I am attempting to use a custom MAAS commissioning script to perform custom operations on my MAAS cluster. When do these scripts run? How should they be named? Do they need to be in a particular format, or can they be executable shell scripts or binaries?
What are you looking to accomplish with custom MAAS commissioning scripts? In my experience so far I have not had to load custom scripts and have made use of these examples and files in these locations installing MAAS and juju
http://maas.ubuntu.com/docs/configure.html - this link will take you to some better examples of I think what your looking for.
Hope this helps,