Blast Radius is a tool for reasoning about Terraform dependency graphs through interactive visualizations. Use Blast Radius to:

  1. Learn about Terraform or one of its cloud providers, through example configurations
  2. Document your infrastructure.
  3. reason about relationships between resources, and evaluate changes to them.

Online Examples

  1. Amazon Web Services
  2. Azure
  3. Digital Ocean
  4. Google
  5. Kubernetes (k8s)
  6. OpenStack

For Instance

Below is a typical (small) Terraform configuration: enough to launch a single web server and elastic load balancer. Use the searchbox or mouse to highlight a resource of interest, and its dependencies. Click again to dismiss the tooltip, and highlight dependents.


Install blastradius with pip, and Graphviz with e.g. Homebrew.

[...]$ pip3 install blastradius [...]$ brew install graphviz

Point Blast Radius at an init-ed Terraform project, and connect with your browser.

[...]$ blast-radius --serve /path/to/terraform-project * Running on (Press CTRL+C to quit)

Further Reading

I've been writing about the development of Blast Radius in a series of blog posts:

Source is hosted on GitHub, as is issue reporting.

About the Author

Patrick McMurchie (email, about) is a Seattle-resident DevOps Engineer and bicycle enthusiast.