[Linux-cluster] Cluster node hangs

[Elvir Kuric]

On 02/13/2011 10:14 AM, Sachin Bhugra wrote:
> Hi ,
>
> I have setup a two node cluster in lab, with Vmware Server, and hence 
> used manual fencing. It includes a iSCSI GFS2 partition and it service 
> Apache in Active/Passive mode.
>
> Cluster works and I am able to relocate service between nodes with no 
> issues. However, the problem comes when I shutdown the node, for 
> testing, which is presently holding the service. When the node becomes 
> unavailable, service gets relocated and GFS partition gets mounted on 
> the other node, however it is not accessible. If I try to do a "ls/du" 
> on GFS partition, the command hangs. On the other hand the node which 
> was shutdown gets stuck at "unmounting file system".
>
> I tried using fence_manual -n nodename and then fence_ack_manual -n 
> nodename, however it still remains the same.
>
> Can someone please help me is what I am doing wrong?
>
> Thanks,
>
>
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It would be good to see  /etc/fstab configuration used on cluster nodes. 
If /gfs partition is mounted manually it will not be unmounted correctly 
in case you restart node ( and not executing umount prior restart ), and 
will hang during shutdown/reboot process.

More at:  
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Global_File_System_2/index.html 


Regards,

Elvir


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