[Gluster-users] Bareos backup from Gluster mount
Soumya Koduri
skoduri at redhat.com
Thu Jul 30 10:04:46 UTC 2015
On 07/30/2015 01:07 PM, Pranith Kumar Karampuri wrote:
> Added folks who work on nfs on gluster. Let's see.
>
> Pranith
>
> On 07/30/2015 09:25 AM, Ryan Clough wrote:
>> Okay, I think this has to do with Gluster NFS even though I was not
>> accessing the Gluster volume via NFS.
>>
>> Directly on the bricks the files look like this:
>>
>> Hgluster01
>> -r--r--r--. 2 602 602 832M Apr 3 06:17 scan_89.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_90.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_91.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_92.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_94.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_95.tar.bak
>> -r--r--r--. 2 602 602 839M Apr 3 11:39 scan_96.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_98.tar.bak
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_99.tar.bak
>>
>> Hgluster02
>> ---------T 2 nfsnobody nfsnobody 0 Jul 13 11:42 scan_89.tar.bak
>> -r--r--r--. 2 602 602 869939200 Apr 3 07:36 scan_90.tar.bak
>> -r--r--r--. 2 602 602 868331520 Apr 3 09:36 scan_91.tar.bak
>> -r--r--r--. 2 602 602 870092800 Apr 3 09:37 scan_92.tar.bak
>> -r--r--r--. 2 602 602 875448320 Apr 3 09:39 scan_93.tar.bak
>> -r--r--r--. 2 602 602 870656000 Apr 3 09:40 scan_94.tar.bak
>> -r--r--r--. 2 602 602 869396480 Apr 3 11:38 scan_95.tar.bak
>> -r--r--r--. 2 602 602 881858560 Apr 3 11:40 scan_97.tar.bak
>> -r--r--r--. 2 602 602 868188160 Apr 3 11:41 scan_98.tar.bak
>> -r--r--r--. 2 602 602 865382400 Apr 3 13:32 scan_99.tar.bak
>>
>> So I turned off NFS and from a client tried to move the files to see
>> if that would get rid of these weird nfsnobody files. Didn't work.
>> After moving the files to a new directory, the new directory still had
>> all of the nfsnobody files on the bricks.
>>
This is not an issue with Gluster NFS, but the expected behaviour when
the option 'server.root-squash' is on. To verify that, disable Gluster
NFS, enable this option and try to create a file via Gluster Native
mount. The uid/gid of the file created shall be the value of the options
anonuid/anongid which are by default 65534 (nfsnobody user - can be
checked in 'etc/passwd' file).
Could you please confirm if the option 'server.root-squash' is on for
your volume? If yes, are there any values set for 'server.anonuid' and
'server.anongid'.
Thanks,
Soumya
>> Next, I used rsync from the same client to copy all of the files to a
>> new directory and, lo and behold, the nfsnobody files were gone. I
>> tested a Bareos backup job and the data was read without issue from
>> both nodes. There was zero empty files.
>>
>> I guess I will blame Gluster NFS for this one? If you need any more
>> information from me, I would be happy to oblige.
>>
>> ___________________________________________
>> ¯\_(ツ)_/¯
>> Ryan Clough
>> Information Systems
>> Decision Sciences International Corporation
>> <http://www.decisionsciencescorp.com/><http://www.decisionsciencescorp.com/>
>>
>> On Wed, Jul 29, 2015 at 5:53 AM, Pranith Kumar Karampuri
>> <pkarampu at redhat.com <mailto:pkarampu at redhat.com>> wrote:
>>
>> hi Ryan,
>> What do you see in the logs of glusterfs mount and bricks?
>> Do you think it is possible for you to attach those logs to this
>> thread so that we can see what could be going on?
>>
>> Pranith
>>
>>
>> On 07/28/2015 02:32 AM, Ryan Clough wrote:
>>> Hello,
>>>
>>> I have cross-posted this question in the bareos-users mailing list.
