At work today I needed an easy way to collect private IP addresses of every instance in one of our production VPCs.
I ended up adding a tool to https://botoform.com to perform this task.
bf --profile <aws_profile> dump <vpc_name_tag> instances --output-format json
For example:
bf --profile customer3 dump prd instances --output-format json > ~/customer3-prd-instances.json
Checkout the Botoform Quickstart for installation instructions.