Add support for internal service account to GKE nodepool module (#156)
* add support for internal service account to GKE nodepool module, fixes #62 * update shared vpc example to use internally managed service account * update shared vpc example to use internally managed service account * update hub and spoke peering example to use renamed gke nodepool variables
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@ -4,6 +4,10 @@ This module allows simplified creation and management of individual GKE nodepool
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## Example usage
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### Module defaults
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If no specific node configuration is set via variables, the module uses the provider's defaults only setting OAuth scopes to a minimal working set (devstorage read-only, logging and monitoring write) and the node machine type to `n1-standard-1`. The service account set by the provider in this case is the GCE default service account.
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```hcl
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module "cluster-1-nodepool-1" {
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source = "../modules/gke-nodepool"
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@ -14,6 +18,21 @@ module "cluster-1-nodepool-1" {
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}
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```
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### Internally managed service account
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To have the module auto-create a service account for the nodes, set the `node_service_account_create` variable to `true`. When a service account is created by the module, OAuth scopes are set to `cloud-platform` by default. The service account resource and email (in both plain and IAM formats) are then available in outputs to assign IAM roles from your own code.
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```hcl
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module "cluster-1-nodepool-1" {
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source = "../modules/gke-nodepool"
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project_id = "myproject"
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cluster_name = "cluster-1"
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location = "europe-west1-b"
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name = "nodepool-1"
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node_service_account_create = true
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}
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```
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<!-- BEGIN TFDOC -->
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## Variables
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@ -28,23 +47,24 @@ module "cluster-1-nodepool-1" {
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| *management_config* | Optional node management configuration. | <code title="object({ auto_repair = bool auto_upgrade = bool })">object({...})</code> | | <code title="">null</code> |
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| *max_pods_per_node* | Maximum number of pods per node. | <code title="">number</code> | | <code title="">null</code> |
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| *name* | Optional nodepool name. | <code title="">string</code> | | <code title="">null</code> |
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| *node_config_disk_size* | Node disk size, defaults to 100GB. | <code title="">number</code> | | <code title="">100</code> |
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| *node_config_disk_type* | Node disk type, defaults to pd-standard. | <code title="">string</code> | | <code title="">pd-standard</code> |
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| *node_config_guest_accelerator* | Map of type and count of attached accelerator cards. | <code title="map(number)">map(number)</code> | | <code title="">{}</code> |
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| *node_config_image_type* | Nodes image type. | <code title="">string</code> | | <code title="">null</code> |
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| *node_config_labels* | Kubernetes labels attached to nodes. | <code title="map(string)">map(string)</code> | | <code title="">{}</code> |
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| *node_config_local_ssd_count* | Number of local SSDs attached to nodes. | <code title="">number</code> | | <code title="">0</code> |
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| *node_config_machine_type* | Nodes machine type. | <code title="">string</code> | | <code title="">n1-standard-1</code> |
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| *node_config_metadata* | Metadata key/value pairs assigned to nodes. Set disable-legacy-endpoints to true when using this variable. | <code title="map(string)">map(string)</code> | | <code title="">null</code> |
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| *node_config_min_cpu_platform* | Minimum CPU platform for nodes. | <code title="">string</code> | | <code title="">null</code> |
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| *node_config_oauth_scopes* | Set of Google API scopes for the nodes service account. Include logging-write, monitoring, and storage-ro when using this variable. | <code title="list(string)">list(string)</code> | | <code title="">["logging-write", "monitoring", "monitoring-write", "storage-ro"]</code> |
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| *node_config_preemptible* | Use preemptible VMs for nodes. | <code title="">bool</code> | | <code title="">null</code> |
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| *node_config_sandbox_config* | GKE Sandbox configuration. Needs image_type set to COS_CONTAINERD and node_version set to 1.12.7-gke.17 when using this variable. | <code title="">string</code> | | <code title="">null</code> |
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| *node_config_service_account* | Service account used for nodes. | <code title="">string</code> | | <code title="">null</code> |
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| *node_config_shielded_instance_config* | Shielded instance options. | <code title="object({ enable_secure_boot = bool enable_integrity_monitoring = bool })">object({...})</code> | | <code title="">null</code> |
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| *node_config_tags* | Network tags applied to nodes. | <code title="list(string)">list(string)</code> | | <code title="">null</code> |
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| *node_count* | Number of nodes per instance group, can be updated after creation. Ignored when autoscaling is set. | <code title="">number</code> | | <code title="">null</code> |
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| *node_disk_size* | Node disk size, defaults to 100GB. | <code title="">number</code> | | <code title="">100</code> |
