Is there someplace where all the ec2_group options are defined? Even the example in http://docs.ansible.com/ec2_group_module.html refers to options that are not defined. Then I ran across purge* options in some roles that I can find no info on.
Answer: The code has excellent docs.
(https://github.com/ansible/ansible-modules-core/blob/devel/cloud/amazon/ec2_group.py)