
> [2018-01-16 15:17:32.229689] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.14 -> 
>
/bricks/brick2/gv2a2/.glusterfs/53/04/530449fa-d698-4928-a262-9a0234232323failed
> [File exists]
> [2018-01-16 15:17:32.229720] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.14 failed
> [2018-01-16 15:18:07.154330] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.17 -> 
>
/bricks/brick2/gv2a2/.glusterfs/81/96/8196dd19-84bc-4c3d-909f-8792e9b4929dfailed
> [File exists]
> [2018-01-16 15:18:07.154375] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.17 failed
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.14 -> 
>
/bricks/brick2/gv2a2/.glusterfs/53/04/530449fa-d698-4928-a262-9a0234232323failed
> [File exists]" repeated 7 times between [2018-01-16 15:17:32.229689] 
> and [2018-01-16 15:17:32.229806]
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.17 -> 
>
/bricks/brick2/gv2a2/.glusterfs/81/96/8196dd19-84bc-4c3d-909f-8792e9b4929dfailed
> [File exists]" repeated 3 times between [2018-01-16 15:18:07.154330] 
> and [2018-01-16 15:18:07.154357]
> [2018-01-16 15:19:23.618794] W [MSGID: 113096] 
> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.21 -> 
>
/bricks/brick2/gv2a2/.glusterfs/6d/02/6d02bd98-83de-43e8-a7af-b1d5f5160403failed
> [File exists]
> [2018-01-16 15:19:23.618827] E [MSGID: 113020] 
> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.21 failed
> The message "W [MSGID: 113096] [posix-handle.c:770:posix_handle_hard] 
> 0-gv2a2-posix: link 
> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.21 -> 
>
/bricks/brick2/gv2a2/.glusterfs/6d/02/6d02bd98-83de-43e8-a7af-b1d5f5160403failed
> [File exists]" repeated 3 times between [2018-01-16 15:19:23.618794] 
> and [2018-01-16 15:19:23.618794]
>
> Thank you,
>
>
> Il 16/01/2018 11:40, Krutika Dhananjay ha scritto:
>> Also to help isolate the component, could you answer these:
>>
>> 1. on a different volume with shard not enabled, do you see this issue?
>> 2. on a plain 3-way replicated volume (no arbiter), do you see this 
>> issue?
>>
>>
>>
>> On Tue, Jan 16, 2018 at 4:03 PM, Krutika Dhananjay 
>> <kdhananj at redhat.com <mailto:kdhananj at redhat.com>>
wrote:
>>
>>     Please share the volume-info output and the logs under
>>     /var/log/glusterfs/ from all your nodes. for investigating the
issue.
>>
>>     -Krutika
>>
>>     On Tue, Jan 16, 2018 at 1:30 PM, Ing. Luca Lazzeroni - Trend
>>     Servizi Srl <luca at gvnet.it <mailto:luca at
gvnet.it>> wrote:
>>
>>         Hi to everyone.
>>
>>         I've got a strange problem with a gluster setup: 3 nodes
with
>>         Centos 7.4, Gluster 3.12.4 from Centos/Gluster repositories,
>>         QEMU-KVM version 2.9.0 (compiled from RHEL sources).
>>
>>         I'm running volumes in replica 3 arbiter 1 mode (but
I've got
>>         a volume in "pure" replica 3 mode too). I've
applied the
>>         "virt" group settings to my volumes since they host
VM images.
>>
>>         If I try to install something (eg: Ubuntu Server 16.04.3) on
>>         a VM (and so I generate a bit of I/O inside it) and configure
>>         KVM to access gluster volume directly (via libvirt), install
>>         fails after a while because the disk content is corrupted. If
>>         I inspect the block inside the disk (by accessing the image
>>         directly from outside) I can found many files filled with
"^@".
>>
>>
>> Also, what exactly do you mean by accessing the image directly from 
>> outside? Was it from the brick directories directly? Was it from the 
>> mount point of the volume? Could you elaborate? Which files exactly 
>> did you check?
>>
>> -Krutika
>>
>>
>>         If, instead, I configure KVM to access VM images via a FUSE
>>         mount, everything seems to work correctly.
>>
>>         Note that the problem with install is verified 100% time with
>>         QCOW2 image, while it appears only after with RAW disk images.
>>
>>         Is there anyone who experienced the same problem ?
>>
>>         Thank you,
>>
>>
>>         -- 
>>         Ing. Luca Lazzeroni
>>         Responsabile Ricerca e Sviluppo
>>         Trend Servizi Srl
>>         Tel: 0376/631761
>>         Web: https://www.trendservizi.it
>>
>>         _______________________________________________
>>         Gluster-users mailing list
>>         Gluster-users at gluster.org <mailto:Gluster-users at
gluster.org>
>>         http://lists.gluster.org/mailman/listinfo/gluster-users
>>         <http://lists.gluster.org/mailman/listinfo/gluster-users>
>>
>>
>>
>
> -- 
> Ing. Luca Lazzeroni
> Responsabile Ricerca e Sviluppo
> Trend Servizi Srl
> Tel: 0376/631761
> Web:https://www.trendservizi.it
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
-- 
Ing. Luca Lazzeroni
Responsabile Ricerca e Sviluppo
Trend Servizi Srl
Tel: 0376/631761
Web: https://www.trendservizi.it

