[lustre-discuss] problems accessing files as non-root user.

[Dilger, Andreas]

It may be your identity upcall on the MDS needs to be redirected?

Run the following commands on the MDS to verify e.g. UID=1000, assuming
your identity upcall is at /usr/sbin/l_getidentity:

  mds# ls -l $(lctl get_param -n mdt.*.identity_upcall) 
  mds# L_GETIDENTITY_TEST=true /usr/sbin/l_getidentity -d 1000



Cheers, Andreas
-- 
Andreas Dilger

Lustre Principal Architect
Intel High Performance Data Division

On 2016/12/12, 10:16, "lustre-discuss on behalf of Phill Harvey-Smith" <lustre-discuss-bounces at lists.lustre.org on behalf of p.harvey-smith at warwick.ac.uk> wrote:

    Hi All,
    
    I'm in the final step of upgrading our storage servers to lustre 2.8.
    
    The MDS/OSS are running on Centos 7.2 the clients are Ubuntu 12.04, 
    though I also have a virtual machine running on Centos 7.2 as a client, 
    both seem to exhibit the same problem.
    
    Our old environment was a 2.4 client and a 2.1 server.
    
    I have used rsync across ssh to sync the data from the old environment 
    to the new, this appeared to work correctly.
    
    However trying to access the data on the new clients (ether the Ubuntu 
    or Centos), as a non-root user results in strange errors and an 
    inability to access the files. Accessing them as root seems to work 
    without error.
    
    for example one of my filesystems is mounted as /home :
    
    192.168.0.6 at tcp0:/storage               /storage        lustre 
    defaults,_netdev,flock,noauto 0 0
    192.168.0.6 at tcp0:/home                  /home           lustre 
    defaults,_netdev,flock,noauto 0 0
    192.168.0.6 at tcp0:/scratch               /scratch        lustre 
    defaults,_netdev,flock,noauto 0 0
    
    for example as user stsxab doning an ls -la of /home results in many 
    entries such as :
    
    stsxab at test-r420:/home$ ls -la
    ls: .: Bad address
    ls: cannot access margaw: Permission denied
    ls: home.old: Bad address
    ls: strjab: Bad address
    ls: margbe: Bad address
    ls: strmah: Bad address
    ls: strkar: Bad address
    
    etc before a list of some of the directories.
    
    The following is also logged in /var/log/syslog :
    Dec 12 17:09:30 test-r420 kernel: [ 1622.960000] Lustre: Unmounted 
    home-client
    Dec 12 17:09:40 test-r420 kernel: [ 1633.122522] Lustre: Unmounted 
    home-client
    Dec 12 17:10:04 test-r420 kernel: [ 1656.968193] Lustre: Mounted home-client
    Dec 12 17:10:04 test-r420 kernel: [ 1656.968199] Lustre: Skipped 3 
    previous similar messages
    Dec 12 17:11:07 test-r420 kernel: [ 1720.170159] LustreError: 11-0: 
    home-MDT0000-mdc-ffff881002e2b000: operation ldlm_enqueue to node 
    192.168.0.6 at tcp failed: rc = -14
    
    But doing the ls as root works fine.
    
    Any idea what the problem is with this as I need to get it resolved or 
    roll back to the old client / servers and pospone until it is working 
    correctly.
    
    Cheers.
    
    Phill.
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