Re: group write permissions not being respected

[Pat Haley <phaley@xxxxxxx>]

Hi Pranith,

In attached file capture.pcap

On 09/01/2016 01:01 PM, Pranith Kumar Karampuri wrote:

You need to capture the file so that we can see the tcpdump in wireshark to inspect the uid/gid etc that are going out the wire.

On Thu, Sep 1, 2016 at 10:04 PM, Pat Haley <phaley@xxxxxxx> wrote:

Hi Pranith,

Here is the output when I'm trying a touch command that fails with "Permission denied"

[root@compute-11-10 ~]# tcpdump -nnSs 0 host 10.1.1.4
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
12:30:46.248293 IP 10.255.255.124.4215828946 > 10.1.1.4.2049: 208 getattr fh 0,0/22
12:30:46.252509 IP 10.1.1.4.2049 > 10.255.255.124.4215828946: reply ok 240 getattr NON 3 ids 0/3 sz 0
12:30:46.252596 IP 10.255.255.124.4232606162 > 10.1.1.4.2049: 300 getattr fh 0,0/22
12:30:46.253308 IP 10.1.1.4.2049 > 10.255.255.124.4232606162: reply ok 52 getattr ERROR: Permission denied
12:30:46.253358 IP 10.255.255.124.4249383378 > 10.1.1.4.2049: 216 getattr fh 0,0/22
12:30:46.260347 IP 10.1.1.4.2049 > 10.255.255.124.4249383378: reply ok 52 getattr ERROR: No such file or directory
12:30:46.300306 IP 10.255.255.124.931 > 10.1.1.4.2049: Flags [.], ack 1979284005, win 501, options [nop,nop,TS val 490628016 ecr 75449144], length 0
^C
7 packets captured
7 packets received by filter
0 packets dropped by kernel

On 09/01/2016 03:31 AM, Pranith Kumar Karampuri wrote:

hi Pat,
       I think the other thing we should probably look for would be to see the tcp dump of what uid/gid parameters are sent over network when this command is executed.

On Thu, Sep 1, 2016 at 7:14 AM, Pat Haley <phaley@xxxxxxx> wrote:

--------------------------------------------------------------------------------------------

hi Pat,

      Are you seeing this issue only after migration or even before? May be we should look at the gid numbers on the disk and the ones that are coming from client for the given user to see if they match or not?

-------------------------------------------------------------------------------------------------
This issue was not being seen before the migration.  We have copied the /etc/passwd and /etc/group files from the front-end machine (the client) to the data server, so they all match
-------------------------------------------------------------------------------------------------

Could you give stat output of the directory in question from both the brick and the nfs client

--------------------------------------------------------------------------------------------------
From the server for gluster:
[root@mseas-data2 ~]# stat /gdata/projects/nsf_alpha
  File: `/gdata/projects/nsf_alpha'
  Size: 4096          Blocks: 8          IO Block: 131072 directory
Device: 13h/19d    Inode: 13094773206281819436  Links: 13
Access: (2775/drwxrwsr-x)  Uid: (    0/    root)   Gid: (  598/nsf_alpha)
Access: 2016-08-31 19:08:59.735990904 -0400
Modify: 2016-08-31 16:37:09.048997167 -0400
Change: 2016-08-31 16:37:41.315997148 -0400

From the server for first underlying brick
[root@mseas-data2 ~]# stat /mnt/brick1/projects/nsf_alpha/
  File: `/mnt/brick1/projects/nsf_alpha/'
  Size: 4096          Blocks: 8          IO Block: 4096   directory
Device: 800h/2048d    Inode: 185630      Links: 13
Access: (2775/drwxrwsr-x)  Uid: (    0/    root)   Gid: (  598/nsf_alpha)
Access: 2016-08-31 19:08:59.669990907 -0400
Modify: 2016-08-31 16:37:09.048997167 -0400
Change: 2016-08-31 16:37:41.315997148 -0400

From the server for second underlying brick
[root@mseas-data2 ~]# stat /mnt/brick2/projects/nsf_alpha/
  File: `/mnt/brick2/projects/nsf_alpha/'
  Size: 4096          Blocks: 8          IO Block: 4096   directory
Device: 810h/2064d    Inode: 24085468    Links: 13
Access: (2775/drwxrwsr-x)  Uid: (    0/    root)   Gid: (  598/nsf_alpha)
Access: 2016-08-31 19:08:59.735990904 -0400
Modify: 2016-08-03 14:01:52.000000000 -0400
Change: 2016-08-31 16:37:41.315997148 -0400

