arc

README

ARC - AWS Resource Collector

ARC is a command-line tool for collecting AWS resource information across multiple services and regions, generating organized CSV files and an interactive HTML viewer for easy browsing.

Features

• 🚀 Fast & Concurrent - Parallel collection of resources with configurable concurrency
• 📊 Multiple Output Formats - CSV files and interactive HTML viewer
• 🔍 Comprehensive Coverage - Support for 30+ AWS services: ACM, API Gateway, Batch, CloudFormation, CloudFront, CloudWatch Alarms, CloudWatch Logs, Cognito, DynamoDB, EC2, ECR, ECS, EFS, ElastiCache, ELB, EventBridge, IAM Policy, IAM Role, IAM User/Group, KMS, Lambda, RDS, Redshift, S3, Secrets Manager, SES, SNS, SQS, Step Functions, VPC, WAF.
• 🌏 Multi-Region Support - Collect resources from multiple AWS regions
• 🎯 Selective Collection - Choose specific resource categories to collect
• 📁 Organized Output - Automatically organized by AWS account ID and resource type

Screenshots

Interactive HTML Viewer

ARC generates an interactive HTML viewer that allows you to browse collected resources with ease:

Interactive HTML viewer showing AWS resources organized by service category

The HTML viewer features:

• 📋 Category Panels - Collapsible panels for each AWS service
• 🔍 Search & Filter - Filter categories by name
• 📊 DataTables Integration - Sort, search, and paginate within each table
• 💾 Download Options - Download individual CSV files or the combined CSV
• 🔒 Column Locking - Lock columns for easier horizontal scrolling
• 📱 Responsive Design - Works on desktop and mobile browsers

Table of Contents

• Installation
• Quick Start
• Usage
• Supported AWS Services
• Output Format
• Configuration
• Examples
• Development
• Contributing
• License

Installation

Using Go Install

go install github.com/y-miyazaki/arc/cmd/arc@latest

Using Release tar.gz

You can download a prebuilt release tarball from the project's Releases page and install it quickly. The examples below use the v1.0.6 release; replace v1.0.6 with the version you need.

Available platforms:

• Linux (amd64, arm64)
• macOS (amd64, arm64)
• Windows (amd64)

Linux (AMD64) example:

VERSION=v1.0.6 && curl -L https://github.com/y-miyazaki/arc/releases/download/${VERSION}/arc-linux-amd64.tar.gz | tar -xzf - && sudo mv arc /usr/local/bin/ && sudo chmod +x /usr/local/bin/arc

macOS (ARM64) example:

VERSION=v1.0.6 && curl -L https://github.com/y-miyazaki/arc/releases/download/${VERSION}/arc-darwin-arm64.tar.gz | tar -xzf - && sudo mv arc /usr/local/bin/ && sudo chmod +x /usr/local/bin/arc

Notes:

• The release typically ships a arc-${VERSION}-checksums.txt file; prefer verifying the checksum before installing.
• For Windows, download the .zip asset from the Releases page and extract the arc.exe binary.
• We recommend using the release tarballs for production/distribution. go install is convenient for development but will produce a full-featured build from source.

Verify Installation

arc --version

Quick Start

1. Configure AWS Credentials

# Using AWS CLI
aws configure

# Or set environment variables
export AWS_ACCESS_KEY_ID=your_access_key
export AWS_SECRET_ACCESS_KEY=your_secret_key
export AWS_DEFAULT_REGION=ap-northeast-1

1. Collect All Resources

arc --html

1. View Results

# CSV files will be in ./output/{account-id}/resources/
ls -lh ./output/*/resources/

Serve the HTML locally (recommended)

The generated HTML viewer fetches CSV files over HTTP, so opening index.html with the file:// protocol may fail due to browser restrictions. Start a simple local HTTP server in the output directory and open the viewer over http://.

