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AWS security group dependency walker

list AWS security group dependencies, so you know which security group has reference to other group

it can be used to find out the security group used by which ec2/elb/rds/lambda/redshift/elasticache/eni instance

or you can list security groups not used by any of ec2/elb/rds/lambda/redshift/elasticache/eni instance and can be safely deleted

requirements

Python 3+ and boto3 installed. you can install boto3 by:

pip install boto3

Install

download the python file https://raw.githubusercontent.com/mingbowan/sgdeps/master/sgdeps.py

configure

setup your boto credentails.

here's a few options:
     setup environment varialbes: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY
     or create one or some of below files (boto will evaluate in order):
        /etc/boto.cfg
        ~/.boto
        ~/.aws/credentials
     and put your credentials in the file(s) with below format:
       [Credentials]
       aws_access_key_id = <your_access_key_here>
       aws_secret_access_key = <your_secret_key_here>

usage

python sgdeps.py --region <region_name> [--list] [--obsolete | --eni_only] [security_group]

example

$ python sgdeps.py --region us-east-1 mingbotest-A
sg-b4566ad1 (mingbotest-A)
|-- sg-9b566afe (mingbotest-C2)
|-- sg-9f566afa (mingbotest-C1)
|  |-- sg-69576b0c (mingbotest-D2)
|  |  `-- sg-b4566ad1 (mingbotest-A) ** loop
|  `-- sg-64576b01 (mingbotest-D1)
|     `-- sg-9b566afe (mingbotest-C2)
|-- sg-8b566aee (mingbotest-B2)
`-- sg-86566ae3 (mingbotest-B1)

Used by:
  ec2: i-7cf19ebf (Mingbotest-ec2-1)
  ec2: i-7e219ebf (Mingbotest-ec2-1)
  eni: eni-06ae977f