GCP Cloud Registration

This Terraform module provides automated registration and configuration of Google Cloud Platform (GCP) organizations, folders, and projects with CrowdStrike’s Cloud Security Posture Management (CSPM) platform. The module enables keyless authentication through GCP’s Workload Identity Federation and provides security monitoring capabilities including asset inventory and optional real-time log ingestion for threat detection.

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Key Features

• Multi-Scope Registration: Support for organization, folder, and project-level registrations
• Workload Identity Federation: Secure, keyless authentication using GCP’s identity federation
• Asset Inventory: Monitoring of GCP resources for security posture assessment
• Real Time Visibility & Detection (Optional): Real-time log streaming for threat detection

Architecture Overview

The module creates the following GCP resources:

• Workload Identity Pool and Provider for authentication
• IAM role bindings for CrowdStrike service principals across target scopes
• Pub/Sub topics and subscriptions for log ingestion (when RTV&D is enabled)
• Log sinks for audit log streaming (when RTV&D is enabled)

Prerequisites

Before using this module, ensure you have:

1. CrowdStrike Requirements:

   • Falcon Console access with CSPM enabled
   • API credentials with CSPM registration (Read & Write) and Cloud Security Google Cloud Registration (Read & Write) scopes

2. GCP Requirements:

   • GCP project for CrowdStrike infrastructure resources
   • Appropriate IAM permissions for the deployment service account
   • Required GCP APIs enabled

Usage

terraform {
  required_version = ">= 1.5.0"

  required_providers {
    google = {
      source  = "hashicorp/google"
      version = ">= 6.22"
    }
  }
}

provider "google" {
  project = "your-csmp-infrastructure-project"
}

module "crowdstrike_gcp_registration" {
  source = "CrowdStrike/terraform-google-cloud-registration"
  falcon_client_id     = "<Falcon API client ID>"
  falcon_client_secret = "<Falcon API client secret>"

  # GCP Infrastructure Project
  infra_project_id = "your-csmp-infrastructure-project"

  # Registration Scope - Organization Level
  registration_type = "organization"
  organization_id   = "123456789012"

  # CrowdStrike Role ARN
  role_arn = "arn:aws:sts::111111111111:assumed-role/CrowdStrikeConnectorRoleName"

  # Optional: Enable Real Time Visibility & Detection
  enable_realtime_visibility = true

  # Optional: Log Ingestion Configuration
  log_ingestion_settings = {
    message_retention_duration       = "1209600s"  # 14 days
    ack_deadline_seconds             = 300         # 5 minutes
    topic_message_retention_duration = "2592000s"  # 30 days
    audit_log_types                  = ["activity", "system_event", "policy"]
    exclusion_filters = [
      "resource.labels.environment=\"test\"",
      "resource.labels.temporary=\"true\""
    ]
  }

  # Optional: Resource Naming
  resource_prefix = "cs-"
  resource_suffix = "-prod"

  # Optional: Resource Labels
  labels = {
    environment = "production"
    project     = "crowdstrike-integration"
    cstagvendor = "crowdstrike"
  }
}

Providers

Name	Version
crowdstrike	>= 0.0.55
google	>= 6.22

Resources

Name	Type
crowdstrike_cloud_google_registration.main	resource
crowdstrike_cloud_google_registration_settings.main	resource
google_project.wif_project	data source

Inputs

Name	Description	Type	Default	Required
deployment_method	Deployment method for the CrowdStrike GCP registration	string	"terraform-native"	no
enable_realtime_visibility	Enable Real Time Visibility and Detection (RTV&D) features via log ingestion	bool	false	no
excluded_project_patterns	List of shell-style patterns to exclude specific projects from CSPM registration. Supports wildcards (* and ?). Projects matching these patterns will be excluded from asset inventory and log ingestion. Examples: ‘sys-*’, ‘dev-?’.	list(string)	[]	no
folder_ids	List of Google Cloud folders being registered	list(string)	[]	no
infra_project_id	Google Cloud Project ID where CrowdStrike infrastructure resources will be deployed	string	n/a	yes
infrastructure_manager_region	The Google Cloud region for Infrastructure Manager. Required when deployment_method is infrastructure-manager	string	null	no
labels	Map of labels to be applied to all resources created by this module	map(string)	{}	no
log_ingestion_settings	Configuration settings for log ingestion. Controls Pub/Sub topic and subscription settings, audit log types, schema validation, and allows using existing resources.	object({ message_retention_duration = optional(string, “604800s”) ack_deadline_seconds = optional(number, 600) topic_message_retention_duration = optional(string, “604800s”) audit_log_types = optional(list(string), [“activity”, “system_event”, “policy”]) topic_storage_regions = optional(list(string), []) enable_schema_validation = optional(bool, false) schema_type = optional(string, “AVRO”) schema_definition = optional(string) existing_topic_name = optional(string) existing_subscription_name = optional(string) exclusion_filters = optional(list(string), []) })	{}	no
organization_id	GCP Organization ID for organization-level registration	string	null	no
project_ids	List of Google Cloud projects being registered	list(string)	[]	no
registration_name	Name for the CrowdStrike GCP registration	string	n/a	yes
registration_type	Type of registration: organization, folder, or project	string	n/a	yes
resource_prefix	Prefix to be added to all created resource names for identification	string	null	no
resource_suffix	Suffix to be added to all created resource names for identification	string	null	no
role_arn	AWS Role ARN used by CrowdStrike for authentication	string	n/a	yes
wif_project_id	Google Cloud Project ID where the CrowdStrike workload identity federation pool resources are deployed. Defaults to infra_project_id if not specified	string	null	no

Outputs

Name	Description
log_sink_names	Names of the created log sinks (if RTV&D enabled)
log_subscription_id	The ID of the Pub/Sub subscription for log ingestion (if RTV&D enabled)
log_topic_id	The ID of the Pub/Sub topic for log ingestion (if RTV&D enabled)
registration_id	The unique CrowdStrike registration ID for this GCP setup
wif_iam_principal	The IAM principal that CrowdStrike uses to access GCP resources
wif_pool_id	The ID of the created Workload Identity Pool
wif_pool_provider_id	The ID of the created Workload Identity Pool Provider
wif_project_id	The GCP Project ID where Workload Identity resources were created
wif_project_number	The GCP Project Number for the Workload Identity project