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Ing. Luca Lazzeroni - Trend Servizi Srl

2018-Jan-16 17:17 UTC

head link

[Gluster-users] [Possibile SPAM] Re: Problem with Gluster 3.12.4, VM and sharding

I've made the test with raw image format (preallocated too) and the 
corruption problem is still there (but without errors in bricks' log file).

What does the "link" error in bricks log files means ?

I've seen the source code looking for the lines where it happens and it 
seems a warning (it doesn't imply a failure).



Il 16/01/2018 17:39, Ing. Luca Lazzeroni - Trend Servizi Srl ha
scritto:>
> An update:
>
> I've tried, for my tests, to create the vm volume as
>
> qemu-img create -f qcow2 -o preallocation=full 
> gluster://gluster1/Test/Test-vda.img 20G
>
> et voila !
>
> No errors at all, neither in bricks' log file (the "link
failed"
> message disappeared), neither in VM (no corruption and installed 
> succesfully).
>
> I'll do another test with a fully preallocated raw image.
>
>
>
> Il 16/01/2018 16:31, Ing. Luca Lazzeroni - Trend Servizi Srl ha scritto:
>>
>> I've just done all the steps to reproduce the problem.
>>
>> Tha VM volume has been created via "qemu-img create -f qcow2 
>> Test-vda2.qcow2 20G" on the gluster volume mounted via FUSE.
I've
>> tried also to create the volume with preallocated metadata, which 
>> moves the problem a bit far away (in time). The volume is a replice 3 
>> arbiter 1 volume hosted on XFS bricks.
>>
>> Here are the informations:
>>
>> [root at ovh-ov1 bricks]# gluster volume info gv2a2
>>
>> Volume Name: gv2a2
>> Type: Replicate
>> Volume ID: 83c84774-2068-4bfc-b0b9-3e6b93705b9f
>> Status: Started
>> Snapshot Count: 0
>> Number of Bricks: 1 x (2 + 1) = 3
>> Transport-type: tcp
>> Bricks:
>> Brick1: gluster1:/bricks/brick2/gv2a2
>> Brick2: gluster3:/bricks/brick3/gv2a2
>> Brick3: gluster2:/bricks/arbiter_brick_gv2a2/gv2a2 (arbiter)
>> Options Reconfigured:
>> storage.owner-gid: 107
>> storage.owner-uid: 107
>> user.cifs: off
>> features.shard: on
>> cluster.shd-wait-qlength: 10000
>> cluster.shd-max-threads: 8
>> cluster.locking-scheme: granular
>> cluster.data-self-heal-algorithm: full
>> cluster.server-quorum-type: server
>> cluster.quorum-type: auto
>> cluster.eager-lock: enable
>> network.remote-dio: enable
>> performance.low-prio-threads: 32
>> performance.io-cache: off
>> performance.read-ahead: off
>> performance.quick-read: off
>> transport.address-family: inet
>> nfs.disable: off
>> performance.client-io-threads: off
>>
>> /var/log/glusterfs/glusterd.log:
>>
>> [2018-01-15 14:17:50.196228] I [MSGID: 106488] 
>> [glusterd-handler.c:1548:__glusterd_handle_cli_get_volume] 
>> 0-management: Received get vol req
>> [2018-01-15 14:25:09.555214] I [MSGID: 106488] 
>> [glusterd-handler.c:1548:__glusterd_handle_cli_get_volume] 
>> 0-management: Received get vol req
>>
>> (empty because today it's 2018-01-16)
>>
>> /var/log/glusterfs/glustershd.log:
>>
>> [2018-01-14 02:23:02.731245] I 
>> [glusterfsd-mgmt.c:1821:mgmt_getspec_cbk] 0-glusterfs: No change in 
>> volfile,continuing
>>
>> (empty too)
>>
>> /var/log/glusterfs/bricks/brick-brick2-gv2a2.log (the interested
volume):
>>
>> [2018-01-16 15:14:37.809965] I [MSGID: 115029] 
>> [server-handshake.c:793:server_setvolume] 0-gv2a2-server: accepted 
>> client from 
>> ovh-ov1-10302-2018/01/16-15:14:37:790306-gv2a2-client-0-0-0 (version: 
>> 3.12.4)
>> [2018-01-16 15:16:41.471751] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.4
failed
>> [2018-01-16 15:16:41.471745] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.4
->
>>
/bricks/brick2/gv2a2/.glusterfs/a0/14/a0144df3-8d89-4aed-872e-5fef141e9e1efailed
>> [File exists]
