[ClusterLabs] Asking about Clusterlabs cross DC cluster

[Ken Gaillot]

Hi,

Yes, it's fine as long as the latency is reasonably low, and you have
some form of fencing that can work if the link between them is lost. 

sbd is a good choice for fencing if each node has a hardware watchdog.
With two nodes, you really need a third site with either shared storage
(for disk-based sbd) or qdevice (to give true quorum to diskless sbd).

If you have redundant network paths between the data centers, you could
use a traditional fence device instead (such as a smart power strip).
You have to be careful to avoid single points of failure in this design
(for example, if both cables run through the same conduit).

On Thu, 2023-08-17 at 20:55 +0100, Adil Bouazzaoui wrote:
> Hello,
> 
> my name is adil, i got your email from Clusterlabs site.
> i'm wondering if i can setup a cluster with Corosync/pacemaker for a
> cross DC cluster?
> 
> for example:
> Node 1 (Master) in VLAN 1: 172.30.100.10 /24
> Node 2 (slave) in VLAN 2: 172.30.200.10 /24
> 
> Note: i deployed Centeron HA Cluster with Corosync/Pacemaker on same
> VLAN and it's working fine.
> my idea is to move Slave node on another site (VLAN 2).
> 
> Thank you in advance
> 
> 
> -- 
> 
> Adil Bouazzaoui
-- 
Ken Gaillot <kgaillot at redhat.com>