Supported Resources

C3X supports over 1,100 Terraform resource types across AWS, Azure, and Google Cloud. This page lists the major categories and common resource types for each provider.

AWS (~700 Resources)

AWS has the broadest coverage with approximately 700 supported resource types spanning compute, storage, databases, networking, serverless, containers, and more.

Compute

  • aws_instance: EC2 instances (on-demand, reserved, spot)
  • aws_autoscaling_group: Auto Scaling groups
  • aws_ec2_fleet: EC2 Fleet
  • aws_spot_instance_request: Spot instances
  • aws_launch_template: Launch templates

Storage

  • aws_s3_bucket: S3 buckets (Standard, IA, Glacier)
  • aws_s3_bucket_analytics_configuration: S3 analytics
  • aws_s3_bucket_inventory: S3 inventory
  • aws_ebs_volume: EBS volumes (gp3, io2, st1, sc1)
  • aws_ebs_snapshot: EBS snapshots
  • aws_ebs_snapshot_copy: Cross-region snapshot copies
  • aws_efs_file_system: Elastic File System
  • aws_fsx_lustre_file_system: FSx for Lustre
  • aws_fsx_windows_file_system: FSx for Windows
  • aws_backup_vault: AWS Backup

Databases

  • aws_db_instance: RDS instances (MySQL, PostgreSQL, MariaDB, Oracle, SQL Server)
  • aws_rds_cluster: Aurora clusters
  • aws_rds_cluster_instance: Aurora instances
  • aws_dynamodb_table: DynamoDB tables (provisioned and on-demand)
  • aws_elasticache_cluster: ElastiCache (Redis, Memcached)
  • aws_elasticache_replication_group: ElastiCache replication groups
  • aws_redshift_cluster: Redshift clusters
  • aws_neptune_cluster: Neptune graph database
  • aws_docdb_cluster_instance: DocumentDB instances

Serverless

  • aws_lambda_function: Lambda functions
  • aws_lambda_provisioned_concurrency_config: Provisioned concurrency
  • aws_api_gateway_rest_api: API Gateway (REST)
  • aws_apigatewayv2_api: API Gateway (HTTP/WebSocket)
  • aws_sqs_queue: SQS queues
  • aws_sns_topic: SNS topics
  • aws_step_functions_state_machine: Step Functions

Containers

  • aws_eks_cluster: EKS clusters
  • aws_eks_node_group: EKS managed node groups
  • aws_ecs_service: ECS services (Fargate and EC2)
  • aws_ecr_repository: ECR repositories

Networking & CDN

  • aws_lb / aws_alb: Application and Network Load Balancers
  • aws_nat_gateway: NAT gateways
  • aws_cloudfront_distribution: CloudFront distributions
  • aws_vpc_endpoint: VPC endpoints
  • aws_route53_zone: Route 53 hosted zones
  • aws_route53_record: Route 53 DNS records
  • aws_dx_connection: Direct Connect
  • aws_vpn_connection: Site-to-site VPN

Analytics & ML

  • aws_kinesis_stream: Kinesis Data Streams
  • aws_kinesis_firehose_delivery_stream: Kinesis Data Firehose
  • aws_msk_cluster: Managed Streaming for Kafka
  • aws_elasticsearch_domain / aws_opensearch_domain: OpenSearch
  • aws_sagemaker_endpoint_configuration: SageMaker endpoints
  • aws_glue_crawler: Glue crawlers
  • aws_athena_workgroup: Athena workgroups

Monitoring & Management

  • aws_cloudwatch_log_group: CloudWatch Logs
  • aws_cloudwatch_metric_alarm: CloudWatch alarms
  • aws_cloudwatch_dashboard: CloudWatch dashboards
  • aws_config_config_rule: AWS Config rules
  • aws_secretsmanager_secret: Secrets Manager
  • aws_kms_key: KMS keys

Azure (~300 Resources)

Azure coverage includes approximately 300 resource types across compute, databases, storage, networking, and platform services.

Compute

  • azurerm_linux_virtual_machine: Linux VMs
  • azurerm_windows_virtual_machine: Windows VMs
  • azurerm_virtual_machine_scale_set: VM scale sets
  • azurerm_linux_function_app: Linux Function Apps
  • azurerm_windows_function_app: Windows Function Apps
  • azurerm_app_service_plan / azurerm_service_plan: App Service plans
  • azurerm_linux_web_app: Linux Web Apps
  • azurerm_container_app: Container Apps

