variables.tf

variable "project_id" {
  type        = string
  description = "The project ID to host the cluster in (required)"
}

variable "name" {
  type        = string
  description = "The name of the cluster (required)"
}

variable "description" {
  type        = string
  description = "The description of the cluster"
  default     = ""
}

variable "regional" {
  type        = bool
  description = "Whether is a regional cluster (zonal cluster if set false. WARNING: changing this after cluster creation is destructive!)"
  default     = true
}

variable "region" {
  type        = string
  description = "The region to host the cluster in (optional if zonal cluster / required if regional)"
  default     = null
}

variable "zones" {
  type        = list(string)
  description = "The zones to host the cluster in (optional if regional cluster / required if zonal)"
  default     = []
}

variable "network" {
  type        = string
  description = "The VPC network to host the cluster in (required)"
}

variable "network_project_id" {
  type        = string
  description = "The project ID of the shared VPC's host (for shared vpc support)"
  default     = ""
}

variable "subnetwork" {
  type        = string
  description = "The subnetwork to host the cluster in (required)"
}

variable "kubernetes_version" {
  type        = string
  description = "The Kubernetes version of the masters. If set to 'latest' it will pull latest available version in the selected region."
  default     = "latest"
}

variable "master_authorized_networks" {
  type        = list(object({ cidr_block = string, display_name = string }))
  description = "List of master authorized networks. If none are provided, disallow external access (except the cluster node IPs, which GKE automatically whitelists)."
  default     = []
}

variable "enable_vertical_pod_autoscaling" {
  type        = bool
  description = "Vertical Pod Autoscaling automatically adjusts the resources of pods controlled by it"
  default     = false
}

variable "horizontal_pod_autoscaling" {
  type        = bool
  description = "Enable horizontal pod autoscaling addon"
  default     = true
}

variable "http_load_balancing" {
  type        = bool
  description = "Enable httpload balancer addon"
  default     = true
}

variable "service_external_ips" {
  type        = bool
  description = "Whether external ips specified by a service will be allowed in this cluster"
  default     = false
}

variable "datapath_provider" {
  type        = string
  description = "The desired datapath provider for this cluster. By default, `DATAPATH_PROVIDER_UNSPECIFIED` enables the IPTables-based kube-proxy implementation. `ADVANCED_DATAPATH` enables Dataplane-V2 feature."
  default     = "DATAPATH_PROVIDER_UNSPECIFIED"
}

variable "maintenance_start_time" {
  type        = string
  description = "Time window specified for daily or recurring maintenance operations in RFC3339 format"
  default     = "05:00"
}

variable "maintenance_exclusions" {
  type        = list(object({ name = string, start_time = string, end_time = string, exclusion_scope = string }))
  description = "List of maintenance exclusions. A cluster can have up to three"
  default     = []
}

variable "maintenance_end_time" {
  type        = string
  description = "Time window specified for recurring maintenance operations in RFC3339 format"
  default     = ""
}

variable "maintenance_recurrence" {
  type        = string
  description = "Frequency of the recurring maintenance window in RFC5545 format."
  default     = ""
}

variable "ip_range_pods" {
  type        = string
  description = "The _name_ of the secondary subnet ip range to use for pods"
}

variable "additional_ip_range_pods" {
  type        = list(string)
  description = "List of _names_ of the additional secondary subnet ip ranges to use for pods"
  default     = []
}

variable "ip_range_services" {
  type        = string
  description = "The _name_ of the secondary subnet range to use for services"
}

variable "stack_type" {
  type        = string
  description = "The stack type to use for this cluster. Either `IPV4` or `IPV4_IPV6`. Defaults to `IPV4`."
  default     = "IPV4"
}

variable "node_pools" {
  type        = list(map(any))
  description = "List of maps containing node pools"

  default = [
    {
      name = "default-node-pool"
    },
  ]
}

variable "windows_node_pools" {
  type        = list(map(string))
  description = "List of maps containing Windows node pools"
  default     = []
}

variable "node_pools_labels" {
  type        = map(map(string))
  description = "Map of maps containing node labels by node-pool name"