From the client
[root@mseas FixOwn]# stat /gdata/projects/nsf_alpha
  File: `/gdata/projects/nsf_alpha'
  Size: 4096          Blocks: 8          IO Block: 1048576 directory
Device: 23h/35d    Inode: 13094773206281819436  Links: 13
Access: (2775/drwxrwsr-x)  Uid: (    0/    root)   Gid: (  598/nsf_alpha)
Access: 2016-08-31 19:08:59.735990904 -0400
Modify: 2016-08-31 16:37:09.048997167 -0400
Change: 2016-08-31 16:37:41.315997148 -0400

------------------------------------------------------------------------------------------------

Could you also let us know version of gluster you are using

-------------------------------------------------------------------------------------------------

[root@mseas-data2 ~]# gluster --version
glusterfs 3.7.11 built on Apr 27 2016 14:09:22

[root@mseas-data2 ~]# gluster volume info
 
Volume Name: data-volume
Type: Distribute
Volume ID: c162161e-2a2d-4dac-b015-f31fd89ceb18
Status: Started
Number of Bricks: 2
Transport-type: tcp
Bricks:
Brick1: mseas-data2:/mnt/brick1
Brick2: mseas-data2:/mnt/brick2
Options Reconfigured:
performance.readdir-ahead: on
nfs.disable: on
nfs.export-volumes: off

[root@mseas-data2 ~]# gluster volume status
Status of volume: data-volume
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick mseas-data2:/mnt/brick1               49154     0          Y       5005
Brick mseas-data2:/mnt/brick2               49155     0          Y       5010
 
Task Status of Volume data-volume
------------------------------------------------------------------------------
Task                 : Rebalance          
ID                   : 892d9e3a-b38c-4971-b96a-8e4a496685ba
Status               : completed   

      
[root@mseas-data2 ~]# gluster peer status
Number of Peers: 0

-------------------------------------------------------------------------------------------------

On Thu, Sep 1, 2016 at 2:46 AM, Pat Haley <phaley@xxxxxxx> wrote:

Hi,

Another piece of data.  There are 2 distinct volumes on the file server

1. a straight nfs partition
2. a gluster volume (served over nfs)
   

The straight nfs partition does respect the group write permissions, while the gluster volume does not.  Any suggestions on how to debug this or what additional information would be helpful would be greatly appreciated

Thanks

On 08/30/2016 06:01 PM, Pat Haley wrote:

Hi

We have just migrated our data to a new file server (more space, old server was showing its age). We have a volume for collaborative use, based on group membership.  In our new server, the group write permissions are not being respected (e.g.  the owner of a directory can still write to that directory but any other member of the associated group cannot, even though the directory clearly has group write permissions set).  This is occurring regardless of how many groups the user is a member of (i.e. users that are members of fewer then 16 groups are still affected).

the relevant fstab line from the server looks like
localhost:/data-volume /gdata    glusterfs       defaults 0 0

and for a client:
mseas-data2:/gdata       /gdata      nfs     defaults        0 0

Any help would be greatly appreciated.

Thanks

-- 

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley                          Email:  phaley@xxxxxxx
Center for Ocean Engineering       Phone:  (617) 253-6824
Dept. of Mechanical Engineering    Fax:    (617) 253-8125
MIT, Room 5-213                    http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA  02139-4301

_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users

--

Pranith

-- 

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley                          Email:  phaley@xxxxxxx
Center for Ocean Engineering       Phone:  (617) 253-6824
Dept. of Mechanical Engineering    Fax:    (617) 253-8125
MIT, Room 5-213                    http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA  02139-4301

_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users

--

Pranith

-- 

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley                          Email:  phaley@xxxxxxx
Center for Ocean Engineering       Phone:  (617) 253-6824
Dept. of Mechanical Engineering    Fax:    (617) 253-8125
MIT, Room 5-213                    http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA  02139-4301

_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users

--

Pranith

-- 

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley                          Email:  phaley@xxxxxxx
Center for Ocean Engineering       Phone:  (617) 253-6824
Dept. of Mechanical Engineering    Fax:    (617) 253-8125
MIT, Room 5-213                    http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA  02139-4301

Attachment: capture.pcap
Description: application/vnd.tcpdump.pcap

_______________________________________________
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
http://www.gluster.org/mailman/listinfo/gluster-users