[Linux-cluster] Adding a node back to cluster failing

[Zama Ques]

Hi All ,

Thanks  all for the replies . Let me make myself clear . I should have added it in the original mail. 
I did not configured manual fencing and our cluster was a two node cluster without any fencing device added  . But when one of the nodes failed , the other node is refusing to join the cluster . So , I was suggested (Not from Redhat Mailing List)  to remove the node which failed using manual fencing commands (fence_manual etc ) . So , here I used manual fencing commands .

Now I want to add the failed node back to the cluster as the hardware issue is resolved . We had plans of adding IPMI LAN as fencing device but before that I need to add the node back to cluster which is failing . Plz share the steps to add the node back to cluster .

Thanks
Zaman



On Monday, 4 November 2013 11:30 PM, David Teigland <teigland at redhat.com> wrote:
 
On Mon, Nov 04, 2013 at 09:31:08AM -0500, Digimer wrote:
> >>> We are having a node two cluster with manual fencing configuration .
> >>
> >> An HA cluster with manual fencing is no cluster at all.
> > 
> > No. It is a cluster. But it provides no high availability.
> 
> Let me echo Zama and Michael.
> 
>   Clusters without real fencing are not supported. Manual fencing was
> dropped because it's not reliable and it is way too easy for mistakes to
> happen.
> 
>   Please add real fencing. Test it to make sure it works. I expect
> things will start working fine then and you will have no trouble joining
> a node back to your cluster.

The dogmatic attitude against manual fencing is disturbing.  It is a
perfectly legitimate and useful way to run a cluster as long as it's used
appropriately and with an understanding of how it works, the limitations
and tradeoffs.

Dave


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