Re: Bareos backup from Gluster mount

[Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx>]

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.

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

On Wed, Jul 29, 2015 at 5:53 AM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> 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@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

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