So you've just got all excited about the Metron Tech Preview, have downloaded the code and maybe have even followed the Apache Metron - First Steps in the Cloud article, but then EC2 instances pop up where you don't expect to see them!
at this stage the Metron Tech Preview deployment ignores some of the
systemwide settings that you might have in your .aws directory including
the preferred region and availability zone.
Thankfully all the settings are within the setup scripts instead so this is easy enough to correct.
There are two settings I'd suggest updating:
Contains the key settings you will need to change towards the top of the file: