[ClusterLabs] Beginner Question about VirtualDomain

Valentin Vidić vvidic at valentin-vidic.from.hr
Thu Jan 21 05:52:22 EST 2021

On Wed, Aug 19, 2020 at 01:10:08AM -0400, Digimer wrote:
> 3. We changed DRBD from v8.4 to 9.0, and this meant a few things had to
> change. We will integrate support for short-throw DR hosts (async "third
> node" in DRBD that is outside pacemaker). We run the resources to only
> allow a single primary normally and enable auto-promote. For
> live-migration, we temporarily enable live migration, promote the
> target, migrate, demote the old host and disable dual-primary. This
> makes it safer as it's far less likely that someone could accidentally
> start a VM on the passive node (not that it ever happened as our tools
> prevented it, but it was _possible_, so we wanted to improve that).

Can you share more info how you enable/disable dual-primary during
live migration?


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