[ClusterLabs] Pacemaker newbie

[Antony Stone]

On Friday 13 September 2024 at 17:23:59, Taylor, Marc D wrote:

> We bought a storage system from Dell and they recommended to us that we
> should use a two-node cluster

I do hope you realise that a literal two-node cluster is not a good idea?

If the two nodes lose contact with each other, you get a situation called 
"split brain" where neither node can know what state the other node is in, and 
neither node can safely take over resources.

You should always have an odd number of nodes in a cluster, and provided more 
than 50% of the nodes can see each other, they will run resources; any node 
which cannot see enough other nodes to be in a group of more than 50% will 
stop running resources.

> to share the storage out as either NFS or SMB.

Do they explicitly say you can do both?

It might be possible to share a single storage resource using both NFS and 
SMB, but it must have some interesting file-locking capabilities.


Antony

-- 
There's a good theatrical performance about puns on in the West End.  It's a 
play on words.

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