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AWS Ruby Update Rules

A simple Ruby script that updates the ip addresses of inbound rules of a specified security group in your Amazon EC2 instance.

Requirements

The only requirement of this script is aws-sdk.

You can install the SDK directly with:

gem install aws-sdk

Basic Configuration

You need to set your AWS security credentials before the script is able to connect to AWS. The AWS SDK for Ruby will automatically read these from the environment:

export AWS_ACCESS_KEY_ID='...'
export AWS_SECRET_ACCESS_KEY='...'
export AWS_REGION='...'

See the Security Credentials page for more information on getting your keys.

Running the script

This sample application connects to Amazon's Elastic Compute Cloud (EC2), finds the security group with the specified name, and updates the ip addresses of inbound rules as you specified. Run it as:

ruby update_rules.rb <security_group_name> <old_source_ip> <new_source_ip>

Screenshots

  • Running the script in command line screenshot 2

  • Before running this script screenshot 1

  • After running this script screenshot 3

Credits

Thanks to awslabs/aws-ruby-sample for getting me started.