[pve-devel] training question about HA && failback

Dietmar Maurer dietmar at proxmox.com
Wed Jun 8 17:18:18 CEST 2016



> On June 8, 2016 at 5:06 PM Alexandre DERUMIER <aderumier at odiso.com> wrote:
> 
> 
> Hi,
> 
> my students of this week traning, have a question about HA and failback:
> 
> 
> We have 3 host :
> 
> kvm1
> kvm2
> kvm3
> 
> 
> an HA group "kvm23" with kvm2 && kvm3
> 
> 
> We have a vm , with HA enable in group kvm23,with "nofailback" not enabled,
> "restricted" not enabled and vm is running on kvm3.
> 
> 
> kvm3 crash.
> 
> 
> the vm is restarted by HA to kvm2
> 
> 
> kvm3 is back online.
> 
> 
> vm does not failback to kvm3 ?

no, because it is still within the correct group (kvm2 && kvm3 has same
priority).

> The documentation said that it should failback to prefered node. But what is
> the prefered node ? any member of the group ?

yes, any member

> Students expected that vm fallback to last node before the crash.

You can give priorities within a group, something like

  nodes kvm3:2,kvm2:1


@thomas: can we update the manual page, and maybe add that to the GUI?



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