Adds Spot VM support to compute-vm
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Simone Ruffilli
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14f641f8a3
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@ -31,6 +31,34 @@ module "simple-vm-example" {
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```
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### Spot VM
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[Spot VMs](https://cloud.google.com/compute/docs/instances/spot) are ephemeral compute instances suitable for batch jobs and fault-tolerant workloads. Spot VMs provide new features that [preemptible instances](https://cloud.google.com/compute/docs/instances/preemptible) do not support, such as the absence of a maximum runtime.
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```hcl
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module "spot-vm-example" {
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source = "./modules/compute-vm"
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project_id = var.project_id
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zone = "europe-west1-b"
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name = "test"
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options = {
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allow_stopping_for_update = true
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deletion_protection = false
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preemptible = true
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spot = true
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}
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network_interfaces = [{
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network = var.vpc.self_link
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subnetwork = var.subnet.self_link
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nat = false
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addresses = null
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}]
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service_account_create = true
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}
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# tftest modules=1 resources=2
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```
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### Disk sources
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Attached disks can be created and optionally initialized from a pre-existing source, or attached to VMs when pre-existing. The `source` and `source_type` attributes of the `attached_disks` variable allows several modes of operation:
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@ -300,8 +328,8 @@ module "instance-group" {
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|---|---|:---:|:---:|:---:|
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| [name](variables.tf#L160) | Instance name. | <code>string</code> | ✓ | |
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| [network_interfaces](variables.tf#L174) | Network interfaces configuration. Use self links for Shared VPC, set addresses to null if not needed. | <code title="list(object({ nat = bool network = string subnetwork = string addresses = object({ internal = string external = string }) }))">list(object({…}))</code> | ✓ | |
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| [project_id](variables.tf#L201) | Project id. | <code>string</code> | ✓ | |
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| [zone](variables.tf#L260) | Compute zone. | <code>string</code> | ✓ | |
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| [project_id](variables.tf#L207) | Project id. | <code>string</code> | ✓ | |
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| [zone](variables.tf#L266) | Compute zone. | <code>string</code> | ✓ | |
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| [attached_disk_defaults](variables.tf#L17) | Defaults for attached disks options. | <code title="object({ mode = string replica_zone = string type = string })">object({…})</code> | | <code title="{ auto_delete = true mode = "READ_WRITE" replica_zone = null type = "pd-balanced" }">{…}</code> |
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| [attached_disks](variables.tf#L32) | Additional disks, if options is null defaults will be used in its place. Source type is one of 'image' (zonal disks in vms and template), 'snapshot' (vm), 'existing', and null. | <code title="list(object({ name = string size = string source = string source_type = string options = object({ mode = string replica_zone = string type = string }) }))">list(object({…}))</code> | | <code>[]</code> |
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| [boot_disk](variables.tf#L58) | Boot disk properties. | <code title="object({ image = string size = number type = string })">object({…})</code> | | <code title="{ image = "projects/debian-cloud/global/images/family/debian-11" type = "pd-balanced" size = 10 }">{…}</code> |
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@ -320,14 +348,14 @@ module "instance-group" {
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| [metadata](variables.tf#L148) | Instance metadata. | <code>map(string)</code> | | <code>{}</code> |
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| [min_cpu_platform](variables.tf#L154) | Minimum CPU platform. | <code>string</code> | | <code>null</code> |
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| [network_interface_options](variables.tf#L165) | Network interfaces extended options. The key is the index of the inteface to configure. The value is an object with alias_ips and nic_type. Set alias_ips or nic_type to null if you need only one of them. | <code title="map(object({ alias_ips = map(string) nic_type = string }))">map(object({…}))</code> | | <code>{}</code> |
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| [options](variables.tf#L187) | Instance options. | <code title="object({ allow_stopping_for_update = bool deletion_protection = bool preemptible = bool })">object({…})</code> | | <code title="{ allow_stopping_for_update = true deletion_protection = false preemptible = false }">{…}</code> |
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| [scratch_disks](variables.tf#L206) | Scratch disks configuration. | <code title="object({ count = number interface = string })">object({…})</code> | | <code title="{ count = 0 interface = "NVME" }">{…}</code> |
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| [service_account](variables.tf#L218) | Service account email. Unused if service account is auto-created. | <code>string</code> | | <code>null</code> |
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| [service_account_create](variables.tf#L224) | Auto-create service account. | <code>bool</code> | | <code>false</code> |
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| [service_account_scopes](variables.tf#L232) | Scopes applied to service account. | <code>list(string)</code> | | <code>[]</code> |
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| [shielded_config](variables.tf#L238) | Shielded VM configuration of the instances. | <code title="object({ enable_secure_boot = bool enable_vtpm = bool enable_integrity_monitoring = bool })">object({…})</code> | | <code>null</code> |
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| [tag_bindings](variables.tf#L248) | Tag bindings for this instance, in key => tag value id format. | <code>map(string)</code> | | <code>null</code> |
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| [tags](variables.tf#L254) | Instance network tags for firewall rule targets. | <code>list(string)</code> | | <code>[]</code> |
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| [options](variables.tf#L187) | Instance options. | <code title="object({ allow_stopping_for_update = bool deletion_protection = bool preemptible = bool spot = bool })">object({…})</code> | | <code title="{ allow_stopping_for_update = true deletion_protection = false preemptible = false spot = false }">{…}</code> |
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| [scratch_disks](variables.tf#L212) | Scratch disks configuration. | <code title="object({ count = number interface = string })">object({…})</code> | | <code title="{ count = 0 interface = "NVME" }">{…}</code> |
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| [service_account](variables.tf#L224) | Service account email. Unused if service account is auto-created. | <code>string</code> | | <code>null</code> |
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| [service_account_create](variables.tf#L230) | Auto-create service account. | <code>bool</code> | | <code>false</code> |
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| [service_account_scopes](variables.tf#L238) | Scopes applied to service account. | <code>list(string)</code> | | <code>[]</code> |
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| [shielded_config](variables.tf#L244) | Shielded VM configuration of the instances. | <code title="object({ enable_secure_boot = bool enable_vtpm = bool enable_integrity_monitoring = bool })">object({…})</code> | | <code>null</code> |
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| [tag_bindings](variables.tf#L254) | Tag bindings for this instance, in key => tag value id format. | <code>map(string)</code> | | <code>null</code> |
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| [tags](variables.tf#L260) | Instance network tags for firewall rule targets. | <code>list(string)</code> | | <code>[]</code> |
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## Outputs
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@ -215,6 +215,7 @@ resource "google_compute_instance" "default" {
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automatic_restart = !var.options.preemptible
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on_host_maintenance = local.on_host_maintenance
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preemptible = var.options.preemptible
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provisioning_model = var.options.spot ? "SPOT" : null
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}
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dynamic "scratch_disk" {
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@ -341,6 +342,7 @@ resource "google_compute_instance_template" "default" {
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automatic_restart = !var.options.preemptible
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on_host_maintenance = local.on_host_maintenance
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preemptible = var.options.preemptible
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provisioning_model = var.options.spot ? "SPOT" : null
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}
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service_account {
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@ -190,11 +190,17 @@ variable "options" {
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allow_stopping_for_update = bool
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deletion_protection = bool
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preemptible = bool
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spot = bool
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})
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default = {
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allow_stopping_for_update = true
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deletion_protection = false
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preemptible = false
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spot = false
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}
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validation {
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condition = !var.options.spot || (var.options.spot && var.options.preemptible)
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error_message = "Variable var.option.preemptible should be `true` when var.options.spot is set to `true`."
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}
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}
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