Hi Emmanuel,
El 29/12/16 a las 11:23, Emmanuel Kasper escribió:
On 12/20/2016 12:43 PM, Eneko Lacunza wrote:
Hi,
Sure, I meant datacenter, sorry; I didn't realize the acronym was in
spanish :)
So let me rewrite the question :-)
We are doing a preliminary study for a VMWare installation migration to
Proxmox (14 hosts total, 7 in each datacenter).
Currently, customer has 2 datacenters in HA, so that if the main
datacenter goes down, all VMs are restarted in backup datacenter.
Storage is SAN and storage data is replicated using SAN capabilities.
What can be done with Proxmox to get the same HA capabilities? Would it
be better to have 2 independent clusters, one in each datacenter, or a
unique cluster with two failure domains?
I have some worries about quorum for a single-cluster, but I don't think
Proxmox has anything prepared for cross-cluster HA?
Thanks a lot
Eneko
Proxmox clustering uses Corosync for cluster connection, and corosync
needs a low latency link between nodes, in the 5 ms range.
If you have a direct *high reliable* fiber link between your two DC /
CPD this might work. See this latency calculator
http://wintelguy.com/wanlat.html
In that case you could build a multi site cluster.
You could also set up HA beween your two DCs at the application level,
for instance using a bunch of stateless applications servers connecting
to a DB, where you want only need to setup HA at the DB level (Hint:
streaming replication if using PostgreSQL)
Thanks for the hints!
Eneko
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