Comment 7 for bug 1792943

jameinel,

I overlooked the fact that constraints can be changed via `juju set-model-constraints #...` and `juju set-constraints <appname> #...` at a post-deployment stage.

https://docs.jujucharms.com/2.4/en/charms-constraints#setting-displaying-and-updating-constraints-for-an-application

So making a constraint on a certain pool and later updating it if needed seems reasonable.