venzo980
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Contributor

VSAN - migrating from 2node(+witness) to 3node

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Hi all!

I've a 2node cluster with witness installed on a another host that I need to dismiss. This host will be reinstalled and it will be joined to the cluster to form a 3node vsan cluster.

The correct procedure is to disable the stretched cluster removing the witness host and then join the 3rd node to the cluster.

The 2node cluster, in the meantime it will be without witness, will work as always but without fault tolerance right? Objects and vms accessibility will not be affected?

thanks in advance

venzo

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depping
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Leadership

That is indeed the correct process, please try to complete it in a reasonable amount of time, as the cluster is not protected during the process. if something fails then it will directly impacted the workloads!

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depping
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Leadership

That is indeed the correct process, please try to complete it in a reasonable amount of time, as the cluster is not protected during the process. if something fails then it will directly impacted the workloads!

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venzo980
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Hi depping,

thanks for your answer, I've just another question for you Smiley Happy

I think I'll need 3 hours to prepare the standalone host to join the cluster, it will be a problem?

Should I change the 60 minute default timer for rebuilding?

thanks!

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depping
Leadership
Leadership

No need to change the timer, as there's no place for rebuilding anyway in your situation. Normally that would be needed indeed, but in a 2-node that isn't needed.