1/**
2 * Copyright 2022 Google LLC
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17```hcl
18data "google_compute_image" "my_image" {
19 family = "debian-11"
20 project = "debian-cloud"
21}
22
23resource "google_compute_instance_template" "igm-basic" {
24 name = "my-template"
25 machine_type = "e2-medium"
26 can_ip_forward = false
27 tags = ["foo", "bar"]
28
29 disk {
30 source_image = data.google_compute_image.my_image.self_link
31 auto_delete = true
32 boot = true
33 }
34
35 network_interface {
36 network = "default"
37 }
38
39 service_account {
40 scopes = ["userinfo-email", "compute-ro", "storage-ro"]
41 }
42}
43
44resource "google_compute_region_instance_group_manager" "rigm" {
45 description = "Terraform test instance group manager"
46 name = "my-rigm"
47
48 version {
49 name = "prod"
50 instance_template = google_compute_instance_template.igm-basic.self_link
51 }
52
53 update_policy {
54 type = "OPPORTUNISTIC"
55 instance_redistribution_type = "NONE"
56 minimal_action = "RESTART"
57 }
58
59 base_instance_name = "rigm"
60 region = "us-central1"
61 target_size = 2
62}
63
64resource "google_compute_disk" "default" {
65 name = "my-disk-name"
66 type = "pd-ssd"
67 zone = "us-central1-a"
68 image = "debian-11-bullseye-v20220719"
69 physical_block_size_bytes = 4096
70}
71
72resource "google_compute_region_per_instance_config" "with_disk" {
73 region = google_compute_region_instance_group_manager.igm.region
74 region_instance_group_manager = google_compute_region_instance_group_manager.rigm.name
75 name = "instance-1"
76 preserved_state {
77 metadata = {
78 foo = "bar"
79 // Adding a reference to the instance template used causes the stateful instance to update
80 // if the instance template changes. Otherwise there is no explicit dependency and template
81 // changes may not occur on the stateful instance
82 instance_template = google_compute_instance_template.igm-basic.self_link
83 }
84
85 disk {
86 device_name = "my-stateful-disk"
87 source = google_compute_disk.default.id
88 mode = "READ_ONLY"
89 }
90 }
91}
92```
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