[Gluster-users] Rebalance + VM corruption - current status and request for feedback

Sun Jun 4 12:00:34 UTC 2017

Great news.
Is this planned to be published in next release?

Il 29 mag 2017 3:27 PM, "Krutika Dhananjay" <kdhananj at redhat.com> ha
scritto:

> Thanks for that update. Very happy to hear it ran fine without any issues.
> :)
>
> Yeah so you can ignore those 'No such file or directory' errors. They
> represent a transient state where DHT in the client process is yet to
> figure out the new location of the file.
>
> -Krutika
>
>
> On Mon, May 29, 2017 at 6:51 PM, Mahdi Adnan <mahdi.adnan at outlook.com>
> wrote:
>
>> Hello,
>>
>>
>> Yes, i forgot to upgrade the client as well.
>>
>> I did the upgrade and created a new volume, same options as before, with
>> one VM running and doing lots of IOs. i started the rebalance with force
>> and after it completed the process i rebooted the VM, and it did start
>> normally without issues.
>>
>> I repeated the process and did another rebalance while the VM running and
>> everything went fine.
>>
>> But the logs in the client throwing lots of warning messages:
>>
>>
>> [2017-05-29 13:14:59.416382] W [MSGID: 114031]
>> [client-rpc-fops.c:2928:client3_3_lookup_cbk] 2-gfs_vol2-client-2:
>> remote operation failed. Path: /50294ed6-db7a-418d-965f-9b44c
>> 69a83fd/images/d59487fe-f3a9-4bad-a607-3a181c871711/aa01c3a0-5aa0-432d-82ad-d1f515f1d87f
>> (93c403f5-c769-44b9-a087-dc51fc21412e) [No such file or directory]
>> [2017-05-29 13:14:59.416427] W [MSGID: 114031]
>> [client-rpc-fops.c:2928:client3_3_lookup_cbk] 2-gfs_vol2-client-3:
>> remote operation failed. Path: /50294ed6-db7a-418d-965f-9b44c
>> 69a83fd/images/d59487fe-f3a9-4bad-a607-3a181c871711/aa01c3a0-5aa0-432d-82ad-d1f515f1d87f
>> (93c403f5-c769-44b9-a087-dc51fc21412e) [No such file or directory]
>> [2017-05-29 13:14:59.808251] W [MSGID: 114031]
>> [client-rpc-fops.c:2928:client3_3_lookup_cbk] 2-gfs_vol2-client-2:
>> remote operation failed. Path: /50294ed6-db7a-418d-965f-9b44c
>> 69a83fd/images/d59487fe-f3a9-4bad-a607-3a181c871711/aa01c3a0-5aa0-432d-82ad-d1f515f1d87f
>> (93c403f5-c769-44b9-a087-dc51fc21412e) [No such file or directory]
>> [2017-05-29 13:14:59.808287] W [MSGID: 114031]
>> [client-rpc-fops.c:2928:client3_3_lookup_cbk] 2-gfs_vol2-client-3:
>> remote operation failed. Path: /50294ed6-db7a-418d-965f-9b44c
>> 69a83fd/images/d59487fe-f3a9-4bad-a607-3a181c871711/aa01c3a0-5aa0-432d-82ad-d1f515f1d87f
>> (93c403f5-c769-44b9-a087-dc51fc21412e) [No such file or directory]
>>
>>
>>
>> Although the process went smooth, i will run another extensive test
>> tomorrow just to be sure.
>>
>> --
>>
>> Respectfully
>> *Mahdi A. Mahdi*
>>
>> ------------------------------
>> *From:* Krutika Dhananjay <kdhananj at redhat.com>
>> *Sent:* Monday, May 29, 2017 9:20:29 AM
>>
>> *To:* Mahdi Adnan
>> *Cc:* gluster-user; Gandalf Corvotempesta; Lindsay Mathieson; Kevin
>> Lemonnier
>> *Subject:* Re: Rebalance + VM corruption - current status and request
>> for feedback
>>
>> Hi,
>>
>> I took a look at your logs.
>> It very much seems like an issue that is caused by a mismatch in
>> glusterfs client and server packages.
>> So your client (mount) seems to be still running 3.7.20, as confirmed by
>> the occurrence of the following log message:
>>
>> [2017-05-26 08:58:23.647458] I [MSGID: 100030] [glusterfsd.c:2338:main]
>> 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 3.7.20
>> (args: /usr/sbin/glusterfs --volfile-server=s1 --volfile-server=s2
>> --volfile-server=s3 --volfile-server=s4 --volfile-id=/testvol
>> /rhev/data-center/mnt/glusterSD/s1:_testvol)
>> [2017-05-26 08:58:40.901204] I [MSGID: 100030] [glusterfsd.c:2338:main]
>> 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 3.7.20
>> (args: /usr/sbin/glusterfs --volfile-server=s1 --volfile-server=s2
>> --volfile-server=s3 --volfile-server=s4 --volfile-id=/testvol
>> /rhev/data-center/mnt/glusterSD/s1:_testvol)
>> [2017-05-26 08:58:48.923452] I [MSGID: 100030] [glusterfsd.c:2338:main]
>> 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 3.7.20
>> (args: /usr/sbin/glusterfs --volfile-server=s1 --volfile-server=s2