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| *node_disk_type* | Node disk type, defaults to pd-standard. | <code title="">string</code> | | <code title="">pd-standard</code> |
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| *node_guest_accelerator* | Map of type and count of attached accelerator cards. | <code title="map(number)">map(number)</code> | | <code title="">{}</code> |
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| *node_image_type* | Nodes image type. | <code title="">string</code> | | <code title="">null</code> |
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| *node_labels* | Kubernetes labels attached to nodes. | <code title="map(string)">map(string)</code> | | <code title="">{}</code> |
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| *node_local_ssd_count* | Number of local SSDs attached to nodes. | <code title="">number</code> | | <code title="">0</code> |
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| *node_locations* | Optional list of zones in which nodes should be located. Uses cluster locations if unset. | <code title="list(string)">list(string)</code> | | <code title="">null</code> |
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| *node_machine_type* | Nodes machine type. | <code title="">string</code> | | <code title="">n1-standard-1</code> |
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| *node_metadata* | Metadata key/value pairs assigned to nodes. Set disable-legacy-endpoints to true when using this variable. | <code title="map(string)">map(string)</code> | | <code title="">null</code> |
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| *node_min_cpu_platform* | Minimum CPU platform for nodes. | <code title="">string</code> | | <code title="">null</code> |
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| *node_preemptible* | Use preemptible VMs for nodes. | <code title="">bool</code> | | <code title="">null</code> |
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| *node_sandbox_config* | GKE Sandbox configuration. Needs image_type set to COS_CONTAINERD and node_version set to 1.12.7-gke.17 when using this variable. | <code title="">string</code> | | <code title="">null</code> |
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| *node_service_account* | Service account email. Unused if service account is auto-created. | <code title="">string</code> | | <code title="">null</code> |
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| *node_service_account_create* | Auto-create service account. | <code title="">bool</code> | | <code title="">false</code> |
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| *node_service_account_scopes* | Scopes applied to service account. Default to: 'cloud-platform' when creating a service account; 'devstorage.read_only', 'logging.write', 'monitoring.write' otherwise. | <code title="list(string)">list(string)</code> | | <code title="">[]</code> |
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| *node_shielded_instance_config* | Shielded instance options. | <code title="object({ enable_secure_boot = bool enable_integrity_monitoring = bool })">object({...})</code> | | <code title="">null</code> |
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| *node_tags* | Network tags applied to nodes. | <code title="list(string)">list(string)</code> | | <code title="">null</code> |
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| *upgrade_config* | Optional node upgrade configuration. | <code title="object({ max_surge = number max_unavailable = number })">object({...})</code> | | <code title="">null</code> |
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| *workload_metadata_config* | Metadata configuration to expose to workloads on the node pool. | <code title="">string</code> | | <code title="">GKE_METADATA_SERVER</code> |
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@ -53,4 +73,7 @@ module "cluster-1-nodepool-1" {
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| name | description | sensitive |
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|---|---|:---:|
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| name | Nodepool name. | |
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| service_account | Service account resource. | |
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| service_account_email | Service account email. | |
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| service_account_iam_email | Service account email. | |
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<!-- END TFDOC -->
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@ -14,6 +14,38 @@
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* limitations under the License.
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*/
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locals {
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service_account_email = (
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var.node_service_account_create
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? (
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length(google_service_account.service_account) > 0
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? google_service_account.service_account[0].email
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: null
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)
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: var.node_service_account
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)
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service_account_scopes = (
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length(var.node_service_account_scopes) > 0
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? var.node_service_account_scopes
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: (
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var.node_service_account_create
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? ["https://www.googleapis.com/auth/cloud-platform"]
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: [
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"https://www.googleapis.com/auth/devstorage.read_only",
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"https://www.googleapis.com/auth/logging.write",
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"https://www.googleapis.com/auth/monitoring.write"
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]
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)
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)
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}
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resource "google_service_account" "service_account" {
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count = var.node_service_account_create ? 1 : 0
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project = var.project_id
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account_id = "tf-gke-${var.cluster_name}-${var.name}"
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display_name = "Terraform GKE ${var.cluster_name} ${var.name}."