Python 3 (built-in):

# Serve the whole output directory on port 8000
python3 -m http.server 8000 --directory ./output

# Or serve a specific account folder (replace ACCOUNT_ID)
python3 -m http.server 8000 --directory ./output/ACCOUNT_ID

# Bind to localhost for safety
python3 -m http.server 8000 --bind 127.0.0.1 --directory ./output

# Then open in your browser:
# http://127.0.0.1:8000/ACCOUNT_ID/index.html

Alternatives:

• Node.js: npx http-server ./output -p 8000
• Use your OS bundled web server if preferred. Serving via HTTP resolves fetch/CORS issues when loading CSVs from the HTML viewer.

Usage

Basic Commands

# Collect all resources in default region
arc

# Collect all resources with HTML output
arc --html

# Collect specific categories
arc -c ec2,s3_bucket,lambda

# Collect Step Functions with HTML output
arc -c stepfunctions -H

# Collect from specific region
arc -r us-east-1

# Collect from multiple regions
arc -r ap-northeast-1,us-east-1,eu-west-1

# Use specific AWS profile
arc --profile production

# Set output directory
arc -D /path/to/output

# Enable verbose logging
arc -v

Command-Line Options

OPTIONS:
   --verbose, -v              Enable verbose output
   --region, -r value         AWS region(s) to use (comma-separated) (default: "ap-northeast-1") [$AWS_DEFAULT_REGION]
   --profile value            AWS profile to use [$AWS_PROFILE]
   --output-dir, -D value     Base output directory (default: "./output")
   --categories, -c value     Comma-separated list of categories to collect
   --html, -H                 Generate HTML index (default: false)
   --concurrency, -C value    Maximum number of concurrent AWS API requests (default: 5)
   --help, -h                 show help

Supported AWS Services

Service	Category Name	Description
ACM	acm	Certificate Manager
API Gateway	apigateway	REST and HTTP APIs
Batch	batch	Batch computing
CloudFormation	cloudformation	Infrastructure as Code stacks
CloudFront	cloudfront	Content Delivery Network
CloudWatch Alarms	cloudwatch_alarms	Monitoring alarms
CloudWatch Logs	cloudwatch_logs	Log groups and streams
Cognito Identity	cognito_identity	Identity
Cognito User Pool	cognito_user_pool	User pool
DynamoDB	dynamodb	NoSQL database tables
EC2	ec2	Virtual machines and related resources
ECR	ecr	Container registry
ECS	ecs	Container orchestration
EFS	efs	Elastic File System
ElastiCache	elasticache	In-memory cache
ELB	elb	Load balancers (ALB, NLB, CLB)
EventBridge	eventbridge	Event buses and rules
IAM Policy	iam_policy	Customer-managed IAM Policies
IAM Role	iam_role	IAM Roles with attached policies and last used info
IAM User/Group	iam_user_group	IAM Users and Groups
KMS	kms	Key Management Service
Lambda	lambda	Serverless functions
RDS	rds	Relational databases
Redshift	redshift	Data warehouse
S3 Bucket	s3_bucket	Object storage
Secrets Manager	secretsmanager	Secrets storage
SNS	sns	Simple Notification Service
SES	ses	Simple Email Service (identities, configuration sets, templates)
SQS	sqs	Simple Queue Service
Step Functions	stepfunctions	State machines and activities
VPC	vpc	Virtual Private Cloud and networking
WAF	waf	Web Application Firewall

Output Format

Directory Structure

output/
└── {account-id}/
    ├── index.html          # Interactive HTML viewer
    ├── files.json          # Manifest for HTML viewer
    ├── resources.zip       # all resources csv zip
    └── resources/
        ├── all.csv         # Combined CSV of all resources
        ├── ec2.csv         # EC2-specific resources
        ├── s3_bucket.csv   # S3 Bucket-specific resources
        └── ...             # Other service-specific CSVs

CSV Format

Each CSV file contains:

• Category - Service category (e.g., ec2, s3_bucket)
• SubCategory - Resource type (e.g., Instance, Bucket)
• SubSubCategory - Additional classification
• Name - Resource name
• Region - AWS region
• Service-specific attributes

HTML Viewer

The interactive HTML viewer provides:

• 📋 Search and filter across all resources
• 🔄 Sort by any column
• 📊 Per-category collapsible panels
• 💾 Download CSV files
• 🔒 Fixed column scrolling
• 📱 Responsive design

Configuration

Environment Variables

• AWS_ACCESS_KEY_ID - AWS access key
• AWS_SECRET_ACCESS_KEY - AWS secret key
• AWS_SESSION_TOKEN - AWS session token (for temporary credentials)
• AWS_DEFAULT_REGION - Default AWS region
• AWS_PROFILE - AWS profile name

AWS Permissions

The tool requires read-only permissions for the services you want to collect. Example IAM policy:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "acm:List*",
        "acm:Describe*",
        "apigateway:GET",
        "cloudformation:List*",
        "cloudformation:Describe*",
        "cloudfront:List*",
        "cloudfront:Get*",
        "cloudwatch:Describe*",
        "dynamodb:List*",
        "dynamodb:Describe*",
        "ec2:Describe*",
        "ecr:Describe*",
        "ecs:List*",
        "ecs:Describe*",
        "elasticache:Describe*",
        "elasticloadbalancing:Describe*",
        "events:List*",
        "events:Describe*",
        "iam:List*",
        "iam:Get*",
        "kms:List*",
        "kms:Describe*",
        "lambda:List*",
        "lambda:Get*",
        "rds:Describe*",
        "redshift:Describe*",
        "s3:List*",
        "s3:Get*",
        "secretsmanager:List*",
        "secretsmanager:Describe*",
        "ses:List*",
        "ses:Get*",
        "ses:Describe*",
        "sesv2:List*",
        "sesv2:Get*",
        "sns:List*",
        "sns:Get*",
        "sqs:List*",
        "sqs:Get*",
        "states:List*",
        "states:Describe*",
        "wafv2:List*",
        "wafv2:Get*"
      ],
      "Resource": "*"
    }
  ]
}

Examples

Collect Specific Resources

# Only EC2 instances and S3 buckets
arc -c ec2,s3_bucket

# Only Lambda functions with HTML output
arc -c lambda --html

# Only Step Functions state machines and activities
arc -c stepfunctions -H

# DynamoDB tables in multiple regions
arc -c dynamodb -r ap-northeast-1,us-east-1

Multi-Account Collection

# Collect from production account
arc --profile production -D ./output/production

# Collect from staging account
arc --profile staging -D ./output/staging

# Collect from development account
arc --profile development -D ./output/development

CI/CD Integration

# Example GitHub Actions workflow
# SECURITY NOTE: Using IAM roles (OIDC) is strongly recommended over access keys.
# See: https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/configuring-openid-connect-in-amazon-web-services
name: AWS Resource Inventory
on:
  schedule:
    - cron: '0 0 * * 0'  # Weekly on Sunday

jobs:
  collect:
    runs-on: ubuntu-latest
    # Recommended: Use OIDC with IAM role
    permissions:
      id-token: write
      contents: read
    steps:
      - uses: actions/checkout@v3
      
      - name: Setup Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.25.8'
      
      - name: Install arc
        run: go install github.com/y-miyazaki/arc/cmd/arc@latest
      
      # Recommended: Configure AWS credentials with IAM role (OIDC)
      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v2
        with:
          role-to-assume: arn:aws:iam::123456789012:role/GitHubActionsRole
          aws-region: ap-northeast-1
      
      # Alternative (NOT RECOMMENDED): Using access keys
      # Only use this if IAM roles are not available
      # - name: Configure AWS credentials
      #   uses: aws-actions/configure-aws-credentials@v2
      #   with:
      #     aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
      #     aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
      #     aws-region: ap-northeast-1
      
      - name: Collect resources
        run: arc --html
      
      - name: Upload results
        uses: actions/upload-artifact@v3
        with:
          name: aws-inventory
          path: output/

Development

For development guidelines, building from source, testing, and contributing to the project, please see CONTRIBUTING.md.

License

Apache License 2.0 - see LICENSE for details.

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for detailed guidelines on how to contribute to this project.

Support

• 📖 Documentation
• 🐛 Issue Tracker
• 💬 Discussions