[Linux-cluster] nodes boot synchronization sensitivity

[Stepan Kadlec]

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