[Fab-user] Create Dynamic env.hosts at runtime

[JA]

Hi Everyone;

I am really just looking for creative ideas here and was hoping that
some of you who have more experience with Fabric might be able to make
some suggestions.

For certain tasks and jobs, I may have a large number of servers that
I need to interact with.  Attempting to store all of the hosts in a
variable in the fabfile is not a very manageable option.  I am looking
for a way to dynamically set the env.hosts at runtime by reading a
file or some other method but, I am very new to Fabric and was
wondering how anyone else might have tackled this challenge which I am
sure is not unique to my environment.

Thanks in advance!
JA