  # Default is being set in variables_defaults.tf
  default = {
    all               = {}
    default-node-pool = {}
  }
}

variable "node_pools_resource_labels" {
  type        = map(map(string))
  description = "Map of maps containing resource labels by node-pool name"

  default = {
    all               = {}
    default-node-pool = {}
  }
}

variable "node_pools_metadata" {
  type        = map(map(string))
  description = "Map of maps containing node metadata by node-pool name"

  # Default is being set in variables_defaults.tf
  default = {
    all               = {}
    default-node-pool = {}
  }
}

variable "node_pools_linux_node_configs_sysctls" {
  type        = map(map(string))
  description = "Map of maps containing linux node config sysctls by node-pool name"

  # Default is being set in variables_defaults.tf
  default = {
    all               = {}
    default-node-pool = {}
  }
}

variable "enable_cost_allocation" {
  type        = bool
  description = "Enables Cost Allocation Feature and the cluster name and namespace of your GKE workloads appear in the labels field of the billing export to BigQuery"
  default     = false
}
variable "resource_usage_export_dataset_id" {
  type        = string
  description = "The ID of a BigQuery Dataset for using BigQuery as the destination of resource usage export."
  default     = ""
}

variable "enable_network_egress_export" {
  type        = bool
  description = "Whether to enable network egress metering for this cluster. If enabled, a daemonset will be created in the cluster to meter network egress traffic."
  default     = false
}

variable "enable_resource_consumption_export" {
  type        = bool
  description = "Whether to enable resource consumption metering on this cluster. When enabled, a table will be created in the resource export BigQuery dataset to store resource consumption data. The resulting table can be joined with the resource usage table or with BigQuery billing export."
  default     = true
}

variable "cluster_autoscaling" {
  type = object({
    enabled             = bool
    autoscaling_profile = string
    min_cpu_cores       = number
    max_cpu_cores       = number
    min_memory_gb       = number
    max_memory_gb       = number
    gpu_resources       = list(object({ resource_type = string, minimum = number, maximum = number }))
    auto_repair         = bool
    auto_upgrade        = bool
    disk_size           = optional(number)
    disk_type           = optional(string)
  })
  default = {
    enabled             = false
    autoscaling_profile = "BALANCED"
    max_cpu_cores       = 0
    min_cpu_cores       = 0
    max_memory_gb       = 0
    min_memory_gb       = 0
    gpu_resources       = []
    auto_repair         = true
    auto_upgrade        = true
    disk_size           = 100
    disk_type           = "pd-standard"
  }
  description = "Cluster autoscaling configuration. See [more details](https://cloud.google.com/kubernetes-engine/docs/reference/rest/v1beta1/projects.locations.clusters#clusterautoscaling)"
}

variable "node_pools_taints" {
  type        = map(list(object({ key = string, value = string, effect = string })))
  description = "Map of lists containing node taints by node-pool name"

  # Default is being set in variables_defaults.tf
  default = {
    all               = []
    default-node-pool = []
  }
}

variable "node_pools_tags" {
  type        = map(list(string))
  description = "Map of lists containing node network tags by node-pool name"

  # Default is being set in variables_defaults.tf
  default = {
    all               = []
    default-node-pool = []
  }
}

variable "node_pools_oauth_scopes" {
  type        = map(list(string))
  description = "Map of lists containing node oauth scopes by node-pool name"

