CIDR Picker

Checks to see if there's enough space in a VPC for a subnet of a given size. If there is, return it in the form of a CIDR block.

Getting Started

Clone the repository git clone [email protected]:gibbster/cidrpicker.git

Build and test go build go test

Configure the AWS credentials through ~./aws/config, environment variables, or AWS IAM Role (see https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html)

Get help:

./cidrpicker -h                                                                                                                                                                                                      git:master*
Usage of ./cidrpicker:
  -size int
    	Size of CIDR block to find (default 24)
  -vpcid string
    	VPC ID to use

Run the program

./cidrpicker -vpicid vpc-XXXXXXX -size 23
10.0.4.0/23

TODO

• Add more unit tests
• Optimize for efficiency
• Add cloudformation custom resource script (will do this as soon as AWS golang support rolls out)
• Once I learn more about golang standards - do that. This is my first attempt at Go, so I'm sure there's ugly warts to remove

Authors

• David Gibb

License

This project is licensed under the MIT License - see the LICENSE file for details