>> --volfile-server=s3 --volfile-server=s4 --volfile-id=/testvol
>> /rhev/data-center/mnt/glusterSD/s1:_testvol)
>>
>> whereas the servers have rightly been upgraded to 3.10.2, as seen in
>> rebalance log:
>>
>> [2017-05-26 09:36:36.075940] I [MSGID: 100030] [glusterfsd.c:2475:main]
>> 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 3.10.2
>> (args: /usr/sbin/glusterfs -s localhost --volfile-id rebalance/testvol
>> --xlator-option *dht.use-readdirp=yes --xlator-option
>> *dht.lookup-unhashed=yes --xlator-option *dht.assert-no-child-down=yes
>> --xlator-option *replicate*.data-self-heal=off --xlator-option
>> *replicate*.metadata-self-heal=off --xlator-option
>> *replicate*.entry-self-heal=off --xlator-option *dht.readdir-optimize=on
>> --xlator-option *dht.rebalance-cmd=5 --xlator-option
>> *dht.node-uuid=7c0bf49e-1ede-47b1-b9a5-bfde6e60f07b --xlator-option
>> *dht.commit-hash=3376396580 <(337)%20639-6580> --socket-file
>> /var/run/gluster/gluster-rebalance-801faefa-a583-46b4-8eef-e0ec160da9ea.sock
>> --pid-file /var/lib/glusterd/vols/testvol/rebalance/7c0bf49e-1ede-47b1-b9a5-bfde6e60f07b.pid
>> -l /var/log/glusterfs/testvol-rebalance.log)
>>
>>
>> Could you upgrade all packages to 3.10.2 and try again?
>>
>> -Krutika
>>
>>
>> On Fri, May 26, 2017 at 4:46 PM, Mahdi Adnan <mahdi.adnan at outlook.com>
>> wrote:
>>
>>> Hi,
>>>
>>>
>>> Attached are the logs for both the rebalance and the mount.
>>>
>>>
>>>
>>> --
>>>
>>> Respectfully
>>> *Mahdi A. Mahdi*
>>>
>>> ------------------------------
>>> *From:* Krutika Dhananjay <kdhananj at redhat.com>
>>> *Sent:* Friday, May 26, 2017 1:12:28 PM
>>> *To:* Mahdi Adnan
>>> *Cc:* gluster-user; Gandalf Corvotempesta; Lindsay Mathieson; Kevin
>>> Lemonnier
>>> *Subject:* Re: Rebalance + VM corruption - current status and request
>>> for feedback
>>>
>>> Could you provide the rebalance and mount logs?
>>>
>>> -Krutika
>>>
>>> On Fri, May 26, 2017 at 3:17 PM, Mahdi Adnan <mahdi.adnan at outlook.com>
>>> wrote:
>>>
>>>> Good morning,
>>>>
>>>>
>>>> So i have tested the new Gluster 3.10.2, and after starting rebalance
>>>> two VMs were paused due to storage error and third one was not responding.
>>>>
>>>> After rebalance completed i started the VMs and it did not boot, and
>>>> throw an XFS wrong inode error into the screen.
>>>>
>>>>
>>>> My setup:
>>>>
>>>> 4 nodes running CentOS7.3 with Gluster 3.10.2
>>>>
>>>> 4 bricks in distributed replica with group set to virt.
>>>>
>>>> I added the volume to ovirt and created three VMs, i ran a loop to
>>>> create 5GB file inside the VMs.
>>>>
>>>> Added new 4 bricks to the existing nodes.
>>>>
>>>> Started rebalane "with force to bypass the warning message"
>>>>
>>>> VMs started to fail after rebalancing.
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Respectfully
>>>> *Mahdi A. Mahdi*
>>>>
>>>> ------------------------------
>>>> *From:* Krutika Dhananjay <kdhananj at redhat.com>
>>>> *Sent:* Wednesday, May 17, 2017 6:59:20 AM
>>>> *To:* gluster-user
>>>> *Cc:* Gandalf Corvotempesta; Lindsay Mathieson; Kevin Lemonnier; Mahdi
>>>> Adnan
>>>> *Subject:* Rebalance + VM corruption - current status and request for
>>>> feedback
>>>>
>>>> Hi,
>>>>
>>>> In the past couple of weeks, we've sent the following fixes concerning
>>>> VM corruption upon doing rebalance - https://review.gluster.org/#/q
>>>> /status:merged+project:glusterfs+branch:master+topic:bug-1440051
>>>>
>>>> These fixes are very much part of the latest 3.10.2 release.
>>>>
>>>> Satheesaran within Red Hat also verified that they work and he's not
>>>> seeing corruption issues anymore.
>>>>
>>>> I'd like to hear feedback from the users themselves on these fixes (on
>>>> your test environments to begin with) before even changing the status of
>>>> the bug to CLOSED.
>>>>
>>>> Although 3.10.2 has a patch that prevents rebalance sub-commands from
>>>> being executed on sharded volumes, you can override the check by using the
>>>> 'force' option.
>>>>
>>>> For example,
>>>>
>>>> # gluster volume rebalance myvol start force
>>>>
>>>> Very much looking forward to hearing from you all.
>>>>
>>>> Thanks,
>>>> Krutika
>>>>
>>>
>>>
>>
>
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