Skip to main content

Interactive visualizations of Terraform dependency graphs

Project description

# Blast Radius

[![PyPI version](https://badge.fury.io/py/BlastRadius.svg)](https://badge.fury.io/py/BlastRadius)

*Blast Radius* is a tool for reasoning about *Terraform* dependency graphs with interactive visualizations. Use *Blast Radius* to:
* **Learn** about *Terraform* or one of its cloud providers, through [example configurations](https://28mm.github.io/blast-radius-docs/).
* **Document** your infrastructure
* **Reason** about relationships between resources, and evaluate changes to them.

<img src="doc/blastradius-interactive.png">

* **Interact** with this diagram (and many others) [here](https://28mm.github.io/blast-radius-docs/).

# Quickstart

Install *Blast Radius* with pip, and *Graphviz* through your system's package manager.

````bash
[...]$ pip3 install BlastRadius
[...]$ brew install graphviz
````

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

```bash
[...]$ blast-radius --serve /path/to/terraform-project
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
```
## Docker
*Alternatively*, you can launch *Blast Radius* in a docker container. (In this example, the current working directory contains a *Terraform* project.)

```bash
[...]$ docker run --cap-add=SYS_ADMIN -it --rm -p 5000:5000 -v $(pwd):/workdir:ro 28mm/blast-radius
```

*Please note*: because terraform saves module links as _absolute_ paths in _.terraform/modules/<uuid>_ we mount the host's filesystem read-only and force terraform to update the modules path at start. This way we don't interfere with the real project. Thus docker has to be run with the `--cap-add=SYS_ADMIN` flag to use the [overlayFS](https://wiki.archlinux.org/index.php/Overlay_filesystem) see [Docker's documentation](https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities).

*Additional note*:
If you organised your terraform directories with stacks and modules, please call *Blast Radius* from the root directory and give the stack's directory as argument (plus the `--serve` argument).

```bash
[...]$ tree -d
/-- project
|-- modules
| |-- foo
| |-- bar
| `-- dead
`-- stacks
`-- beef
`-- .terraform

[...]$ cd project
docker run --cap-add=SYS_ADMIN -it --rm -p 5000:5000 -v $(pwd):/workdir:ro 28mm/blast-radius --serve stacks/beef
```
# Embedded Figures

You may wish to embed figures produced with *Blast Radius* in other documents. You will need the following:

1. an `svg` file and `json` document representing the graph and its layout.
2. `javascript` and `css` found in `.../blastradius/server/static`
3. a uniquely identified DOM element, where the `<svg>` should appear.

Further details available [here](doc/embedded.md).

# Implementation Details

*Blast Radius* uses the [*Graphviz*](http://graphviz.org/) package to layout graph diagrams, [*PyHCL*](https://github.com/virtuald/pyhcl) to parse [*Terraform*](https://www.terraform.io/) configurations, and [*d3.js*](https://d3js.org/) to implement interactive features and animations.

# Further Reading

The development of *Blast Radius* is documented in a series of [blog](https://28mm.github.io) posts:

* [part 1](https://28mm.github.io/notes/d3-terraform-graphs): motivations, d3 force-directed layouts vs. vanilla graphviz.
* [part 2](https://28mm.github.io/notes/d3-terraform-graphs-2): d3-enhanced graphviz layouts, meaningful coloration, animations.
* [part 3](https://28mm.github.io/notes/terraform-graphs-3): limiting horizontal sprawl, supporting modules.
* [part 4](https://28mm.github.io/notes/d3-terraform-graphs-4): search, pan/zoom, prune-to-selection, docker.

A catalog of example *Terraform* configurations, and their dependency graphs can be found [here](https://28mm.github.io/blast-radius-docs/).

* [AWS two-tier architecture](https://28mm.github.io/blast-radius-docs/examples/terraform-provider-aws/two-tier/)
* [AWS networking (featuring modules)](https://28mm.github.io/blast-radius-docs/examples/terraform-provider-aws/networking/)
* [Google two-tier architecture](https://28mm.github.io/blast-radius-docs/examples/terraform-provider-google/two-tier/)
* [Azure load-balancing with 2 vms](https://28mm.github.io/blast-radius-docs/examples/terraform-provider-azurem/2-vms-loadbalancer-lbrules/)

These examples are drawn primarily from the `examples/` directory distributed with various *Terraform* providers, and aren't necessarily ideal. Additional examples, particularly demonstrations of best-practices, or of multi-cloud configurations strongly desired.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

BlastRadius-0.1.12.tar.gz (561.5 kB view hashes)

Uploaded Source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page