Two Node Cluster

[ELS_sean]

Hi All,

I posted a question about this buildout earlier and I think I am on the right track but I just needed some confirmation.

I have two servers both running proxmox4.4 each has a 2 TB drive with a single zfs (zraid0) on it.
I am setting up pvs-zsync to keep the two systems in sync the VMs with each other (I only have 14 VMs at the moment and only 6 or 7 are running at any give time but I want to be able to grow that number maybe 20% or so) .
Can I do migrations between the two nodes? or should I look at DRBD as a better solution?
Once the zsyncs are done do I need to turn on clustering (corosync?) to be able to migrations?

Once again if there are documents out there that I can reference please let me know.

Thanks,
Sean

 

[fireon]

I have two servers both running proxmox4.4 each has a 2 TB drive with a single zfs (zraid0) on it.

Very bad idea. No security. Do no use Raid0 in production!!!

I am setting up pvs-zsync to keep the two systems in sync the VMs

Yes thats fine. Depending on your datasets you need 10GBit for the network. And yes more then one disk/server

Can I do migrations between the two nodes? or should I look at DRBD as a better solution?

When you use pve-zsync you can't use migration with same VM. You can start the vm directly on the target by move the config from pve-zsyncdirectory. pve-zsync is more the manuelway, i think it was not designt for migrate a VM-process from host to host.
DRBD is not a real good solution... not any more: https://forum.proxmox.com/threads/drbdmanage-license-change.30404/
Better use 3 nodes and Ceph.

Once the zsyncs are done do I need to turn on clustering (corosync?) to be able to migrations?

Yes you need corosync.

 

[ghusson]

Suggestion : wait for the PVE v5 :
- migrate from local storage VMs (qemu)
- ZFS sync interface
And one other : do never use more than 75% of your pool