feat(cluster.tf): add support to set initial release channel version

autogen/main/cluster.tf.tmpl

@@ -83,7 +83,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
 {% if beta_cluster and autopilot_cluster != true %}
   dynamic "cluster_telemetry" {

cluster.tf

@@ -69,7 +69,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   # only one of logging/monitoring_service or logging/monitoring_config can be specified
   logging_service = local.logmon_config_is_set ? null : var.logging_service

examples/simple_regional_private_with_cluster_version/README.md

@@ -0,0 +1,49 @@
+# Simple Regional Cluster
+
+This example illustrates how to create a simple private cluster with beta features.
+
+[^]: (autogen_docs_start)
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| cloudrun | Boolean to enable / disable CloudRun | string | `"true"` | no |
+| cluster\_name\_suffix | A suffix to append to the default cluster name | string | `""` | no |
+| compute\_engine\_service\_account | Service account to associate to the nodes in the cluster | string | n/a | yes |
+| credentials\_path | The path to the GCP credentials JSON file | string | n/a | yes |
+| ip\_range\_pods | The secondary ip range to use for pods | string | n/a | yes |
+| ip\_range\_services | The secondary ip range to use for pods | string | n/a | yes |
+| istio | Boolean to enable / disable Istio | string | `"true"` | no |
+| network | The VPC network to host the cluster in | string | n/a | yes |
+| project\_id | The project ID to host the cluster in | string | n/a | yes |
+| region | The region to host the cluster in | string | n/a | yes |
+| subnetwork | The subnetwork to host the cluster in | string | n/a | yes |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| ca\_certificate |  |
+| client\_token |  |
+| cluster\_name | Cluster name |
+| credentials\_path |  |
+| ip\_range\_pods | The secondary IP range used for pods |
+| ip\_range\_services | The secondary IP range used for services |
+| kubernetes\_endpoint |  |
+| location |  |
+| master\_kubernetes\_version | The master Kubernetes version |
+| network |  |
+| project\_id |  |
+| region |  |
+| service\_account | The service account to default running nodes as if not overridden in `node_pools`. |
+| subnetwork |  |
+| zones | List of zones in which the cluster resides |
+
+[^]: (autogen_docs_end)
+
+To provision this example, run the following from within this directory:
+- `terraform init` to get the plugins
+- `terraform plan` to see the infrastructure plan
+- `terraform apply` to apply the infrastructure build
+- `terraform destroy` to destroy the built infrastructure

examples/simple_regional_private_with_cluster_version/main.tf

@@ -0,0 +1,76 @@
+/**
+ * Copyright 2018 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.
+ */
+
+locals {
+  cluster_type = "simple-regional-private"
+}
+
+data "google_client_config" "default" {}
+
+provider "kubernetes" {
+  host                   = "https://${module.gke.endpoint}"
+  token                  = data.google_client_config.default.access_token
+  cluster_ca_certificate = base64decode(module.gke.ca_certificate)
+}
+
+data "google_compute_subnetwork" "subnetwork" {
+  name    = var.subnetwork
+  project = var.project_id
+  region  = var.region
+}
+
+module "gke" {
+  source                    = "../../modules/private-cluster/"
+  project_id                = var.project_id
+  name                      = "${local.cluster_type}-cluster${var.cluster_name_suffix}"
+  regional                  = true
+  region                    = var.region
+  network                   = var.network
+  kubernetes_version        = var.kubernetes_version
+  subnetwork                = var.subnetwork
+  ip_range_pods             = var.ip_range_pods
+  ip_range_services         = var.ip_range_services
+  create_service_account    = false
+  service_account           = var.compute_engine_service_account
+  enable_private_endpoint   = true
+  enable_private_nodes      = true
+  master_ipv4_cidr_block    = "172.16.0.0/28"
+  default_max_pods_per_node = 20
+  remove_default_node_pool  = true
+
+  node_pools = [
+    {
+      name              = "pool-01"
+      min_count         = 1
+      max_count         = 100
+      local_ssd_count   = 0
+      disk_size_gb      = 100
+      disk_type         = "pd-standard"
+      auto_repair       = true
+      auto_upgrade      = true
+      service_account   = var.compute_engine_service_account
+      preemptible       = false
+      max_pods_per_node = 12
+    },
+  ]
+
+  master_authorized_networks = [
+    {
+      cidr_block   = data.google_compute_subnetwork.subnetwork.ip_cidr_range
+      display_name = "VPC"
+    },
+  ]
+}