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}
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resource "google_container_node_pool" "nodepool" {
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provider = google-beta
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@ -29,21 +61,21 @@ resource "google_container_node_pool" "nodepool" {
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version = var.gke_version
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node_config {
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disk_size_gb = var.node_config_disk_size
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disk_type = var.node_config_disk_type
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image_type = var.node_config_image_type
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labels = var.node_config_labels
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local_ssd_count = var.node_config_local_ssd_count
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machine_type = var.node_config_machine_type
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metadata = var.node_config_metadata
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min_cpu_platform = var.node_config_min_cpu_platform
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oauth_scopes = var.node_config_oauth_scopes
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preemptible = var.node_config_preemptible
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service_account = var.node_config_service_account
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tags = var.node_config_tags
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disk_size_gb = var.node_disk_size
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disk_type = var.node_disk_type
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image_type = var.node_image_type
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labels = var.node_labels
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local_ssd_count = var.node_local_ssd_count
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machine_type = var.node_machine_type
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metadata = var.node_metadata
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min_cpu_platform = var.node_min_cpu_platform
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oauth_scopes = local.service_account_scopes
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preemptible = var.node_preemptible
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service_account = local.service_account_email
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tags = var.node_tags
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dynamic guest_accelerator {
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for_each = var.node_config_guest_accelerator
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for_each = var.node_guest_accelerator
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iterator = config
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content {
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type = config.key
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@ -53,8 +85,8 @@ resource "google_container_node_pool" "nodepool" {
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dynamic sandbox_config {
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for_each = (
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var.node_config_sandbox_config != null
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? [var.node_config_sandbox_config]
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var.node_sandbox_config != null
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? [var.node_sandbox_config]
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: []
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)
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iterator = config
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@ -65,8 +97,8 @@ resource "google_container_node_pool" "nodepool" {
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dynamic shielded_instance_config {
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for_each = (
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var.node_config_shielded_instance_config != null
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? [var.node_config_shielded_instance_config]
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var.node_shielded_instance_config != null
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? [var.node_shielded_instance_config]
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: []
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)
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iterator = config
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@ -18,3 +18,25 @@ output "name" {
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description = "Nodepool name."
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value = google_container_node_pool.nodepool.name
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}
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output "service_account" {
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description = "Service account resource."
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value = (
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var.node_service_account_create
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? google_service_account.service_account[0]
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: null
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)
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}
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output "service_account_email" {
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description = "Service account email."
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value = local.service_account_email
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}
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output "service_account_iam_email" {
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description = "Service account email."
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value = join("", [
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"serviceAccount:",
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local.service_account_email == null ? "" : local.service_account_email
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])
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}
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@ -66,85 +66,93 @@ variable "name" {
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default = null
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}
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variable "node_config_disk_size" {
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variable "node_disk_size" {
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description = "Node disk size, defaults to 100GB."
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type = number
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default = 100
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}
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variable "node_config_disk_type" {
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variable "node_disk_type" {
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description = "Node disk type, defaults to pd-standard."
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type = string
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default = "pd-standard"
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}
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variable "node_config_guest_accelerator" {
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variable "node_guest_accelerator" {
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description = "Map of type and count of attached accelerator cards."
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type = map(number)
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default = {}
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}
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variable "node_config_image_type" {
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variable "node_image_type" {
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description = "Nodes image type."
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type = string
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default = null
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}
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variable "node_config_labels" {
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variable "node_labels" {
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description = "Kubernetes labels attached to nodes."
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type = map(string)
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default = {}
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}
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variable "node_config_local_ssd_count" {
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variable "node_local_ssd_count" {
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description = "Number of local SSDs attached to nodes."
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type = number
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default = 0
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}
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variable "node_config_machine_type" {
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variable "node_machine_type" {
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description = "Nodes machine type."
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type = string
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default = "n1-standard-1"
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}
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variable "node_config_metadata" {
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variable "node_metadata" {
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description = "Metadata key/value pairs assigned to nodes. Set disable-legacy-endpoints to true when using this variable."
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type = map(string)
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default = null
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}
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variable "node_config_min_cpu_platform" {
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variable "node_min_cpu_platform" {
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description = "Minimum CPU platform for nodes."
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type = string
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default = null
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}
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variable "node_config_oauth_scopes" {
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description = "Set of Google API scopes for the nodes service account. Include logging-write, monitoring, and storage-ro when using this variable."
