Docker Hardening

Overview

The Docker Security Hardening Tool is a professional-grade API for generating CIS Benchmark-compliant Docker security configurations. It automates the creation of hardened Docker deployment manifests, security policies, and configuration files that align with industry-standard security best practices (CIS Benchmark v1.8.0).

This tool is essential for DevOps engineers, security teams, and infrastructure architects who need to rapidly deploy secure Docker environments without manual configuration. It eliminates guesswork by providing validated, benchmark-aligned configurations that can be immediately deployed to production systems.

The API provides intelligent option discovery, flexible configuration generation, and audit-ready output suitable for compliance documentation and security reviews.

Usage

Example Request:

{
  "hardeningOptions": {
    "image_security": ["scan_images", "minimal_base"],
    "runtime_security": ["read_only_root", "no_privileged"],
    "network_security": ["restrict_ports", "user_namespaces"]
  },
  "sessionId": "sess_abc123def456",
  "userId": 12847,
  "timestamp": "2025-01-15T10:30:00Z"
}

Example Response:

{
  "status": "success",
  "configurationId": "config_xyz789",
  "generatedFiles": {
    "Dockerfile.hardened": "FROM alpine:3.18\nRUN addgroup -S appgroup && adduser -S appuser -G appgroup\nUSER appuser\nRUN chmod a-w /\nRUN chmod u+w /tmp /var/tmp\nENTRYPOINT [\"app\"]\n",
    "docker-compose.hardened.yml": "version: '3.8'\nservices:\n  app:\n    image: myapp:hardened\n    read_only: true\n    security_opt:\n      - no-new-privileges:true\n    cap_drop:\n      - ALL\n    cap_add:\n      - NET_BIND_SERVICE\n    networks:\n      - internal\nnetworks:\n  internal:\n    driver: bridge\n",
    "security_policy.json": "{\n  \"version\": \"1.0\",\n  \"benchmark\": \"CIS Docker Benchmark v1.8.0\",\n  \"policies\": [\n    {\"id\": \"4.1\", \"description\": \"Ensure AppArmor Profile is Enabled\", \"status\": \"applied\"},\n    {\"id\": \"4.5\", \"description\": \"Ensure default ulimit is set appropriately\", \"status\": \"applied\"}\n  ]\n}\n"
  },
  "appliedPolicies": [
    "4.1 - AppArmor enabled",
    "4.5 - Ulimit restrictions",
    "5.1 - Read-only root filesystem",
    "5.27 - User namespace enabled"
  ],
  "complianceScore": 94,
  "recommendations": [
    "Consider implementing runtime scanning with Falco for behavioral monitoring",
    "Enable image scanning in your container registry"
  ],
  "timestamp": "2025-01-15T10:30:15Z"
}

Endpoints

GET /

Description: Health check endpoint to verify API availability.

Parameters: None

Response:

200 OK - JSON object confirming service status

POST /api/docker/hardening/generate

Description: Generate Docker security hardening configuration files based on specified options.

Parameters:

| Name | Type | Required | Description | |------|------|----------|-------------| | hardeningOptions | object | Yes | Dictionary mapping security categories to option arrays. Keys represent security domains (e.g., "image_security", "runtime_security"), values are arrays of specific hardening techniques. | | sessionId | string | Yes | Unique session identifier for tracking and audit purposes. | | userId | integer or null | No | Optional user identifier for multi-tenant environments and usage tracking. | | timestamp | string | Yes | ISO 8601 formatted timestamp of the request (e.g., "2025-01-15T10:30:00Z"). |

Response Shape:

{
  "status": "string",
  "configurationId": "string",
  "generatedFiles": {
    "Dockerfile.hardened": "string",
    "docker-compose.hardened.yml": "string",
    "security_policy.json": "string"
  },
  "appliedPolicies": ["string"],
  "complianceScore": "integer (0-100)",
  "recommendations": ["string"],
  "timestamp": "string"
}

GET /api/docker/hardening/options

Description: Retrieve all available hardening options with descriptions, categories, and CIS Benchmark references.

Parameters: None

Response Shape:

{
  "imageSecurityOptions": [
    {
      "id": "string",
      "name": "string",
      "description": "string",
      "cisBenchmarkId": "string"
    }
  ],
  "runtimeSecurityOptions": [...],
  "networkSecurityOptions": [...],
  "storageSecurityOptions": [...],
  "version": "string",
  "lastUpdated": "string"
}

Pricing

| Plan | Calls/Day | Calls/Month | Price | |------|-----------|-------------|-------| | Free | 5 | 50 | Free | | Developer | 20 | 500 | $39/mo | | Professional | 200 | 5,000 | $99/mo | | Enterprise | 100,000 | 1,000,000 | $299/mo |

About

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References

Example Request:

{
  "hardeningOptions": {
    "image_security": ["scan_images", "minimal_base"],
    "runtime_security": ["read_only_root", "no_privileged"],
    "network_security": ["restrict_ports", "user_namespaces"]
  },
  "sessionId": "sess_abc123def456",
  "userId": 12847,
  "timestamp": "2025-01-15T10:30:00Z"
}

Example Response:

{
  "status": "success",
  "configurationId": "config_xyz789",
  "generatedFiles": {
    "Dockerfile.hardened": "FROM alpine:3.18\nRUN addgroup -S appgroup && adduser -S appuser -G appgroup\nUSER appuser\nRUN chmod a-w /\nRUN chmod u+w /tmp /var/tmp\nENTRYPOINT [\"app\"]\n",
    "docker-compose.hardened.yml": "version: '3.8'\nservices:\n  app:\n    image: myapp:hardened\n    read_only: true\n    security_opt:\n      - no-new-privileges:true\n    cap_drop:\n      - ALL\n    cap_add:\n      - NET_BIND_SERVICE\n    networks:\n      - internal\nnetworks:\n  internal:\n    driver: bridge\n",
    "security_policy.json": "{\n  \"version\": \"1.0\",\n  \"benchmark\": \"CIS Docker Benchmark v1.8.0\",\n  \"policies\": [\n    {\"id\": \"4.1\", \"description\": \"Ensure AppArmor Profile is Enabled\", \"status\": \"applied\"},\n    {\"id\": \"4.5\", \"description\": \"Ensure default ulimit is set appropriately\", \"status\": \"applied\"}\n  ]\n}\n"
  },
  "appliedPolicies": [
    "4.1 - AppArmor enabled",
    "4.5 - Ulimit restrictions",
    "5.1 - Read-only root filesystem",
    "5.27 - User namespace enabled"
  ],
  "complianceScore": 94,
  "recommendations": [
    "Consider implementing runtime scanning with Falco for behavioral monitoring",
    "Enable image scanning in your container registry"
  ],
  "timestamp": "2025-01-15T10:30:15Z"
}