[Linux-cluster] nodes boot synchronization sensitivity

[Stepan Kadlec]

	oh, I have probably misunderstood the problem - the real cause seems be 
unsynchronized local clocks on the nodes...
	bye stepan


Stepan Kadlec wrote:
> hello,
> I have two_node cluster. If I synchronize the boot to the same time, 
> both nodes join fain and everything works.
> 
> I am trying to make it less sensitive to boot-time synchronization (to 
> accept at least two minutes difference) but the nodes never join and 
> after some time, one node is fenced.
> 
> I have prolonged the post_join_delay to 120 seconds, but even when both 
> nodes are trying to join in the nearly same time (~30 sec difference), 
> they are unsuccessful - the log shows
> 
>     "not a cluster member after 120 sec post_join_delay"
> 
> and the other node is fenced.
> 
> I am running the cluster in following steps:
> 
> cman_tool -t 120 -w join -n node1 -c cluster
> groupd
> fenced
> dlm_controld
> gfs_controld
> fence_tool -w -t 300 -m 20 join
> 
> how can I make the nodes less sensitive to boot synchronization?
> 
> thanks for your advices.
> stepan
> 
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