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type = list(string)
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default = ["logging-write", "monitoring", "monitoring-write", "storage-ro"]
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}
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variable "node_config_preemptible" {
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variable "node_preemptible" {
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description = "Use preemptible VMs for nodes."
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type = bool
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default = null
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}
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variable "node_config_sandbox_config" {
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variable "node_sandbox_config" {
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description = "GKE Sandbox configuration. Needs image_type set to COS_CONTAINERD and node_version set to 1.12.7-gke.17 when using this variable."
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type = string
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default = null
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}
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variable "node_config_service_account" {
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description = "Service account used for nodes."
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variable "node_service_account" {
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description = "Service account email. Unused if service account is auto-created."
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type = string
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default = null
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}
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variable "node_config_shielded_instance_config" {
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variable "node_service_account_create" {
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description = "Auto-create service account."
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type = bool
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default = false
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}
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# scopes and scope aliases list
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# https://cloud.google.com/sdk/gcloud/reference/compute/instances/create#--scopes
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variable "node_service_account_scopes" {
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description = "Scopes applied to service account. Default to: 'cloud-platform' when creating a service account; 'devstorage.read_only', 'logging.write', 'monitoring.write' otherwise."
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type = list(string)
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default = []
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}
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variable "node_shielded_instance_config" {
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description = "Shielded instance options."
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type = object({
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enable_secure_boot = bool
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default = null
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}
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variable "node_config_tags" {
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variable "node_tags" {
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description = "Network tags applied to nodes."
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type = list(string)
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default = null
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}
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# variable "node_config_taint" {
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# variable "node_taint" {
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# description = "Kubernetes taints applied to nodes."
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# type = string
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# default = null
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@ -225,7 +225,7 @@ module "cluster-1-nodepool-1" {
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project_id = var.project_id
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location = module.cluster-1.location
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cluster_name = module.cluster-1.name
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node_config_service_account = module.service-account-gke-node.email
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node_service_account = module.service-account-gke-node.email
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}
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# roles assigned via this module use non-authoritative IAM bindings at the
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@ -39,7 +39,6 @@ There's a minor glitch that can surface running `terraform destroy`, where the s
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|---|---|:---:|
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| gke_clusters | GKE clusters information. | |
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| projects | Project ids. | |
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| service_accounts | GCE and GKE service accounts. | |
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| vms | GCE VMs. | |
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| vpc | Shared VPC. | |
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<!-- END TFDOC -->
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@ -74,8 +74,8 @@ module "project-svc-gke" {
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}
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iam = {
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"roles/container.developer" = [module.vm-bastion.service_account_iam_email],
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"roles/logging.logWriter" = [module.service-account-gke-node.iam_email],
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"roles/monitoring.metricWriter" = [module.service-account-gke-node.iam_email],
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"roles/logging.logWriter" = [module.cluster-1-nodepool-1.service_account_iam_email],
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"roles/monitoring.metricWriter" = [module.cluster-1-nodepool-1.service_account_iam_email],
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"roles/owner" = var.owners_gke
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}
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}
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@ -220,14 +220,5 @@ module "cluster-1-nodepool-1" {
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project_id = module.project-svc-gke.project_id
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location = module.cluster-1.location
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cluster_name = module.cluster-1.name
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node_config_service_account = module.service-account-gke-node.email
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}
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# roles assigned via this module use non-authoritative IAM bindings at the
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# project level, with no risk of conflicts with pre-existing roles
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module "service-account-gke-node" {
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source = "../../modules/iam-service-account"
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project_id = module.project-svc-gke.project_id
|
||||
name = "gke-node"
|
||||
node_service_account_create = true
|
||||
}
|
||||
|
|
|
@ -28,14 +28,6 @@ output "projects" {
|
|||
}
|
||||
}
|
||||
|
||||
output "service_accounts" {
|
||||
description = "GCE and GKE service accounts."
|
||||
value = {
|
||||
bastion = module.vm-bastion.service_account_email
|
||||
gke_node = module.service-account-gke-node.email
|
||||
}
|
||||
}
|
||||
|
||||
output "vpc" {
|
||||
description = "Shared VPC."
