Managed Service for Prometheus is enabled when creating the GKE clusters with monitoring_enable_managed_prometheus set to false

TL;DR

The version we are using is beta-private-cluster v31.0.0

Recently, we created several GKE clusters with monitoring_enable_managed_prometheus set to false.

However, the managed prometheus was enabled ignoring the flag monitoring_enable_managed_prometheus

This is the monitoring_config from the terraform state

    monitoring_config {
        enable_components = [
            "SYSTEM_COMPONENTS",
            "HPA",
            "POD",
            "DAEMONSET",
            "DEPLOYMENT",
            "STATEFULSET",
            "STORAGE",
            "CADVISOR",
            "KUBELET",
        ]

        advanced_datapath_observability_config {
            enable_metrics = false
            enable_relay   = false
            relay_mode     = "DISABLED"
        }

        managed_prometheus {
            enabled = true
        }
    }

Expected behavior

The managed prometheus shouldn't be enabled when we set monitoring_enable_managed_prometheus to false

Observed behavior

The managed prometheus is enabled when creating new clusters with monitoring_enable_managed_prometheus to false

Terraform Configuration

module "gke" {
  source = "github.com/terraform-google-modules/terraform-google-kubernetes-engine.git//modules/beta-private-cluster?ref=v31.0.0"
  regional                 = true
  enable_private_nodes     = true
  network_policy           = var.network_policy
  create_service_account   = false
  remove_default_node_pool = true
  node_metadata            = "GKE_METADATA_SERVER"
  # This is to support workload identity
  enable_pod_security_policy = var.enable_pod_security_policy
  project_id                 = var.project_id
  name                       = local.cluster_name
  service_account            = local.gke_service_account
  identity_namespace         = local.identity_namespace
  region                     = var.region
  network                    = var.network
  subnetwork                 = var.subnetwork
  network_project_id         = var.network_project_id
  ip_range_pods              = var.ip_range_pods
  ip_range_services          = var.ip_range_services
  enable_private_endpoint    = var.enable_private_endpoint
  node_pools                 = var.node_pools
  node_pools_labels          = var.node_pools_labels
  node_pools_oauth_scopes    = var.node_pools_oauth_scopes
  node_pools_metadata        = var.node_pools_metadata
  node_pools_taints          = var.node_pools_taints
  node_pools_tags            = local.node_pools_tags
  kubernetes_version         = var.kubernetes_version
  master_ipv4_cidr_block     = var.master_cidr_block
  default_max_pods_per_node  = var.default_max_pods_per_node
  # Whether L4ILB Subsetting is enabled for this cluster.
  enable_l4_ilb_subsetting = var.enable_l4_ilb_subsetting
  # disable external access if we use the master's internal IP as the endpoint of the cluster
  master_authorized_networks          = local.master_authorized_networks
  istio                               = var.enable_istio
  istio_auth                          = "AUTH_MUTUAL_TLS"
  cloudrun                            = var.enable_cloudrun
  release_channel                     = local.release_channel
  maintenance_start_time              = var.maintenance_start_time
  maintenance_end_time                = var.maintenance_end_time
  maintenance_recurrence              = var.maintenance_recurrence
  maintenance_exclusions              = var.maintenance_exclusions
  authenticator_security_group        = var.authenticator_security_group
  logging_service                     = var.logging_service
  logging_enabled_components          = var.logging_enabled_components
  cluster_autoscaling                 = local.cluster_autoscaling
  notification_config_topic           = var.notification_config_topic
  workload_config_audit_mode          = var.workload_config_audit_mode
  network_tags                        = var.auto_provisioning_network_tags
  security_posture_vulnerability_mode = var.security_posture_vulnerability_mode
  security_posture_mode               = var.security_posture_mode
  firewall_priority                    = var.firewall_priority
  firewall_inbound_ports               = var.firewall_inbound_ports
  cluster_resource_labels              = local.cluster_resource_labels
  gce_pd_csi_driver                    = var.gce_pd_csi_driver
  datapath_provider                    = var.datapath_provider
  dns_cache                            = var.dns_cache
  monitoring_enable_managed_prometheus = false
  enable_resource_consumption_export   = var.enable_resource_consumption_export
  resource_usage_export_dataset_id     = var.resource_usage_export_dataset_id
  # set the output endpoint to the master's internal IP
  deploy_using_private_endpoint = var.deploy_using_private_endpoint
  # for workload cost insights
  enable_cost_allocation = var.enable_cost_allocation
  gateway_api_channel    = var.gateway_api_channel
  deletion_protection    = var.deletion_protection
}

Terraform Version

> terraform version
Terraform v1.4.0
on darwin_amd64

Additional information

No response

terraform-google-modules / terraform-google-kubernetes-engine