docs: Add Managed Kafka Connect terraform sample for Clusters

managedkafka/managedkafka_create_connect_cluster/main.tf

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+/**
+ * Copyright 2025 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.
+ */
+
+# [START managedkafka_create_connect_cluster_parent]
+resource "google_managed_kafka_cluster" "default" {
+  project    = data.google_project.default.project_id
+  cluster_id = "my-cluster-id"
+  location   = "us-central1"
+  capacity_config {
+    vcpu_count   = 3
+    memory_bytes = 3221225472 # 3 GiB
+  }
+  gcp_config {
+    access_config {
+      network_configs {
+        subnet = google_compute_subnetwork.default.id
+      }
+    }
+  }
+}
+
+# [START managedkafka_create_connect_cluster]
+resource "google_managed_kafka_connect_cluster" "default" {
+  provider           = google-beta
+  project            = data.google_project.default.project_id
+  connect_cluster_id = "my-connect-cluster-id"
+  location           = "us-central1"
+  kafka_cluster      = google_managed_kafka_cluster.default.id
+  capacity_config {
+    vcpu_count   = 12
+    memory_bytes = 12884901888 # 12 GiB
+  }
+  gcp_config {
+    access_config {
+      network_configs {
+        primary_subnet = google_compute_subnetwork.default.id
+      }
+    }
+  }
+}
+# [END managedkafka_create_connect_cluster]
+
+# Note: Due to a known issue, network attachment resources may not be
+# properly deleted, which can cause 'terraform destroy' to hang. It is
+# recommended to destroy network resources separately from the Kafka
+# Connect resources.
+# The documentation elaborates further on the recommended approach.
+# [START managedkafka_subnetwork]
+resource "google_compute_subnetwork" "default" {
+  name          = "test-subnetwork"
+  ip_cidr_range = "10.2.0.0/16"
+  region        = "us-central1"
+  network       = google_compute_network.default.id
+}
+
+resource "google_compute_network" "default" {
+  name                    = "test-network"
+  auto_create_subnetworks = false
+}
+# [END managedkafka_subnetwork]
+
+data "google_project" "default" {
+}
+# [END managedkafka_create_connect_cluster_parent]

managedkafka/managedkafka_create_connect_cluster/test.yaml

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+# Copyright 2025 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.
+
+apiVersion: blueprints.cloud.google.com/v1alpha1
+kind: BlueprintTest
+metadata:
+  name: managedkafka_create_connect_cluster
+spec:
+  # This test is being skipped due to a known issue with leaking Network
+  # Attachment resources which prevents `terraform destroy` from completing
+  # successfully in the test environment.
+  skip: true