Resource Destroy Protection + Terraform Collector

✓ Guardrail ↓ Collector Beta Deployment And Infrastructure

Enforce Resource Destroy Protection using data collected by Terraform Collector. Automatically check deployment and infrastructure standards on every PR.

Guardrail: Ensures stateless infrastructure resources (EC2 instances, load balancers, networking) have lifecycle { prevent_destroy = true } to prevent accidental destruction of critical infrastructure.

Data Source: Parse Terraform HCL files to extract configuration data. Writes file validity and full parsed HCL JSON for downstream policy analysis of providers, modules, backends, resources, and infrastructure security posture.

Get Started View on GitHub

How Terraform Collector Powers This Guardrail

The Terraform Collector gathers metadata from your security, orchestration systems. This data flows into Lunar's Component JSON, where the Resource Destroy Protection guardrail evaluates it against your standards.

When enabled, this check runs automatically on every PR and in AI coding workflows, providing real-time enforcement with actionable feedback.

↓ Terraform Collector Gathers Data Collector

Extracts metadata from code, configs, and tool outputs

{ } Component JSON

Data centralized in structured format for evaluation

✓ Resource Destroy Protection Checks Guardrail

Pass/fail result with actionable feedback in PRs

Quick Start Configuration

Add both the collector and policy to your lunar-config.yml to enable this guardrail.

📄 lunar-config.yml

# Step 1: Enable the Terraform Collector
collectors:
  - uses: github://earthly/lunar-lib/collectors/terraform@v1.0.0
    # with: ...

# Step 2: Enable the IaC Guardrails
policies:
  - uses: github://earthly/lunar-lib/policies/iac@v1.0.0
    include: [resource-destroy-protection]
    # with: ...

What Terraform Collector Collects

This collector gathers the following data that the Resource Destroy Protection guardrail evaluates.

Collector code

`terraform`

Parses all Terraform (.tf) files in the repository using hcl2json and collects:

File validity and parse errors (.iac.files[])
Normalized modules with resources and analysis (.iac.modules[])
Full parsed HCL JSON for terraform-specific policy (.iac.native.terraform.files[])
Source tool metadata (.iac.source)

Example Data Flow

Here's an example of the data that Terraform Collector writes to the Component JSON, which Resource Destroy Protection then evaluates.

{ } component.json From Terraform Collector

{
  "iac": {
    "source": {"tool": "hcl2json", "version": "0.6.8"},
    "files": [
      {"path": "deploy/terraform/main.tf", "valid": true},
      {"path": "deploy/terraform/variables.tf", "valid": true}
    ],
    "modules": [
      {
        "path": "deploy/terraform",
        "resources": [
          {"type": "aws_db_instance", "name": "main", "category": "datastore", "has_prevent_destroy": true},
          {"type": "aws_s3_bucket", "name": "logs", "category": "datastore", "has_prevent_destroy": false},
          {"type": "aws_lb", "name": "api", "category": "network", "has_prevent_destroy": false, "internet_facing": true},
          {"type": "aws_instance", "name": "web", "category": "compute", "has_prevent_destroy": false},
          {"type": "aws_wafv2_web_acl", "name": "main", "category": "security"},
          {"type": "aws_wafv2_web_acl_association", "name": "api", "category": "security"}
        ],
        "analysis": {
          "internet_accessible": true,
          "has_waf": true
        }
      }
    ],
    "native": {
      "terraform": {
        "files": [
          {
            "path": "deploy/terraform/main.tf",
            "hcl": {
              "terraform": [{"required_providers": [{"aws": {"source": "hashicorp/aws", "version": "~> 5.0"}}]}],
              "resource": {"aws_db_instance": {"main": [{"engine": "postgres"}]}}
            }
          }
        ]
      }
    }
  }
}

Learn More

Guardrail · IaC Guardrails Resource Destroy Protection View all compatible integrations

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Collector Terraform Collector View full documentation

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