Hello,
Could you explain the difference between dual-primary and primary/secondary please ?
We set up a cluster with two nodes and a quorum disk to enable HA with DRBD/LVM/ext3. Everything works properly, if we create a fault on one node, all the VMs on this fail-node are automatically restarted on the other node and the fail-node is fenced (no live migration because of ext3).
So everything works like a charm...but as i said, we don't really understand the difference between primary/primary and primary/secondary.
As we understand :
- With dual-primary mode, we are able to start multiple VMs on each node at the same time.
- With primary/secondary, only the primary can start VMs and the other node is used only when the primary fails.
Did we understand this behavior correctly ?
Could you explain the difference between dual-primary and primary/secondary please ?
We set up a cluster with two nodes and a quorum disk to enable HA with DRBD/LVM/ext3. Everything works properly, if we create a fault on one node, all the VMs on this fail-node are automatically restarted on the other node and the fail-node is fenced (no live migration because of ext3).
So everything works like a charm...but as i said, we don't really understand the difference between primary/primary and primary/secondary.
As we understand :
- With dual-primary mode, we are able to start multiple VMs on each node at the same time.
- With primary/secondary, only the primary can start VMs and the other node is used only when the primary fails.
Did we understand this behavior correctly ?