mbainter / regula-action

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regula-action

Regula is a tool that evaluates CloudFormation and Terraform infrastructure-as-code for potential AWS, Azure, and Google Cloud security misconfigurations and compliance violations prior to deployment. This is a GitHub Action to run Regula against your repository.

Example

Here's an example workflow file. It checks three different IaC configurations: one Terraform directory and two CloudFormation templates:

on: [push]

jobs:
  regula_tf_job:
    runs-on: ubuntu-latest
    name: Regula Terraform
    steps:
    - uses: actions/checkout@master
    - uses: fugue/regula-action@v2.5.0
      with:
        input_path: infra_tf
        include: example_custom_rule

  regula_cfn_job:
    runs-on: ubuntu-latest
    name: Regula CloudFormation
    steps:
    - uses: actions/checkout@master
    - uses: fugue/regula-action@v2.5.0
      with:
        input_path: infra_cfn/cloudformation.yaml

  regula_valid_cfn_job:
    runs-on: ubuntu-latest
    name: Regula Valid CloudFormation
    steps:
    - uses: actions/checkout@master
    - uses: fugue/regula-action@v2.5.0
      with:
        input_path: infra_valid_cfn/cloudformation.yaml

  regula_multi_cfn_job:
    runs-on: ubuntu-latest
    name: Regula multiple CloudFormation templates
    steps:
    - uses: actions/checkout@master
    - uses: fugue/regula-action@v2.5.0
      with:
        input_path: '*/cloudformation.yaml'

  regula_input_list_job:
    runs-on: ubuntu-latest
    name: Regula on CloudFormation and Terraform
    steps:
    - uses: actions/checkout@master
    - uses: fugue/regula-action@v2.5.0
      with:
        input_path: |
          infra_cfn/cloudformation.yaml
          infra_valid_cfn/cloudformation.yaml
          infra_tf

  regula_tf_plan_job:
    runs-on: ubuntu-latest
    name: Regula on a Terraform plan JSON
    steps:
    - uses: actions/checkout@master
    - uses: hashicorp/setup-terraform@v1
      with:
        # See the note below for why this option is necessary.
        terraform_wrapper: false
        terraform_version: 1.0.8
    - run: |
        cd infra_tf
        terraform init
        terraform plan -refresh=false -out="plan.tfplan"
        terraform show -json plan.tfplan > plan.json
      env:
        AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
    - uses: fugue/regula-action@v2.5.0
      with:
        input_path: infra_tf/plan.json
        input_type: tf-plan
        include: example_custom_rule

You can see this example in action in the regula-ci-example.

Inputs

  • input_path: One or more Terraform directories, Terraform JSON plans, or CloudFormation templates. Accepts space-separated or newline-separated filenames and/or globbing expressions. This defaults to . (the root of your repository).
  • config: Path to .regula.yaml file. By default regula will look in the current working directory and its parents.
  • environment_id: Environment ID in Fugue.
  • exclude: Rule IDs or names to exclude. This can be a space or newline-separated list.
  • include: Custom rule and configuration paths passed in to the Regula interpreter. This can be a space or newline-separated list.
  • input_type: The input types that Regula will evaluate. Defaults to auto, which evaluates all supported types. Possible values are:
    • auto
    • tf-plan -- Terraform plan JSON files
    • cfn -- CloudFormation templates in YAML/JSON
    • tf -- Terraform directories or files
    • k8s -- Kubernetes manifest in YAML format
  • no_built_ins: Disable the built-in Regula rules. Set to "true" if you only want to run custom rules.
  • no_config: Do not look for or load a regula config file. Set to "true" to enable this option.
  • no_ignore: Disable use of .gitignore. Set to "true" to enable this option.
  • only: Rule IDs or names to run. All other rules will be excluded. This can be a space or newline-separated list.
  • severity: The minimum severity where Regula will produce a non-zero exit code for failing rules. Defaults to unknown. Use off to always produce a zero exit code. Possible values are:
    • unknown
    • informational
    • low
    • medium
    • high
    • critical
    • off
  • sync: Fetch rules and configuration from Fugue. Set to "true" to enable this option.
  • upload: Upload results to Fugue. Set to "true" to enable this. Requires sync to be set as well.
  • rego_paths: Custom rule and configuration paths passed in to the Regula interpreter
  • user_only: Disable the builtin Regula rules. Set to true if you only want to run custom rules.

Integration with Fugue

You can easily integrate this action with Fugue.

  1. Set sync and upload to true in the input values:

    - uses: fugue/regula-action@v2.5.0
      with:
        sync: "true"
        upload: "true"

    Note that setting upload will require you to set an environment ID as well. You can either specify that in the .regula.yaml or pass it in as an input value.

  2. Set up FUGUE_API_ID and FUGUE_API_SECRET environment variables for the action.

    You can find more info about these in the Fugue API Documentation.

Deprecated options

These options still function, but we encourage you to update your configurations before they are removed in a future release.

  • user_only is deprecated. Use no_built_ins instead.
  • rego_paths is deprecated. Use include instead.
  • terraform_directory is deprecated. Use input_path instead.

Links to additional information

How to use this GitHub Action

To use Regula to evaluate the infrastructure-as-code in your own repository via GitHub Actions, see the instructions in regula-ci-example. The example walks through how to use this GitHub Action in your own repo.

Compatibility with the hashicorp/setup-terraform action

The hashicorp/setup-terraform action can be used to generate a Terraform plan JSON file that Regula can evaluate. By default, the hashicorp/setup-terraform action wraps the terraform binary with a script that outputs some additional information for each command it executes. It's necessary to use the terraform_wrapper: false option, as we're doing in the example above, in order for the plan JSON file to be valid.

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