[Gluster-users] Repair after accident

[Mathias Waack]

Hi Strahil,

but I cannot find these files in the heal info:

find /zbrick/.glusterfs -links 1 -ls | grep -v ' -> '
...
7443397  132463 -rw-------   1 999      docker   1073741824 Aug  3 10:35 
/zbrick/.glusterfs/b5/3c/b53c8e46-068b-4286-94a6-7cf54f711983

Now looking for this file in the heal infos:

gluster volume heal gvol info | grep b53c8e46-068b-4286-94a6-7cf54f711983

shows nothing.

So I do not know, what I have to heal...

Mathias

On 07.08.20 14:32, Strahil Nikolov wrote:
> Have you tried to gluster heal and check if the files are back into their place?
>
> I always thought that those hard links are used  by the healing mechanism  and if that is true - gluster should restore the files to their original location and then wiping the correct files from FUSE will be easy.
>
> Best Regards,
> Strahil Nikolov
>
> На 7 август 2020 г. 10:24:38 GMT+03:00, Mathias Waack <mathias.waack at seim-partner.de> написа:
>> Hi all,
>>
>> maybe I should add some more information:
>>
>> The container which filled up the space was running on node x, which
>> still shows a nearly filled fs:
>>
>> 192.168.1.x:/gvol  2.6T  2.5T  149G  95% /gluster
>>
>> nearly the same situation on the underlying brick partition on node x:
>>
>> zdata/brick     2.6T  2.4T  176G  94% /zbrick
>>
>> On node y the network card crashed, glusterfs shows the same values:
>>
>> 192.168.1.y:/gvol  2.6T  2.5T  149G  95% /gluster
>>
>> but different values on the brick:
>>
>> zdata/brick     2.9T  1.6T  1.4T  54% /zbrick
>>
>> I think this happened because glusterfs still has hardlinks to the
>> deleted files on node x? So I can find these files with:
>>
>> find /zbrick/.glusterfs -links 1 -ls | grep -v ' -> '
>>
>> But now I am lost. How can I verify these files really belongs to the
>> right container? Or can I just delete this files because there is no
>> way
>> to access it? Or offers glusterfs a way to solve this situation?
>>
>> Mathias
>>
>> On 05.08.20 15:48, Mathias Waack wrote:
>>> Hi all,
>>>
>>> we are running a gluster setup with two nodes:
>>>
>>> Status of volume: gvol
>>> Gluster process                             TCP Port  RDMA Port
>>> Online  Pid
>>>
>> ------------------------------------------------------------------------------
>>
>>> Brick 192.168.1.x:/zbrick                  49152     0 Y 13350
>>> Brick 192.168.1.y:/zbrick                  49152     0 Y 5965
>>> Self-heal Daemon on localhost               N/A       N/A Y 14188
>>> Self-heal Daemon on 192.168.1.93            N/A       N/A Y 6003
>>>
>>> Task Status of Volume gvol
>>>
>> ------------------------------------------------------------------------------
>>
>>> There are no active volume tasks
>>>
>>> The glusterfs hosts a bunch of containers with its data volumes. The
>>> underlying fs is zfs. Few days ago one of the containers created a
>> lot
>>> of files in one of its data volumes, and at the end it completely
>>> filled up the space of the glusterfs volume. But this happened only
>> on
>>> one host, on the other host there was still enough space. We finally
>>> were able to identify this container and found out, the sizes of the
>>> data on /zbrick were different on both hosts for this container. Now
>>> we made the big mistake to delete these files on both hosts in the
>>> /zbrick volume, not on the mounted glusterfs volume.
>>>
>>> Later we found the reason for this behavior: the network driver on
>> the
>>> second node partially crashed (which means we ware able to login on
>>> the node, so we assumed the network was running, but the card was
>>> already dropping packets at this time) at the same time, as the
>> failed
>>> container started to fill up the gluster volume. After rebooting the
>>> second node  the gluster became available again.
>>>
>>> Now the glusterfs volume is running again- but it is still (nearly)
>>> full: the files created by the container are not visible, but they
>>> still count into amount of free space. How can we fix this?
>>>
>>> In addition there are some files which are no longer accessible since
>>> this accident:
>>>
>>> tail access.log.old
>>> tail: cannot open 'access.log.old' for reading: Input/output error
>>>
>>> Looks like affected by this error are files which have been changed
>>> during the accident. Is there a way to fix this too?
>>>
>>> Thanks
>>>      Mathias
>>>
>>>
>>> ________
>>>
>>>
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>>
>>
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