[Linux-cluster] Two-node cluster: Node attempts stateful merge after clean reboot

[emmanuel segura]

Fixed previous mail

clean_start=1 disable the startup fencing and if you use a quorum disk in
your cluster without expected_votes=1, when a node start after it has been
fenced, the node dosn't try to fence di remain node and doesn't try to
start the service, because rgmanager need a cluster quorate, so many people
around say clean_start=1 is dangerous, but no one give a clear reason, in
my production cluster a i have clvm+vg in exclusive
mode+(clean_start=1)+(master_
wins). so if you can explain me where is the problem :) i apriciate



2013/9/11 Digimer <lists at alteeve.ca>

> On 11/09/13 12:04, emmanuel segura wrote:
>
>> Hello Pascal
>>
>> For disable startup fencing you need clean_start=1 in the fence_daemon
>> tag, i saw in your previous mail you are using expected_votes="1", with
>> this setting every cluster node will be partitioned into two clusters
>> and operate independently, i recommended using a quorim disk with
>> master_wins parameter
>>
>
> This is a very bad idea and is asking for a split-brain, the main reason
> fencing exists at all.
>
>
> --
> Digimer
> Papers and Projects: https://alteeve.ca/w/
> What if the cure for cancer is trapped in the mind of a person without
> access to education?
>



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