rover: A Go repository from Semaphore UI

Rover - Terraform Visualizer

Rover is a Terraform visualizer.

In order to do this, Rover:

generates a plan file and parses the configuration in the root directory or uses a provided plan.
parses the plan and configuration files to generate three items: the resource overview (rso), the resource map (map), and the resource graph (graph).
consumes the rso, map, and graph to generate an interactive configuration and state visualization hosts on 0.0.0.0:9000.

Feedback (via issues) and pull requests are appreciated!

Quickstart

The fastest way to get up and running with Rover is through Docker.

Run the following command in any Terraform workspace to generate a visualization. This command copies all the files in your current directory to the Rover container and exposes port :9000.

$ docker run --rm -it -p 9000:9000 -v $(pwd):/src im2nguyen/rover
2021/07/02 06:46:23 Starting Rover...
2021/07/02 06:46:23 Initializing Terraform...
2021/07/02 06:46:24 Generating plan...
2021/07/02 06:46:25 Parsing configuration...
2021/07/02 06:46:25 Generating resource overview...
2021/07/02 06:46:25 Generating resource map...
2021/07/02 06:46:25 Generating resource graph...
2021/07/02 06:46:25 Done generating assets.
2021/07/02 06:46:25 Rover is running on 0.0.0.0:9000

Once Rover runs on 0.0.0.0:9000, navigate to it to find the visualization!

Run on Terraform plan file

Use -planJSONPath to start Rover on Terraform plan file. The plan.json file should be in Linux version - Unix (LF), UTF-8.

First, generate the plan file in JSON format.

$ terraform plan -out plan.out
$ terraform show -json plan.out > plan.json

Then, run Rover on it.

$ docker run --rm -it -p 9000:9000 -v $(pwd)/plan.json:/src/plan.json im2nguyen/rover:latest -planJSONPath=plan.json

Standalone mode

Standalone mode generates a rover.zip file containing all the static assets.

$ docker run --rm -it -p 9000:9000 -v "$(pwd):/src" im2nguyen/rover -standalone true

After all the assets are generated, unzip rover.zip and open rover/index.html in your favourite web browser.

Set environment variables

Use --env or --env-file to set environment variables in the Docker container. For example, you can save your AWS credentials to a .env file.

$ printenv | grep "AWS" > .env

Then, add it as environment variables to your Docker container with --env-file.

$ docker run --rm -it -p 9000:9000 -v "$(pwd):/src" --env-file ./.env im2nguyen/rover

Define tfbackend, tfvars and Terraform variables

Use -tfBackendConfig to define backend config files and -tfVarsFile or -tfVar to define variables. For example, you can run the following in the example/random-test directory to overload variables.

$ docker run --rm -it -p 9000:9000 -v "$(pwd):/src" im2nguyen/rover -tfBackendConfig test.tfbackend -tfVarsFile test.tfvars -tfVar max_length=4

Image generation

Use -genImage to generate and save the visualization as a SVG image.

$ docker run --rm -it  -v "$(pwd):/src" im2nguyen/rover -genImage true

Installation

You can download Rover binary specific to your system by visiting the Releases page. Download the binary, unzip, then move rover into your PATH.

Build from source

You can build Rover manually by cloning this repository, then building the frontend and compiling the binary. It requires Go v1.21+ and npm.

Build frontend

First, navigate to the ui.

$ cd ui

Then, install the dependencies.

$ npm install

Finally, build the frontend.

$ npm run build

Compile binary

Navigate to the root directory.

$ cd ..

Compile and install the binary. Alternatively, you can use go build and move the binary into your PATH.

$ go install

Build Docker image

First, compile the binary for linux/amd64.

$ env GOOS=linux GOARCH=amd64 go build .

Then, build the Docker image.

$ docker build . -t im2nguyen/rover --no-cache

Basic usage

This repository contains two examples of Terraform configurations in example.

Navigate into random-test example configuration. This directory contains configuration that showcases a wide variety of features common in Terraform (modules, count, output, locals, etc) with the random provider.

$ cd example/random-test

Run Rover. Rover will start running in the current directory and assume the Terraform binary lives in /usr/local/bin/terraform by default.

$ rover
2021/06/23 22:51:27 Starting Rover...
2021/06/23 22:51:27 Initializing Terraform...
2021/06/23 22:51:28 Generating plan...
2021/06/23 22:51:28 Parsing configuration...
2021/06/23 22:51:28 Generating resource overview...
2021/06/23 22:51:28 Generating resource map...
2021/06/23 22:51:28 Generating resource graph...
2021/06/23 22:51:28 Done generating assets.
2021/06/23 22:51:28 Rover is running on 0.0.0.0:9000

You can specify the working directory (where your configuration is living) and the Terraform binary location using flags.

$ rover -workingDir "example/eks-cluster" -tfPath "/Users/dos/terraform"