>>>
>>> Wondering if anyone has tried this because I am unable to backup
>>> data that is mounted via Gluster Fuse or Gluster NFS. Basically,
>>> I have the Gluster volume mounted on the Bareos Director which
>>> also has the tape changer attached.
>>>
>>> Here is some information about versions:
>>> Bareos version 14.2.2
>>> Gluster version 3.7.2
>>> Scientific Linux version 6.6
>>>
>>> Our Gluster volume consists of two nodes in distribute only. Here
>>> is the configuration of our volume:
>>> [root at hgluster02 ~]# gluster volume info
>>>
>>> Volume Name: export_volume
>>> Type: Distribute
>>> Volume ID: c74cc970-31e2-4924-a244-4c70d958dadb
>>> Status: Started
>>> Number of Bricks: 2
>>> Transport-type: tcp
>>> Bricks:
>>> Brick1: hgluster01:/gluster_data
>>> Brick2: hgluster02:/gluster_data
>>> Options Reconfigured:
>>> performance.io-thread-count: 24
>>> server.event-threads: 20
>>> client.event-threads: 4
>>> performance.readdir-ahead: on
>>> features.inode-quota: on
>>> features.quota: on
>>> nfs.disable: off
>>> auth.allow: 192.168.10.*,10.0.10.*,10.8.0.*,10.2.0.*,10.0.60.*
>>> server.allow-insecure: on
>>> server.root-squash: on
>>> performance.read-ahead: on
>>> features.quota-deem-statfs: on
>>> diagnostics.brick-log-level: WARNING
>>>
>>> When I try to backup a directory from Gluster Fuse or Gluster NFS
>>> mount and I monitor the network communication I only see data
>>> being pulled from the hgluster01 brick. When the job finishes
>>> Bareos thinks that it completed without error but included in the
>>> messages for the job are lots and lots of permission denied
>>> errors like this:
>>> 15-Jul 02:03 ripper.red.dsic.com-fd JobId 613: Cannot open
>>> "/export/rclough/psdv-2014-archives-2/scan_111.tar.bak":
>>> ERR=Permission denied.
>>> 15-Jul 02:03 ripper.red.dsic.com-fd JobId 613: Cannot open
>>> "/export/rclough/psdv-2014-archives-2/run_219.tar.bak":
>>> ERR=Permission denied.
>>> 15-Jul 02:03 ripper.red.dsic.com-fd JobId 613: Cannot open
>>> "/export/rclough/psdv-2014-archives-2/scan_112.tar.bak":
>>> ERR=Permission denied.
>>> 15-Jul 02:03 ripper.red.dsic.com-fd JobId 613: Cannot open
>>> "/export/rclough/psdv-2014-archives-2/run_220.tar.bak":
>>> ERR=Permission denied.
>>> 15-Jul 02:03 ripper.red.dsic.com-fd JobId 613: Cannot open
>>> "/export/rclough/psdv-2014-archives-2/scan_114.tar.bak":
>>> ERR=Permission denied.
>>>
>>> At first I thought this might be a root-squash problem but, if I
>>> try to read/copy a file using the root user from the Bareos
>>> server that is trying to do the backup, I can read files just fine.
>>>
>>> When the job finishes is reports that it finished "OK -- with
>>> warnings" but, again the log for the job is filled with
>>> "ERR=Permission denied" messages. In my opinion, this job did not
>>> finish OK and should be Failed. Some of the files from the
>>> HGluster02 brick are backed up but all of the ones with
>>> permission errors do not. When I restore the job, all of the
>>> files with permission errors are empty.
>>>
>>> Has anyone successfully used Bareos to backup data from Gluster
>>> mounts? This is an important use case for us because this is the
>>> largest single volume that we have to prepare large amounts of
>>> data to be archived.
>>>
>>> Thank you for your time,
>>> ___________________________________________
>>> ¯\_(ツ)_/¯
>>> Ryan Clough
>>> Information Systems
>>> Decision Sciences International Corporation
>>> <http://www.decisionsciencescorp.com/><http://www.decisionsciencescorp.com/>
>>>
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>>
>>
>>
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