Re: [pve-devel] [RFC PATCH-SERIES ha-manager 0/2] Negative Node Affinity Rules

[Fiona Ebner <f.ebner@proxmox.com>]

Am 25.02.26 um 9:45 AM schrieb Daniel Kral:
> On Tue Feb 24, 2026 at 1:22 PM CET, Fiona Ebner wrote:
>> Am 19.12.25 um 2:36 PM schrieb Daniel Kral:
>>> For larger HA clusters, specifying the nodes in simple* node affinity
>>> rules as opt-out (negative) instead of opt-in (positive) can make the
>>> rule set easier to follow and implement by users.
>>>
>>> * simple = without priority groups
>>>
>>>
>>> There's no web interface integration yet, because I'm not entirely sure
>>> yet how to integrate it with the concept of priority groups for positive
>>> node affinity rules, which do not make sense in this context as the
>>> specified nodes will be removed from the effective node set.
>>
>> Wouldn't it be enough to not use/show the priority column when the
>> affinity is negative?
>>
>> If people need both, to exclude certain nodes and to prioritize certain
>> others, they can use two rules:
>> 1. a negative node affinity rule
>> 2. a non-strict positive node affinity rule with priorities
> 
> Yes, this would only need some changes in the checks for node affinity
> rules to allow both types for a HA resource at once and a check that
> they do not contradict one another.
> 
> I'm only contemplating about whether this could bite us later on if we
> allow those rule sets and should wait for the demand for this.

Waiting for demand is fine by me :)

>>> As the conversion is pretty straightforward, we could even allow users
>>> to convert between positive and negative node affinity rules (e.g. when
>>> switching the affinity type in the web interface?).
>>
>> Limited to those without priorities I suppose ;)
> 
> Right :).
> 
> I'll see what makes sense in the web interface then, but it would
> probably be the easiest to restrict changing the type of the node
> affinity rule after it was created... Other options would be to either
> just reset the node selection or drop the node priorities and invert the
> selection if users change from 'positive' to 'negative'.

Here too.