[Gluster-devel] Question regarding to gluster and vfs

[Ilan Schwarts]

Hi,
So this is a bit odd case.
I have created 2 servers nodes (running CentOS 7.3)
>From Client machine (CentOS 7.2) I mount to one of the nodes (nfs) using:
[root at CentOS7286-64 mnt]#  mount -t nfs
L137B-GlusterFS-Node1.L137B-root.com:/volume1 /mnt/glustervianfs/

When i created (touch) a file over the NFS:
>From Client Machine:
[revivo at CentOS7286-64 glustervianfs]$ touch nfs3file
[revivo at CentOS7286-64 glustervianfs]$ id revivo
uid=2021(revivo) gid=2020(maccabi) groups=2020(maccabi),10(wheel)

On Server machine:
I monitor the file operations at VFS kernel level.
I receive 1 event of file create, and 2 events of set attribute changes.
What I see is that root creates the file (uid/gid of 0)
And then root (also) use chown and chgrp to set security (attribute)
of the new file.

When i go to the glutser volume itself and ls -la,i do see the
*correct* (2021 - revivo /2020 - revivo) uid/gid:
[root at L137B-GlusterFS-Node1 volume1]# ls -lia
total 24
11 drwxrwxrwx.  3 revivo maccabi 4096 Aug 10 12:13 .
 2 drwxr-xr-x.  3 root   root    4096 Aug  9 14:32 ..
12 drw-------. 16 root   root    4096 Aug 10 12:13 .glusterfs
31 -rw-r--r--.  2 revivo maccabi    0 Aug 10 12:13 nfs3file

Why on the VFS layer i get uid/gid - 0/0