|
||||
value = {
|
||||
|
|
|
@ -0,0 +1,13 @@
|
|||
# Copyright 2020 Google LLC
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
|
@ -0,0 +1,26 @@
|
|||
/**
|
||||
* Copyright 2020 Google LLC
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
module "test" {
|
||||
source = "../../../../modules/gke-nodepool"
|
||||
project_id = "my-project"
|
||||
cluster_name = "cluster-1"
|
||||
location = "europe-west1-b"
|
||||
name = "nodepool-1"
|
||||
node_service_account = var.node_service_account
|
||||
node_service_account_create = var.node_service_account_create
|
||||
node_service_account_scopes = var.node_service_account_scopes
|
||||
}
|
|
@ -0,0 +1,32 @@
|
|||
/**
|
||||
* Copyright 2020 Google LLC
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
variable "node_service_account" {
|
||||
type = string
|
||||
default = null
|
||||
}
|
||||
|
||||
variable "node_service_account_create" {
|
||||
type = bool
|
||||
default = false
|
||||
}
|
||||
|
||||
# scopes and scope aliases list
|
||||
# https://cloud.google.com/sdk/gcloud/reference/compute/instances/create#--scopes
|
||||
variable "node_service_account_scopes" {
|
||||
type = list(string)
|
||||
default = []
|
||||
}
|
|
@ -0,0 +1,64 @@
|
|||
# Copyright 2020 Google LLC
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
|
||||
import os
|
||||
import pytest
|
||||
|
||||
|
||||
FIXTURES_DIR = os.path.join(os.path.dirname(__file__), 'fixture')
|
||||
OAUTH_SCOPE = ['https://www.googleapis.com/auth/cloud-platform']
|
||||
OAUTH_SCOPES = [
|
||||
'https://www.googleapis.com/auth/devstorage.read_only',
|
||||
'https://www.googleapis.com/auth/logging.write',
|
||||
'https://www.googleapis.com/auth/monitoring.write']
|
||||
|
||||
|
||||
def test_defaults(plan_runner):
|
||||
"Test resources created with variable defaults."
|
||||
_, resources = plan_runner(FIXTURES_DIR)
|
||||
assert len(resources) == 1
|
||||
node_config = resources[0]['values']['node_config'][0]
|
||||
assert node_config['oauth_scopes'] == OAUTH_SCOPES
|
||||
assert 'service_account' not in node_config
|
||||
|
||||
|
||||
def test_external_sa(plan_runner):
|
||||
"Test resources created with externally managed sa."
|
||||
_, resources = plan_runner(
|
||||
FIXTURES_DIR, node_service_account='foo@example.org')
|
||||
assert len(resources) == 1
|
||||
node_config = resources[0]['values']['node_config'][0]
|
||||
assert node_config['oauth_scopes'] == OAUTH_SCOPES
|
||||
assert node_config['service_account'] == 'foo@example.org'
|
||||
|
||||
|
||||
def test_external_scopes(plan_runner):
|
||||
"Test resources created with externally defined scopes."
|
||||
oauth_scopes = '["https://www.googleapis.com/auth/cloud-platform"]'
|
||||
_, resources = plan_runner(
|
||||
FIXTURES_DIR, node_service_account_scopes=oauth_scopes)
|
||||
assert len(resources) == 1
|
||||
node_config = resources[0]['values']['node_config'][0]
|
||||
assert node_config['oauth_scopes'] == OAUTH_SCOPE
|
||||
assert 'service_account' not in node_config
|
||||
|
||||
|
||||
def test_internal_sa(plan_runner):
|
||||
"Test resources created with internally managed sa."
|
||||
_, resources = plan_runner(FIXTURES_DIR, node_service_account_create='true')
|
||||
assert len(resources) == 2
|
||||
node_config = resources[0]['values']['node_config'][0]
|
||||
assert node_config['oauth_scopes'] == OAUTH_SCOPE
|
||||
assert 'service_account' not in node_config
|
|
@ -23,5 +23,5 @@ FIXTURES_DIR = os.path.join(os.path.dirname(__file__), 'fixture')
|
|||
def test_resources(e2e_plan_runner):
|
||||
"Test that plan works and the numbers of resources is as expected."
|
||||
modules, resources = e2e_plan_runner(FIXTURES_DIR)
|
||||
assert len(modules) == 11
|
||||
assert len(modules) == 10
|
||||
assert len(resources) == 43
|
||||
|
|
Loading…
Reference in New Issue