[Linux-cluster] GNBD/GFS question

[Balagopal Pillai]

On Sat, 14 Jul 2007, mehmet celik wrote:
Hi,

        I have seen this before when i was evaluating gfs, in the scenario 
when a fenced node, when rebooted and is back up, still stays fenced. Please try manual unfencing  
like this. This worked for me -
gnbd_import -u <node name> -t <gnbd server>

Regards
Balagopal

> 
> hi james, are you using which the "gnbd_export" parameters ?? if you don't use
> "-c", you get this error (Cancelled login). Because the device has timeout.
> you check fence with "gnbd_import -c GNBD_SERVER_NAME" on other nodes...
> 
> you should use "gnbd_import -s XXXX -t YYYY" on GNBD_SERVER. XXXX is node_name
> or node_IP. YYYY is gnbd_server_name or gnbd_server_IP.
> 
> have a nice day..
> 
> Mehmet CELIK
> Istanbul/TURKEY
> 
> >From: James Fait <fait at anl.gov>
> >Reply-To: linux.clustering at redhat.com,linux clustering
> ><linux-cluster at redhat.com>
> >To: linux clustering <linux-cluster at redhat.com>
> >Subject: [Linux-cluster] GNBD/GFS question
> >Date: Sat, 14 Jul 2007 13:14:15 -0500
> >
> >I have run into the following problem using GNBD/GFS on a 4 node test
> >cluster I have set up.  I have been testing failure scenarios to make
> >sure that things will be handled correctly when a node is fenced using
> >fence_gnbd.
> >The cluster is a set of 4 dell 1u servers, with dual 1GB network
> >connections, one to the intranet, and the other to a storage net.  The
> >cluster communications all happen on the storage net.  Each machine has
> >a dns name, which is decoded to the hostname for logs, which is the
> >intranet address. The storage net also has name to ip resolution via the
> >hosts file, to names of the form cluster*.  Cluster29 is the gnbd server
> >node, and does not mount the gfs volume at all.  The other three nodes
> >do mount the gfs volume.
> >
> >This is the test that is currently causing the problem.
> >         I kill the network link for cluster28(com28) using the network
> >         switch to temporarily disable the link.
> >
> >         Cluster28 is fenced successfully. One of the other nodes handles
> >         the gfs cleanup.
> >
> >         The network link is restored.
> >
> >         Cluster28 attempts an orderly shutdown, and hangs on umount of
> >         gfs.  Later, it is power cycled to force reboot.
> >
> >         Cluster28 rejoins the cluster, and attempts to mount gfs.  The
> >         gnbd_import command fails with the error messages:
> >                 gnbd_recvd: ERROR login refused by the server,
> >                 quitting : Operation not permitted
> >                 gnbd_import: ERROR gnbd_recvd failed
> >
> >         Cluster29 reports the error:
> >                 com29 gnbd_serv[4794]: ERROR [gserv.c:468] client
> >                 cluster28 is banned. Canceling login
> >
> >What is happening, and what can I do about it?
> >
> >Sincerly
> >
> >Jim
> >--
> >James Fait, Ph.D.
> >Beamline Scientist, SER-CAT
> >APS, building 436B-008
> >Argonne National Laboratory
> >9700 S Cass Ave
> >Argonne, IL 60439
> >phone 630-252-0644
> >fax   630-252-0652
> >email fait at anl.gov
> >
> >--
> >Linux-cluster mailing list
> >Linux-cluster at redhat.com
> >https://www.redhat.com/mailman/listinfo/linux-cluster
> 
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