examples/simple_regional_private_with_cluster_version/outputs.tf

@@ -0,0 +1,35 @@
+/**
+ * Copyright 2018 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.
+ */
+
+output "kubernetes_endpoint" {
+  sensitive = true
+  value     = module.gke.endpoint
+}
+
+output "client_token" {
+  sensitive = true
+  value     = base64encode(data.google_client_config.default.access_token)
+}
+
+output "ca_certificate" {
+  value = module.gke.ca_certificate
+}
+
+output "service_account" {
+  description = "The default service account used for running nodes."
+  value       = module.gke.service_account
+}
+

examples/simple_regional_private_with_cluster_version/test_outputs.tf

@@ -0,0 +1 @@
+../../test/fixtures/all_examples/test_outputs.tf

examples/simple_regional_private_with_cluster_version/variables.tf

@@ -0,0 +1,54 @@
+/**
+ * Copyright 2018 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 "project_id" {
+  description = "The project ID to host the cluster in"
+}
+
+variable "cluster_name_suffix" {
+  description = "A suffix to append to the default cluster name"
+  default     = ""
+}
+
+variable "region" {
+  description = "The region to host the cluster in"
+}
+
+variable "network" {
+  description = "The VPC network to host the cluster in"
+}
+
+variable "subnetwork" {
+  description = "The subnetwork to host the cluster in"
+}
+
+variable "ip_range_pods" {
+  description = "The secondary ip range to use for pods"
+}
+
+variable "ip_range_services" {
+  description = "The secondary ip range to use for services"
+}
+
+variable "compute_engine_service_account" {
+  description = "Service account to associate to the nodes in the cluster"
+}
+
+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"
+}

examples/simple_regional_private_with_cluster_version/versions.tf

@@ -0,0 +1,28 @@
+/**
+ * Copyright 2021 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.
+ */
+
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 4.0"
+    }
+    kubernetes = {
+      source = "hashicorp/kubernetes"
+    }
+  }
+  required_version = ">= 0.13"
+}

modules/beta-autopilot-private-cluster/cluster.tf

@@ -67,7 +67,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   cluster_autoscaling {
     dynamic "auto_provisioning_defaults" {

modules/beta-autopilot-public-cluster/cluster.tf

@@ -67,7 +67,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   cluster_autoscaling {
     dynamic "auto_provisioning_defaults" {

modules/beta-private-cluster-update-variant/cluster.tf

@@ -75,7 +75,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   dynamic "cluster_telemetry" {
     for_each = local.cluster_telemetry_type_is_set ? [1] : []

modules/beta-private-cluster/cluster.tf

@@ -75,7 +75,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   dynamic "cluster_telemetry" {
     for_each = local.cluster_telemetry_type_is_set ? [1] : []

modules/beta-public-cluster-update-variant/cluster.tf

@@ -75,7 +75,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   dynamic "cluster_telemetry" {
     for_each = local.cluster_telemetry_type_is_set ? [1] : []

modules/beta-public-cluster/cluster.tf

@@ -75,7 +75,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   dynamic "cluster_telemetry" {
     for_each = local.cluster_telemetry_type_is_set ? [1] : []

modules/private-cluster-update-variant/cluster.tf

@@ -69,7 +69,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   # only one of logging/monitoring_service or logging/monitoring_config can be specified
   logging_service = local.logmon_config_is_set ? null : var.logging_service

modules/private-cluster/cluster.tf

@@ -69,7 +69,7 @@ resource "google_container_cluster" "primary" {
     disabled = var.disable_default_snat
   }
 
-  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : null
+  min_master_version = var.release_channel == null || var.release_channel == "UNSPECIFIED" ? local.master_version : var.kubernetes_version == "latest" ? null : var.kubernetes_version
 
   # only one of logging/monitoring_service or logging/monitoring_config can be specified
   logging_service = local.logmon_config_is_set ? null : var.logging_service

test/fixtures/shared/variables.tf

@@ -39,3 +39,9 @@ variable "registry_project_ids" {
   description = "Projects to use for granting access to GCR registries, if requested"
   type        = list(string)
 }
+
+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"
+}

test/fixtures/simple_regional_private_with_cluster_version/example.tf

@@ -0,0 +1,30 @@
+/**
+ * Copyright 2018 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 "example" {
+  source = "../../../examples/simple_regional_private_with_cluster_version"
+
+  project_id                     = var.project_ids[1]
+  cluster_name_suffix            = "-${random_string.suffix.result}"
+  kubernetes_version             = var.kubernetes_version
+  region                         = var.region
+  network                        = google_compute_network.main.name
+  subnetwork                     = google_compute_subnetwork.main.name
+  ip_range_pods                  = google_compute_subnetwork.main.secondary_ip_range[0].range_name
+  ip_range_services              = google_compute_subnetwork.main.secondary_ip_range[1].range_name
+  compute_engine_service_account = var.compute_engine_service_accounts[1]
+}
+