docs(samples): Adding samples for delete protection (#208)

* chore(samples): Adding samples for delete protection.

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* chore(samples): Applying review comment.

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: m-strzelczyk

compute/compute/snippets/sample_delete_protection.py

@@ -0,0 +1,147 @@
+#  Copyright 2022 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 compute_delete_protection_create]
+import sys
+
+# [END compute_delete_protection_create]
+
+# [START compute_delete_protection_get]
+# [START compute_delete_protection_set]
+# [START compute_delete_protection_create]
+from google.cloud import compute_v1
+
+# [END compute_delete_protection_create]
+# [END compute_delete_protection_set]
+# [END compute_delete_protection_get]
+
+
+# [START compute_delete_protection_create]
+def create_instance(
+    project_id: str, zone: str, instance_name: str, delete_protection: bool,
+) -> compute_v1.Instance:
+    """
+    Send an instance creation request to the Compute Engine API and wait for it to complete.
+
+    Args:
+        project_id: project ID or project number of the Cloud project you want to use.
+        zone: name of the zone you want to use. For example: “us-west3-b”
+        instance_name: name of the new virtual machine.
+        delete_protection: boolean value indicating if the new virtual machine should be
+            protected against deletion or not.
+    Returns:
+        Instance object.
+    """
+    instance_client = compute_v1.InstancesClient()
+    operation_client = compute_v1.ZoneOperationsClient()
+
+    # Describe the size and source image of the boot disk to attach to the instance.
+    disk = compute_v1.AttachedDisk()
+    initialize_params = compute_v1.AttachedDiskInitializeParams()
+    initialize_params.source_image = (
+        "projects/debian-cloud/global/images/family/debian-10"
+    )
+    initialize_params.disk_size_gb = 10
+    disk.initialize_params = initialize_params
+    disk.auto_delete = True
+    disk.boot = True
+    disk.type_ = "PERSISTENT"
+
+    # Use the default VPC network.
+    network_interface = compute_v1.NetworkInterface()
+    network_interface.name = "default"
+
+    # Collect information into the Instance object.
+    instance = compute_v1.Instance()
+    instance.name = instance_name
+    instance.disks = [disk]
+    instance.machine_type = f"zones/{zone}/machineTypes/e2-small"
+    instance.network_interfaces = [network_interface]
+
+    # Set the delete protection bit
+    instance.deletion_protection = delete_protection
+
+    # Prepare the request to insert an instance.
+    request = compute_v1.InsertInstanceRequest()
+    request.zone = zone
+    request.project = project_id
+    request.instance_resource = instance
+
+    # Wait for the create operation to complete.
+    print(f"Creating the {instance_name} instance in {zone}...")
+    operation = instance_client.insert_unary(request=request)
+    while operation.status != compute_v1.Operation.Status.DONE:
+        operation = operation_client.wait(
+            operation=operation.name, zone=zone, project=project_id
+        )
+    if operation.error:
+        print("Error during creation:", operation.error, file=sys.stderr)
+    if operation.warnings:
+        print("Warning during creation:", operation.warnings, file=sys.stderr)
+    print(f"Instance {instance_name} created.")
+    return instance
+
+
+# [END compute_delete_protection_create]
+
+
+# [START compute_delete_protection_set]
+def set_delete_protection(
+    project_id: str, zone: str, instance_name: str, delete_protection: bool
+):
+    """
+    Updates the delete protection setting of given instance.
+
+    Args:
+        project_id: project ID or project number of the Cloud project you want to use.
+        zone: name of the zone you want to use. For example: “us-west3-b”
+        instance_name: name of the virtual machine to update.
+        delete_protection: boolean value indicating if the virtual machine should be
+            protected against deletion or not.
+    """
+    instance_client = compute_v1.InstancesClient()
+    operation_client = compute_v1.ZoneOperationsClient()
+
+    request = compute_v1.SetDeletionProtectionInstanceRequest()
+    request.project = project_id
+    request.zone = zone
+    request.resource = instance_name
+    request.deletion_protection = delete_protection
+
+    operation = instance_client.set_deletion_protection_unary(request)
+    operation_client.wait(project=project_id, zone=zone, operation=operation.name)
+
+
+# [END compute_delete_protection_set]
+
+
+# [START compute_delete_protection_get]
+def get_delete_protection(project_id: str, zone: str, instance_name: str) -> bool:
+    """
+    Returns the state of delete protection flag of given instance.
+
+    Args:
+        project_id: project ID or project number of the Cloud project you want to use.
+        zone: name of the zone you want to use. For example: “us-west3-b”
+        instance_name: name of the virtual machine to check.
+    Returns:
+        The state of the delete protection setting.
+    """
+    instance_client = compute_v1.InstancesClient()
+    instance = instance_client.get(
+        project=project_id, zone=zone, instance=instance_name
+    )
+    return instance.deletion_protection
+
+
+# [END compute_delete_protection_get]

compute/compute/snippets/test_sample_delete_protection.py

@@ -0,0 +1,52 @@
+#  Copyright 2022 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 uuid
+
+import google.auth
+import pytest
+
+from quickstart import delete_instance
+from sample_delete_protection import create_instance
+from sample_delete_protection import get_delete_protection
+from sample_delete_protection import set_delete_protection
+
+PROJECT = google.auth.default()[1]
+INSTANCE_ZONE = "europe-central2-a"
+
+
+@pytest.fixture
+def autodelete_instance_name():
+    instance_name = "test-instance-" + uuid.uuid4().hex[:10]
+
+    yield instance_name
+
+    if get_delete_protection(PROJECT, INSTANCE_ZONE, instance_name):
+        set_delete_protection(PROJECT, INSTANCE_ZONE, instance_name, False)
+
+    delete_instance(PROJECT, INSTANCE_ZONE, instance_name)
+
+
+def test_delete_protection(autodelete_instance_name):
+    instance = create_instance(PROJECT, INSTANCE_ZONE, autodelete_instance_name, True)
+    assert instance.name == autodelete_instance_name
+
+    assert (
+        get_delete_protection(PROJECT, INSTANCE_ZONE, autodelete_instance_name) is True
+    )
+
+    set_delete_protection(PROJECT, INSTANCE_ZONE, autodelete_instance_name, False)
+
+    assert (
+        get_delete_protection(PROJECT, INSTANCE_ZONE, autodelete_instance_name) is False
+    )