[pve-devel] student question about ha "restricted" option

[Alexandre DERUMIER]

>>Yes, Dietmar recalls correctly, nofailback does what your students expect.

>>The restricted version is for controlling failover.  Normally all nodes
>>which are not already group members are added to the group with -1 priority
>>(group member nodes can have minimum 0 as priority).  This allows recovery
>>even if no node from the group is left online but only if the restricted
>>option is *not* set, if its set the non group members won't get added to the
>>groups nodes.


Ok, thanks for the explain.

Maybe could we improve the documentation, and add some examples ?

(BTW, the students really love the new documentation, great job !)


----- Mail original -----
De: "Thomas Lamprecht" <t.lamprecht at proxmox.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Mercredi 28 Septembre 2016 17:50:05
Objet: Re: [pve-devel] student question about ha "restricted" option

On 28.09.2016 17:22, Dietmar Maurer wrote: 
>> 3 nodes: kvm1,kvm2,kvm3 
>> 
>> we have a ha group , with kvm1 && kvm2, with a vm in this group. Restricted 
>> option is disable. 
>> 
>> 
>> We are trying to live migrate the vm to kvm3. The vm is migrated back to 
>> kvm1/2. 
>> 
>> Students expected that without restricted option, the vm keep running on kvm3. 
> 
> AFAIR you need to set 'nofailback' for that. 
> 

Yes, Dietmar recalls correctly, nofailback does what your students expect. 

The restricted version is for controlling failover. Normally all nodes 
which are not already group members are added to the group with -1 priority 
(group member nodes can have minimum 0 as priority). This allows recovery 
even if no node from the group is left online but only if the restricted 
option is *not* set, if its set the non group members won't get added to the 
groups nodes. 

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