>> [2018-01-16 15:16:42.593392] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.5
->
>>
/bricks/brick2/gv2a2/.glusterfs/eb/04/eb044e6e-3a23-40a4-9ce1-f13af148eb67failed
>> [File exists]
>> [2018-01-16 15:16:42.593426] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.5
failed
>> [2018-01-16 15:17:04.129593] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.8
->
>>
/bricks/brick2/gv2a2/.glusterfs/dc/92/dc92bd0a-0d46-4826-a4c9-d073a924dd8dfailed
>> [File exists]
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.8
->
>>
/bricks/brick2/gv2a2/.glusterfs/dc/92/dc92bd0a-0d46-4826-a4c9-d073a924dd8dfailed
>> [File exists]" repeated 5 times between [2018-01-16
15:17:04.129593]
>> and [2018-01-16 15:17:04.129593]
>> [2018-01-16 15:17:04.129661] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.8
failed
>> [2018-01-16 15:17:08.279162] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9
->
>>
/bricks/brick2/gv2a2/.glusterfs/c9/b7/c9b71b00-a09f-4df1-b874-041820ca8241failed
>> [File exists]
>> [2018-01-16 15:17:08.279162] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9
->
>>
/bricks/brick2/gv2a2/.glusterfs/c9/b7/c9b71b00-a09f-4df1-b874-041820ca8241failed
>> [File exists]
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9
->
>>
/bricks/brick2/gv2a2/.glusterfs/c9/b7/c9b71b00-a09f-4df1-b874-041820ca8241failed
>> [File exists]" repeated 2 times between [2018-01-16
15:17:08.279162]
>> and [2018-01-16 15:17:08.279162]
>>
>> [2018-01-16 15:17:08.279177] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.9
failed
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.4
->
>>
/bricks/brick2/gv2a2/.glusterfs/a0/14/a0144df3-8d89-4aed-872e-5fef141e9e1efailed
>> [File exists]" repeated 6 times between [2018-01-16
15:16:41.471745]
>> and [2018-01-16 15:16:41.471807]
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.5
->
>>
/bricks/brick2/gv2a2/.glusterfs/eb/04/eb044e6e-3a23-40a4-9ce1-f13af148eb67failed
>> [File exists]" repeated 2 times between [2018-01-16
15:16:42.593392]
>> and [2018-01-16 15:16:42.593430]
>> [2018-01-16 15:17:32.229689] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.14 
>> -> 
>>
/bricks/brick2/gv2a2/.glusterfs/53/04/530449fa-d698-4928-a262-9a0234232323failed
>> [File exists]
>> [2018-01-16 15:17:32.229720] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.14 
>> failed
>> [2018-01-16 15:18:07.154330] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.17 
>> -> 
>>
/bricks/brick2/gv2a2/.glusterfs/81/96/8196dd19-84bc-4c3d-909f-8792e9b4929dfailed
>> [File exists]
>> [2018-01-16 15:18:07.154375] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.17 
>> failed
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.14 
>> -> 
>>
/bricks/brick2/gv2a2/.glusterfs/53/04/530449fa-d698-4928-a262-9a0234232323failed
>> [File exists]" repeated 7 times between [2018-01-16
15:17:32.229689]
>> and [2018-01-16 15:17:32.229806]
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.17 
>> -> 
>>
/bricks/brick2/gv2a2/.glusterfs/81/96/8196dd19-84bc-4c3d-909f-8792e9b4929dfailed
>> [File exists]" repeated 3 times between [2018-01-16
15:18:07.154330]
>> and [2018-01-16 15:18:07.154357]
>> [2018-01-16 15:19:23.618794] W [MSGID: 113096] 
>> [posix-handle.c:770:posix_handle_hard] 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.21 
>> -> 
>>
/bricks/brick2/gv2a2/.glusterfs/6d/02/6d02bd98-83de-43e8-a7af-b1d5f5160403failed
>> [File exists]
>> [2018-01-16 15:19:23.618827] E [MSGID: 113020] 
>> [posix.c:1485:posix_mknod] 0-gv2a2-posix: setting gfid on 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.21 
>> failed
>> The message "W [MSGID: 113096]
[posix-handle.c:770:posix_handle_hard]
>> 0-gv2a2-posix: link 
>> /bricks/brick2/gv2a2/.shard/62335cb9-c7b5-4735-a879-59cff93fe622.21 
