[Lustre-discuss] Newbie - Unable to mount the OST on the Client

[Mohr Jr, Richard Frank (Rick Mohr)]

On Jan 7, 2015, at 1:46 PM, "Gupta, Amit" <amit.gupta at optum.com>
 wrote:

> I am not seeing any messages on the MGS.. The messages that I see on the Client ( on which I am trying the mount operation) are
> 
> Jan  7 17:32:27 client kernel: LustreError: 156-2: The client profile 'client1-client' could not be read from the MGS.  Does that filesystem exist?
> Jan  7 17:32:27 client kernel: LustreError: 11278:0:(lov_obd.c:951:lov_cleanup()) client1-clilov-ffff8810334fa000: lov tgt 0 not cleaned! deathrow=0, lovrc=1
> Jan  7 17:32:27 client kernel: Lustre: Unmounted client1-client
> Jan  7 17:32:27 client kernel: LustreError: 13411:0:(obd_mount.c:1342:lustre_fill_super()) Unable to mount  (-22)
> 
> Is there is a way to check if the Client is getting to the MGS to read the profile information.  That would atleast prove that the LNET configuration is good.


Hmm.  I was hoping that the MGS would have some info in the log messages that might shed some light on the error.  The fact that the MGS logs do not contain anything might be an indicator that the client's request is not making it to the MGS  (or at least not to the Lustre threads running on the MGS).

Since this is using TCP for communication, have you double checked that there aren't any firewall rules that might be blocking traffic?  If you are running iptables, you might want to just stop it on the servers and the clients to see if that helps.

-- 
Rick Mohr
Senior HPC System Administrator
National Institute for Computational Sciences
http://www.nics.tennessee.edu