3 Nodes Shared storage options

[Eric Van den Bossche]

Hi All,

Small home cluster here, no HA needed, just need the possibility to move VM's between 2 nodes in order to install regular updates or do hardware maintenance.

My cluster exists of 3 nodes, 2 of them are identical hardware (cpu i5 with 32GB ram) and host all the VM's, the 3th node is an intel NUC i5 with 8GB ram.
All 3 are joined in a cluster, so quorum is ok.

Right now the VM's reside on a Synology NAS over NFS. This works fine, but prevents me from keeping the NAS updated without shutting down all my VM's.

I was thinking if it was possible to create on the 2 identical nodes a shared storage with a 2TB drive in each node. Is this possible and what should I choose regarding the shared storage system?

Kind regards,
Eric

 

[Rares]

Hi Eric,

Just use ZFS and make sure to set the same storage name on both servers, for example 'local-zfs'.

You will setup replication between the node and the migration will be a breeze.

Bye,
Rares

 

[Eric Van den Bossche]

I would rather not use replication, what about Ceph, GlusterFS or RBD?

 

[LnxBil]

I would rather not use replication, what about Ceph, GlusterFS or RBD?

Although Ceph is technical possible, it will not be fast on this hardware. You forget DRBD in your listing, RBD is Ceph.