Comment 1 for bug 977481

Definitely needs to be considered as a long term goal. Bug #829420 would be one way to do it, with two environments being able to relate to one another as external services. But I think what you're talking about is being able to have one environment span multiple providers, which would be interesting.

The challenges that would also need to be overcome (I think this probably should be a blueprint when it is finally taken up):

* Security between the clouds. Right now charms can assume that all the units they're talking to are on the same cloud network, which offers a known degree of protection against unauthorized sniffing and/or man-in-the-middle attacks depend on the cloud provider.

* Latency issues. Some services won't work well at all when scaled out over long distance links.