  # Default is being set in variables_defaults.tf
  default = {
    all               = ["https://www.googleapis.com/auth/cloud-platform"]
    default-node-pool = []
  }
}

variable "network_tags" {
  description = "(Optional) - List of network tags applied to auto-provisioned node pools."
  type        = list(string)
  default     = []
}

variable "stub_domains" {
  type        = map(list(string))
  description = "Map of stub domains and their resolvers to forward DNS queries for a certain domain to an external DNS server"
  default     = {}
}

variable "upstream_nameservers" {
  type        = list(string)
  description = "If specified, the values replace the nameservers taken by default from the node’s /etc/resolv.conf"
  default     = []
}

variable "non_masquerade_cidrs" {
  type        = list(string)
  description = "List of strings in CIDR notation that specify the IP address ranges that do not use IP masquerading."
  default     = ["10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"]
}

variable "ip_masq_resync_interval" {
  type        = string
  description = "The interval at which the agent attempts to sync its ConfigMap file from the disk."
  default     = "60s"
}

variable "ip_masq_link_local" {
  type        = bool
  description = "Whether to masquerade traffic to the link-local prefix (169.254.0.0/16)."
  default     = false
}

variable "configure_ip_masq" {
  type        = bool
  description = "Enables the installation of ip masquerading, which is usually no longer required when using aliasied IP addresses. IP masquerading uses a kubectl call, so when you have a private cluster, you will need access to the API server."
  default     = false
}

variable "cluster_telemetry_type" {
  type        = string
  description = "Available options include ENABLED, DISABLED, and SYSTEM_ONLY"
  default     = null
}

variable "logging_service" {
  type        = string
  description = "The logging service that the cluster should write logs to. Available options include logging.googleapis.com, logging.googleapis.com/kubernetes (beta), and none"
  default     = "logging.googleapis.com/kubernetes"
}

variable "monitoring_service" {
  type        = string
  description = "The monitoring service that the cluster should write metrics to. Automatically send metrics from pods in the cluster to the Google Cloud Monitoring API. VM metrics will be collected by Google Compute Engine regardless of this setting Available options include monitoring.googleapis.com, monitoring.googleapis.com/kubernetes (beta) and none"
  default     = "monitoring.googleapis.com/kubernetes"
}

variable "create_service_account" {
  type        = bool
  description = "Defines if service account specified to run nodes should be created."
  default     = true
}

variable "grant_registry_access" {
  type        = bool
  description = "Grants created cluster-specific service account storage.objectViewer and artifactregistry.reader roles."
  default     = false
}

variable "registry_project_ids" {
  type        = list(string)
  description = "Projects holding Google Container Registries. If empty, we use the cluster project. If a service account is created and the `grant_registry_access` variable is set to `true`, the `storage.objectViewer` and `artifactregsitry.reader` roles are assigned on these projects."
  default     = []
}

variable "service_account" {
  type        = string
  description = "The service account to run nodes as if not overridden in `node_pools`. The create_service_account variable default value (true) will cause a cluster-specific service account to be created. This service account should already exists and it will be used by the node pools. If you wish to only override the service account name, you can use service_account_name variable."
  default     = ""
}

variable "service_account_name" {
  type        = string
  description = "The name of the service account that will be created if create_service_account is true. If you wish to use an existing service account, use service_account variable."
  default     = ""
}

variable "issue_client_certificate" {
  type        = bool
  description = "Issues a client certificate to authenticate to the cluster endpoint. To maximize the security of your cluster, leave this option disabled. Client certificates don't automatically rotate and aren't easily revocable. WARNING: changing this after cluster creation is destructive!"
  default     = false
}

variable "cluster_ipv4_cidr" {
  type        = string
  default     = null
  description = "The IP address range of the kubernetes pods in this cluster. Default is an automatically assigned CIDR."
}

variable "cluster_resource_labels" {
  type        = map(string)
  description = "The GCE resource labels (a map of key/value pairs) to be applied to the cluster"
  default     = {}
}


variable "deploy_using_private_endpoint" {
  type        = bool
  description = "(Beta) A toggle for Terraform and kubectl to connect to the master's internal IP address during deployment."
  default     = false
}

variable "enable_private_endpoint" {
  type        = bool
  description = "(Beta) Whether the master's internal IP address is used as the cluster endpoint"
  default     = false
}

variable "enable_private_nodes" {
  type        = bool
  description = "(Beta) Whether nodes have internal IP addresses only"
  default     = false
}

