Comment 1 for bug 1910733

The caveat there is that some values you can supply in "to:" imply
elasticity in themselves. eg "-to: lxd:" means that all the units of this
application end up in containers.

On Fri, Jan 8, 2021 at 5:55 AM Frode Nordahl <email address hidden>
wrote:

> Public bug reported:
>
> In a live fast-paced deployment scenario all kinds of things can go
> wrong which requires last minute changes to the scale of bundles to
> match the reality of available functional physical machines and other
> factors.
>
> When making changes to a bundle that has placement declared with the
> `to` key for all charms, the requirement for also specifying `num_units`
> becomes a nuisance and kills some of the elastic modeling feeling of the
> tool.
>
> It would be of great value to users of Juju if the requirement for
> specifying `num_units` could be removed when `to` is present for a
> charm, meaning that Juju would deduce the value of `num_units` from the
> contents of `to`.
>
> ** Affects: juju
> Importance: Undecided
> Status: New
>
>
> ** Tags: ps5
>
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> https://bugs.launchpad.net/bugs/1910733
>
> Title:
> num_units is redundant when charm declared with placement in a bundle
>
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