Question / Planning / Cluster

[macday]

Hi Proxmox-Team,

I have a question.

Why do I need a quorum if I have a 3-Node-Cluster where only on 2 Nodes are KVM´s (upon DRBD) and the 3rd Node ist just for Management (Multicast corosync and HA).

Thanks guys

macday

 

[e100]

I think two old posts of mine may answer your questions about why quorum is needed and a minimum of three nodes is suggested.

http://forum.proxmox.com/threads/8693-is-there-an-alternative-to-fencing-for-HA?p=49323#post49323

http://forum.proxmox.com/threads/8693-is-there-an-alternative-to-fencing-for-HA?p=49835#post49835

 

[macday]

Thank you Marco,

I understood the need of 3 nodes for the HA/Fencing...but do I need the quorum via ISCSI (centos virtual machine on the 3rd node) or does it help to have only 3 nodes without the ISCSI-stuff.

Thanks

best regards
Marco(...too)

 

[tom]

you need quorum in any case. if you have three nodes (or more) you do not need a quorum disk (iscsi), this is only a workaround for two-node setups.

 

[macday]

Thank you Tom...that helped me much.