variable "master_ipv4_cidr_block" {
  type        = string
  description = "(Beta) The IP range in CIDR notation to use for the hosted master network. Optional for Autopilot clusters."
  default     = "10.0.0.0/28"
}

variable "master_global_access_enabled" {
  type        = bool
  description = "Whether the cluster master is accessible globally (from any region) or only within the same region as the private endpoint."
  default     = true
}

variable "dns_cache" {
  type        = bool
  description = "The status of the NodeLocal DNSCache addon."
  default     = false
}

variable "authenticator_security_group" {
  type        = string
  description = "The name of the RBAC security group for use with Google security groups in Kubernetes RBAC. Group name must be in format gke-security-groups@yourdomain.com"
  default     = null
}

variable "identity_namespace" {
  description = "The workload pool to attach all Kubernetes service accounts to. (Default value of `enabled` automatically sets project-based pool `[project_id].svc.id.goog`)"
  type        = string
  default     = "enabled"
}

variable "enable_mesh_certificates" {
  type        = bool
  default     = false
  description = "Controls the issuance of workload mTLS certificates. When enabled the GKE Workload Identity Certificates controller and node agent will be deployed in the cluster. Requires Workload Identity."
}

variable "release_channel" {
  type        = string
  description = "The release channel of this cluster. Accepted values are `UNSPECIFIED`, `RAPID`, `REGULAR` and `STABLE`. Defaults to `REGULAR`."
  default     = "REGULAR"
}

variable "gateway_api_channel" {
  type        = string
  description = "The gateway api channel of this cluster. Accepted values are `CHANNEL_STANDARD` and `CHANNEL_DISABLED`."
  default     = null
}

variable "add_cluster_firewall_rules" {
  type        = bool
  description = "Create additional firewall rules"
  default     = false
}

variable "add_master_webhook_firewall_rules" {
  type        = bool
  description = "Create master_webhook firewall rules for ports defined in `firewall_inbound_ports`"
  default     = false
}

variable "firewall_priority" {
  type        = number
  description = "Priority rule for firewall rules"
  default     = 1000
}

variable "firewall_inbound_ports" {
  type        = list(string)
  description = "List of TCP ports for admission/webhook controllers. Either flag `add_master_webhook_firewall_rules` or `add_cluster_firewall_rules` (also adds egress rules) must be set to `true` for inbound-ports firewall rules to be applied."
  default     = ["8443", "9443", "15017"]
}

variable "add_shadow_firewall_rules" {
  type        = bool
  description = "Create GKE shadow firewall (the same as default firewall rules with firewall logs enabled)."
  default     = false
}

variable "shadow_firewall_rules_priority" {
  type        = number
  description = "The firewall priority of GKE shadow firewall rules. The priority should be less than default firewall, which is 1000."
  default     = 999
  validation {
    condition     = var.shadow_firewall_rules_priority < 1000
    error_message = "The shadow firewall rule priority must be lower than auto-created one(1000)."
  }
}

variable "shadow_firewall_rules_log_config" {
  type = object({
    metadata = string
  })
  description = "The log_config for shadow firewall rules. You can set this variable to `null` to disable logging."
  default = {
    metadata = "INCLUDE_ALL_METADATA"
  }
}

variable "enable_confidential_nodes" {
  type        = bool
  description = "An optional flag to enable confidential node config."
  default     = false
}

variable "workload_vulnerability_mode" {
  description = "(beta) Vulnerability mode."
  type        = string
  default     = ""
}

variable "workload_config_audit_mode" {
  description = "(beta) Workload config audit mode."
  type        = string
  default     = "DISABLED"
}

variable "enable_fqdn_network_policy" {
  type        = bool
  description = "Enable FQDN Network Policies on the cluster"
  default     = null
}

variable "security_posture_mode" {
  description = "Security posture mode.  Accepted values are `DISABLED` and `BASIC`. Defaults to `DISABLED`."
  type        = string
  default     = "DISABLED"
}