Databases

  • azurerm_mssql_database: Azure SQL Database
  • azurerm_mssql_elasticpool: SQL elastic pools
  • azurerm_postgresql_flexible_server: PostgreSQL Flexible Server
  • azurerm_mysql_flexible_server: MySQL Flexible Server
  • azurerm_cosmosdb_account: Cosmos DB
  • azurerm_redis_cache: Azure Cache for Redis
  • azurerm_cosmosdb_sql_database: Cosmos DB SQL API

Storage

  • azurerm_storage_account: Storage accounts (Blob, File, Queue, Table)
  • azurerm_managed_disk: Managed disks
  • azurerm_storage_share: Azure File shares
  • azurerm_storage_blob: Blob storage

Containers

  • azurerm_kubernetes_cluster: AKS clusters
  • azurerm_kubernetes_cluster_node_pool: AKS node pools
  • azurerm_container_group: Container Instances
  • azurerm_container_registry: Container Registry

Networking

  • azurerm_lb: Load Balancers
  • azurerm_application_gateway: Application Gateway
  • azurerm_public_ip: Public IP addresses
  • azurerm_cdn_endpoint: CDN endpoints
  • azurerm_frontdoor: Azure Front Door
  • azurerm_dns_zone: DNS zones
  • azurerm_private_dns_zone: Private DNS zones
  • azurerm_nat_gateway: NAT gateways
  • azurerm_vpn_gateway: VPN gateways
  • azurerm_express_route_circuit: ExpressRoute circuits

Analytics & AI

  • azurerm_eventhub_namespace: Event Hubs
  • azurerm_stream_analytics_job: Stream Analytics
  • azurerm_search_service: Cognitive Search
  • azurerm_cognitive_account: Cognitive Services
  • azurerm_machine_learning_compute_cluster: ML compute

Google Cloud (~100 Resources)

Google Cloud coverage includes approximately 100 resource types spanning core infrastructure and platform services.

Compute

  • google_compute_instance: Compute Engine VMs
  • google_compute_instance_group_manager: Managed instance groups
  • google_compute_autoscaler: Autoscaler
  • google_cloud_run_service / google_cloud_run_v2_service: Cloud Run services
  • google_cloudfunctions_function / google_cloudfunctions2_function: Cloud Functions
  • google_app_engine_standard_app_version: App Engine

Databases

  • google_sql_database_instance: Cloud SQL (MySQL, PostgreSQL, SQL Server)
  • google_spanner_instance: Cloud Spanner
  • google_bigtable_instance: Cloud Bigtable
  • google_redis_instance: Memorystore for Redis
  • google_firestore_database: Firestore

Storage

  • google_storage_bucket: Cloud Storage buckets
  • google_compute_disk: Persistent disks
  • google_compute_snapshot: Disk snapshots
  • google_filestore_instance: Filestore

Containers

  • google_container_cluster: GKE clusters
  • google_container_node_pool: GKE node pools
  • google_artifact_registry_repository: Artifact Registry

Networking

  • google_compute_forwarding_rule: Load balancer forwarding rules
  • google_compute_global_forwarding_rule: Global load balancing
  • google_compute_address: Static IP addresses
  • google_compute_router_nat: Cloud NAT
  • google_dns_managed_zone: Cloud DNS
  • google_compute_vpn_tunnel: VPN tunnels
  • google_compute_interconnect_attachment: Dedicated Interconnect

Analytics & BigQuery

  • google_bigquery_dataset: BigQuery datasets
  • google_bigquery_table: BigQuery tables
  • google_bigquery_reservation: BigQuery reservations
  • google_pubsub_topic: Pub/Sub topics
  • google_pubsub_subscription: Pub/Sub subscriptions
  • google_dataflow_job: Dataflow jobs
  • google_logging_project_bucket_config: Cloud Logging
  • google_monitoring_metric_descriptor: Cloud Monitoring

Free Tier Resources

C3X does not account for free tier pricing. Resources that fall within a cloud provider's free tier are still priced at their standard rates. This is a deliberate design decision for several reasons:

  • Free tiers expire. Most cloud providers offer a 12-month free tier for new accounts. Estimating based on free tier pricing would produce inaccurate results once the free period ends.
  • Free tiers vary by account. Different account types, support plans, and enterprise agreements have different free tier allowances. C3X cannot know your specific entitlements.
  • Conservative estimates are safer. It is better to overestimate costs and be pleasantly surprised than to underestimate and exceed your budget.

If a resource is genuinely always-free (such as a VPC or a security group), C3X shows it at $0 or omits it entirely.

Full Resource List

For the complete list of every supported resource type, see the C3X repository.

Missing a resource? Check the GitHub issues to request support for additional resource types.

Next Steps

  • Usage File Format: Define usage parameters for variable-cost resources.
  • CLI Reference: Use --show-skipped to see which resources in your configuration are not yet supported.
  • Quick Start: Run your first cost estimate.