Feature gap: Add missed sourceInstantSnapshot field (#15985) (#1204)

[upstream:f4d423a4e297b542fb3fd01aab36930a8b82b5e9]

Signed-off-by: Modular Magician <magic-modules@google.com>

Author: modular-magician

snapshot_basic_source_instant_snapshot/backing_file.tf

@@ -0,0 +1,15 @@
+# This file has some scaffolding to make sure that names are unique and that
+# a region and zone are selected when you try to create your Terraform resources.
+
+locals {
+  name_suffix = "${random_pet.suffix.id}"
+}
+
+resource "random_pet" "suffix" {
+  length = 2
+}
+
+provider "google" {
+  region = "us-central1"
+  zone   = "us-central1-c"
+}

snapshot_basic_source_instant_snapshot/main.tf

@@ -0,0 +1,29 @@
+resource "google_compute_snapshot" "snapshot" {
+  name        = "my-snapshot-${local.name_suffix}"
+  zone        = "us-central1-a"
+  source_instant_snapshot = google_compute_instant_snapshot.instant_snapshot.id
+}
+
+resource "google_compute_instant_snapshot" "instant_snapshot" {
+  name        = "my-instant-snapshot-${local.name_suffix}"
+  source_disk = google_compute_disk.persistent.self_link
+  zone        = google_compute_disk.persistent.zone
+
+  description = "A test snapshot"
+  labels = {
+	foo = "bar"
+  }
+}
+
+data "google_compute_image" "debian" {
+  family  = "debian-11"
+  project = "debian-cloud"
+}
+
+resource "google_compute_disk" "persistent" {
+  name  = "debian-disk-${local.name_suffix}"
+  image = data.google_compute_image.debian.self_link
+  size  = 10
+  type  = "pd-ssd"
+  zone  = "us-central1-a"
+}

snapshot_basic_source_instant_snapshot/motd

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+===
+
+These examples use real resources that will be billed to the
+Google Cloud Platform project you use - so make sure that you
+run "terraform destroy" before quitting!
+
+===

snapshot_basic_source_instant_snapshot/tutorial.md

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+# Snapshot Basic Source Instant Snapshot - Terraform
+
+## Setup
+
+<walkthrough-author name="rileykarson@google.com" analyticsId="UA-125550242-1" tutorialName="snapshot_basic_source_instant_snapshot" repositoryUrl="https://github.com/terraform-google-modules/docs-examples"></walkthrough-author>
+
+Welcome to Terraform in Google Cloud Shell! We need you to let us know what project you'd like to use with Terraform.
+
+<walkthrough-project-billing-setup></walkthrough-project-billing-setup>
+
+Terraform provisions real GCP resources, so anything you create in this session will be billed against this project.
+
+## Terraforming!
+
+Let's use {{project-id}} with Terraform! Click the Cloud Shell icon below to copy the command
+to your shell, and then run it from the shell by pressing Enter/Return. Terraform will pick up
+the project name from the environment variable.
+
+```bash
+export GOOGLE_CLOUD_PROJECT={{project-id}}
+```
+
+After that, let's get Terraform started. Run the following to pull in the providers.
+
+```bash
+terraform init
+```
+
+With the providers downloaded and a project set, you're ready to use Terraform. Go ahead!
+
+```bash
+terraform apply
+```
+
+Terraform will show you what it plans to do, and prompt you to accept. Type "yes" to accept the plan.
+
+```bash
+yes
+```
+
+
+## Post-Apply
+
+### Editing your config
+
+Now you've provisioned your resources in GCP! If you run a "plan", you should see no changes needed.
+
+```bash
+terraform plan
+```
+
+So let's make a change! Try editing a number, or appending a value to the name in the editor. Then,
+run a 'plan' again.
+
+```bash
+terraform plan
+```
+
+Afterwards you can run an apply, which implicitly does a plan and shows you the intended changes
+at the 'yes' prompt.
+
+```bash
+terraform apply
+```
+
+```bash
+yes
+```
+
+## Cleanup
+
+Run the following to remove the resources Terraform provisioned:
+
+```bash
+terraform destroy
+```
+```bash
+yes
+```