Code review comment for lp:~axwalk/juju-core/lp1233924-simplestreams-getmetadata-fallback

> So, after discussing with jam, GetMetadata *might* be how it is on
purpose. You
> might want to populate metadata into your private cloud, and then
expect only to
> be able to create images that match your private metadata.

> I'll leave this for now, until it's decided how it should be working.

I think that it should be a configuration option to specify "don't
fall-back to other sources".

https://codereview.appspot.com/14218044/