variable "security_posture_vulnerability_mode" {
  description = "Security posture vulnerability mode.  Accepted values are `VULNERABILITY_DISABLED` and `VULNERABILITY_BASIC`. Defaults to `VULNERABILITY_DISABLED`."
  type        = string
  default     = "VULNERABILITY_DISABLED"
}

variable "disable_default_snat" {
  type        = bool
  description = "Whether to disable the default SNAT to support the private use of public IP addresses"
  default     = false
}

variable "notification_config_topic" {
  type        = string
  description = "The desired Pub/Sub topic to which notifications will be sent by GKE. Format is projects/{project}/topics/{topic}."
  default     = ""
}

variable "deletion_protection" {
  type        = bool
  description = "Whether or not to allow Terraform to destroy the cluster."
  default     = true
}

variable "enable_tpu" {
  type        = bool
  description = "Enable Cloud TPU resources in the cluster. WARNING: changing this after cluster creation is destructive!"
  default     = false
}

variable "network_policy" {
  type        = bool
  description = "Enable network policy addon"
  default     = false
}

variable "network_policy_provider" {
  type        = string
  description = "The network policy provider."
  default     = "CALICO"
}

variable "initial_node_count" {
  type        = number
  description = "The number of nodes to create in this cluster's default node pool."
  default     = 0
}

variable "remove_default_node_pool" {
  type        = bool
  description = "Remove default node pool while setting up the cluster"
  default     = false
}

variable "filestore_csi_driver" {
  type        = bool
  description = "The status of the Filestore CSI driver addon, which allows the usage of filestore instance as volumes"
  default     = false
}

variable "disable_legacy_metadata_endpoints" {
  type        = bool
  description = "Disable the /0.1/ and /v1beta1/ metadata server endpoints on the node. Changing this value will cause all node pools to be recreated."
  default     = true
}

variable "default_max_pods_per_node" {
  type        = number
  description = "The maximum number of pods to schedule per node"
  default     = 110
}

variable "database_encryption" {
  description = "Application-layer Secrets Encryption settings. The object format is {state = string, key_name = string}. Valid values of state are: \"ENCRYPTED\"; \"DECRYPTED\". key_name is the name of a CloudKMS key."
  type        = list(object({ state = string, key_name = string }))

  default = [{
    state    = "DECRYPTED"
    key_name = ""
  }]
}

variable "enable_shielded_nodes" {
  type        = bool
  description = "Enable Shielded Nodes features on all nodes in this cluster"
  default     = true
}

variable "enable_binary_authorization" {
  type        = bool
  description = "Enable BinAuthZ Admission controller"
  default     = false
}

variable "node_metadata" {
  description = "Specifies how node metadata is exposed to the workload running on the node"
  default     = "GKE_METADATA"
  type        = string

  validation {
    condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
  }
}

variable "cluster_dns_provider" {
  type        = string
  description = "Which in-cluster DNS provider should be used. PROVIDER_UNSPECIFIED (default) or PLATFORM_DEFAULT or CLOUD_DNS."
  default     = "PROVIDER_UNSPECIFIED"
}

variable "cluster_dns_scope" {
  type        = string
  description = "The scope of access to cluster DNS records. DNS_SCOPE_UNSPECIFIED (default) or CLUSTER_SCOPE or VPC_SCOPE. "
  default     = "DNS_SCOPE_UNSPECIFIED"
}

variable "cluster_dns_domain" {
  type        = string
  description = "The suffix used for all cluster service records."
  default     = ""
}

variable "gce_pd_csi_driver" {
  type        = bool
  description = "Whether this cluster should enable the Google Compute Engine Persistent Disk Container Storage Interface (CSI) Driver."
  default     = true
}

variable "gke_backup_agent_config" {
  type        = bool
  description = "Whether Backup for GKE agent is enabled for this cluster."
  default     = false
}

variable "gcs_fuse_csi_driver" {
  type        = bool
  description = "Whether GCE FUSE CSI driver is enabled for this cluster."
  default     = false
}