>> -> 
>>
/bricks/brick2/gv2a2/.glusterfs/6d/02/6d02bd98-83de-43e8-a7af-b1d5f5160403failed
>> [File exists]" repeated 3 times between [2018-01-16
15:19:23.618794]
>> and [2018-01-16 15:19:23.618794]
>>
>> Thank you,
>>
>>
>> Il 16/01/2018 11:40, Krutika Dhananjay ha scritto:
>>> Also to help isolate the component, could you answer these:
>>>
>>> 1. on a different volume with shard not enabled, do you see this
issue?
>>> 2. on a plain 3-way replicated volume (no arbiter), do you see this
>>> issue?
>>>
>>>
>>>
>>> On Tue, Jan 16, 2018 at 4:03 PM, Krutika Dhananjay 
>>> <kdhananj at redhat.com <mailto:kdhananj at
redhat.com>> wrote:
>>>
>>>     Please share the volume-info output and the logs under
>>>     /var/log/glusterfs/ from all your nodes. for investigating the
>>>     issue.
>>>
>>>     -Krutika
>>>
>>>     On Tue, Jan 16, 2018 at 1:30 PM, Ing. Luca Lazzeroni - Trend
>>>     Servizi Srl <luca at gvnet.it <mailto:luca at
gvnet.it>> wrote:
>>>
>>>         Hi to everyone.
>>>
>>>         I've got a strange problem with a gluster setup: 3
nodes
>>>         with Centos 7.4, Gluster 3.12.4 from Centos/Gluster
>>>         repositories, QEMU-KVM version 2.9.0 (compiled from RHEL
>>>         sources).
>>>
>>>         I'm running volumes in replica 3 arbiter 1 mode (but
I've
>>>         got a volume in "pure" replica 3 mode too).
I've applied the
>>>         "virt" group settings to my volumes since they
host VM images.
>>>
>>>         If I try to install something (eg: Ubuntu Server 16.04.3)
on
>>>         a VM (and so I generate a bit of I/O inside it) and
>>>         configure KVM to access gluster volume directly (via
>>>         libvirt), install fails after a while because the disk
>>>         content is corrupted. If I inspect the block inside the
disk
>>>         (by accessing the image directly from outside) I can found
>>>         many files filled with "^@".
>>>
>>>
>>> Also, what exactly do you mean by accessing the image directly from
>>> outside? Was it from the brick directories directly? Was it from
the
>>> mount point of the volume? Could you elaborate? Which files exactly
>>> did you check?
>>>
>>> -Krutika
>>>
>>>
>>>         If, instead, I configure KVM to access VM images via a FUSE
>>>         mount, everything seems to work correctly.
>>>
>>>         Note that the problem with install is verified 100% time
>>>         with QCOW2 image, while it appears only after with RAW disk
>>>         images.
>>>
>>>         Is there anyone who experienced the same problem ?
>>>
>>>         Thank you,
>>>
>>>
>>>         -- 
>>>         Ing. Luca Lazzeroni
>>>         Responsabile Ricerca e Sviluppo
>>>         Trend Servizi Srl
>>>         Tel: 0376/631761
>>>         Web: https://www.trendservizi.it
>>>
>>>         _______________________________________________
>>>         Gluster-users mailing list
>>>         Gluster-users at gluster.org <mailto:Gluster-users at
gluster.org>
>>>         http://lists.gluster.org/mailman/listinfo/gluster-users
>>>        
<http://lists.gluster.org/mailman/listinfo/gluster-users>
>>>
>>>
>>>
>>
>> -- 
>> Ing. Luca Lazzeroni
>> Responsabile Ricerca e Sviluppo
>> Trend Servizi Srl
>> Tel: 0376/631761
>> Web:https://www.trendservizi.it
>>
>>
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> http://lists.gluster.org/mailman/listinfo/gluster-users
>
> -- 
> Ing. Luca Lazzeroni
> Responsabile Ricerca e Sviluppo
> Trend Servizi Srl
> Tel: 0376/631761
> Web:https://www.trendservizi.it
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
-- 
Ing. Luca Lazzeroni
Responsabile Ricerca e Sviluppo
Trend Servizi Srl
Tel: 0376/631761
Web: https://www.trendservizi.it

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