Current resource resource "mongodbatlas_cluster" "cluster" { project_id = var.project_id name = var.cluster_name disk_size_gb = var.disk_size_gb num_shards = var.num_shards replication_factor = var.replication_factor auto_scaling_disk_gb_enabled = var.auto_scaling_disk_gb_enabled mongo_db_major_version = var.mongo_db_major_version //Provider Settings "block" provider_name = var.provider_name provider_disk_iops = var.provider_disk_iops provider_volume_type = var.provider_volume_type provider_instance_size_name = var.provider_instance_size_name provider_region_name = var.provider_region_name provider_backup_enabled = var.provider_backup_enabled } Suggested resource resource "mongodbatlas_cluster" "cluster" { project_id = var.project_id name = var.cluster_name disk_size_gb = var.disk_size_gb num_shards = var.num_shards replication_factor = var.replication_factor auto_scaling_disk_gb_enabled = var.auto_scaling_disk_gb_enabled mongo_db_major_version = var.mongo_db_major_version //Provider Settings "block" cluster_provider = { name = var.provider_name disk_iops = var.provider_disk_iops volume_type = var.provider_volume_type instance_size_name = var.provider_instance_size_name region_name = var.provider_region_name backup_enabled = var.provider_backup_enabled } } cluster_provider property will be a map of configuration for provider.