variable "timeouts" {
  type        = map(string)
  description = "Timeout for cluster operations."
  default     = {}
  validation {
    condition     = !contains([for t in keys(var.timeouts) : contains(["create", "update", "delete"], t)], false)
    error_message = "Only create, update, delete timeouts can be specified."
  }
}

variable "monitoring_enable_managed_prometheus" {
  type        = bool
  description = "Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled."
  default     = false
}

variable "monitoring_enable_observability_metrics" {
  type        = bool
  description = "Whether or not the advanced datapath metrics are enabled."
  default     = false
}

variable "monitoring_observability_metrics_relay_mode" {
  type        = string
  description = "Mode used to make advanced datapath metrics relay available."
  default     = null
  validation {
    condition     = var.monitoring_observability_metrics_relay_mode == null ? true : contains(["DISABLED", "INTERNAL_VPC_LB", "EXTERNAL_LB"], var.monitoring_observability_metrics_relay_mode)
    error_message = "The advanced datapath metrics relay value must be one of DISABLED, INTERNAL_VPC_LB, EXTERNAL_LB."
  }
}

variable "monitoring_enabled_components" {
  type        = list(string)
  description = "List of services to monitor: SYSTEM_COMPONENTS, WORKLOADS. Empty list is default GKE configuration."
  default     = []
}

variable "logging_enabled_components" {
  type        = list(string)
  description = "List of services to monitor: SYSTEM_COMPONENTS, WORKLOADS. Empty list is default GKE configuration."
  default     = []
}

variable "enable_kubernetes_alpha" {
  type        = bool
  description = "Whether to enable Kubernetes Alpha features for this cluster. Note that when this option is enabled, the cluster cannot be upgraded and will be automatically deleted after 30 days."
  default     = false
}

variable "config_connector" {
  type        = bool
  description = "Whether ConfigConnector is enabled for this cluster."
  default     = false
}

variable "enable_l4_ilb_subsetting" {
  type        = bool
  description = "Enable L4 ILB Subsetting on the cluster"
  default     = false
}

variable "istio" {
  description = "(Beta) Enable Istio addon"
  type        = bool
  default     = false
}

variable "istio_auth" {
  type        = string
  description = "(Beta) The authentication type between services in Istio."
  default     = "AUTH_MUTUAL_TLS"
}

variable "kalm_config" {
  type        = bool
  description = "(Beta) Whether KALM is enabled for this cluster."
  default     = false
}

variable "cloudrun" {
  description = "(Beta) Enable CloudRun addon"
  type        = bool
  default     = false
}

variable "cloudrun_load_balancer_type" {
  description = "(Beta) Configure the Cloud Run load balancer type. External by default. Set to `LOAD_BALANCER_TYPE_INTERNAL` to configure as an internal load balancer."
  type        = string
  default     = ""
}

variable "enable_pod_security_policy" {
  type        = bool
  description = "enabled - Enable the PodSecurityPolicy controller for this cluster. If enabled, pods must be valid under a PodSecurityPolicy to be created. Pod Security Policy was removed from GKE clusters with version >= 1.25.0."
  default     = false
}

variable "sandbox_enabled" {
  type        = bool
  description = "(Beta) Enable GKE Sandbox (Do not forget to set `image_type` = `COS_CONTAINERD` to use it)."
  default     = false
}

variable "enable_intranode_visibility" {
  type        = bool
  description = "Whether Intra-node visibility is enabled for this cluster. This makes same node pod to pod traffic visible for VPC network"
  default     = false
}

variable "enable_identity_service" {
  type        = bool
  description = "Enable the Identity Service component, which allows customers to use external identity providers with the K8S API."
  default     = false
}

variable "enable_gcfs" {
  type        = bool
  description = "Enable image streaming on cluster level."
  default     = false
}

variable "fleet_project" {
  description = "(Optional) Register the cluster with the fleet in this project."
  type        = string
  default     = null
}

variable "fleet_project_grant_service_agent" {
  description = "(Optional) Grant the fleet project service identity the `roles/gkehub.serviceAgent` and `roles/gkehub.crossProjectServiceAgent` roles."
  type        = bool
  default     = false
}