terraform/website/source/docs/providers/google/r/compute_instance.html.markdown

---
layout: "google"
page_title: "Google: google_compute_instance"
sidebar_current: "docs-google-compute-instance"
description: |-
  Manages a VM instance resource within GCE.
---

# google\_compute\_instance

Manages a VM instance resource within GCE. For more information see
[the official documentation](https://cloud.google.com/compute/docs/instances)
and
[API](https://cloud.google.com/compute/docs/reference/latest/instances).


## Example Usage

```js
resource "google_compute_instance" "default" {
  name         = "test"
  machine_type = "n1-standard-1"
  zone         = "us-central1-a"

  tags = ["foo", "bar"]

  disk {
    image = "debian-cloud/debian-8"
  }

  // Local SSD disk
  disk {
    type    = "local-ssd"
    scratch = true
  }

  network_interface {
    network = "default"
    access_config {
      // Ephemeral IP
    }
  }

  metadata {
    foo = "bar"
  }

  metadata_startup_script = "echo hi > /test.txt"

  service_account {
    scopes = ["userinfo-email", "compute-ro", "storage-ro"]
  }
}
```

## Argument Reference

The following arguments are supported:

* `disk` - (Required) Disks to attach to the instance. This can be specified
    multiple times for multiple disks. Structure is documented below.

* `machine_type` - (Required) The machine type to create. To create a custom
    machine type, value should be set as specified
    [here](https://cloud.google.com/compute/docs/reference/latest/instances#machineType)

* `name` - (Required) A unique name for the resource, required by GCE.
    Changing this forces a new resource to be created.

* `zone` - (Required) The zone that the machine should be created in.

- - -

* `can_ip_forward` - (Optional) Whether to allow sending and receiving of
    packets with non-matching source or destination IPs.
    This defaults to false.

* `description` - (Optional) A brief description of this resource.

* `metadata` - (Optional) Metadata key/value pairs to make available from
    within the instance.

* `metadata_startup_script` - (Optional) An alternative to using the
    startup-script metadata key, except this one forces the instance to be
    recreated (thus re-running the script) if it is changed. This replaces the
    startup-script metadata key on the created instance and thus the two
    mechanisms are not allowed to be used simultaneously.

* `network_interface` - (Required) Networks to attach to the instance. This can
    be specified multiple times for multiple networks, but GCE is currently
    limited to just 1. Structure is documented below.

* `network` - (DEPRECATED, Required) Networks to attach to the instance. This
    can be specified multiple times for multiple networks. Structure is
    documented below.

* `project` - (Optional) The project in which the resource belongs. If it
    is not provided, the provider project is used.

* `scheduling` - (Optional) The scheduling strategy to use. More details about
    this configuration option are detailed below.

* `service_account` - (Optional) Service account to attach to the instance.
    Structure is documented below.

* `tags` - (Optional) Tags to attach to the instance.

The `disk` block supports: (Note that either disk or image is required, unless
the type is "local-ssd", in which case scratch must be true).

* `disk` - The name of the existing disk (such as those managed by
    `google_compute_disk`) to attach.

* `image` - The image from which to initialize this
    disk. Either the full URL, a contraction of the form "project/name", the
    name of a Google-supported
    [image family](https://cloud.google.com/compute/docs/images#image_families),
    or simple the name of an image or image family (in which case the current
    project is used).

* `auto_delete` - (Optional) Whether or not the disk should be auto-deleted.
    This defaults to true. Leave true for local SSDs.

* `type` - (Optional) The GCE disk type, e.g. pd-standard, pd-ssd, or local-ssd.

* `scratch` - (Optional) Whether the disk is a scratch disk as opposed to a
    persistent disk (required for local-ssd).

* `size` - (Optional) The size of the image in gigabytes. If not specified, it
    will inherit the size of its base image. Do not specify for local SSDs as
    their size is fixed.

* `device_name` - (Optional) Name with which attached disk will be accessible
    under `/dev/disk/by-id/`

The `network_interface` block supports:

* `network` - (Optional) The name or self_link of the network to attach this interface to.
    Either `network` or `subnetwork` must be provided.

*  `subnetwork` - (Optional) the name of the subnetwork to attach this interface
    to. The subnetwork must exist in the same region this instance will be
    created in. Either `network` or `subnetwork` must be provided.

* `address` - (Optional) The private IP address to assign to the instance. If
    empty, the address will be automatically assigned.

* `access_config` - (Optional) Access configurations, i.e. IPs via which this
    instance can be accessed via the Internet. Omit to ensure that the instance
    is not accessible from the Internet (this means that ssh provisioners will
    not work unless you are running Terraform can send traffic to the instance's
    network (e.g. via tunnel or because it is running on another cloud instance
    on that network). This block can be repeated multiple times. Structure
    documented below.

The `access_config` block supports:

* `nat_ip` - (Optional) The IP address that will be 1:1 mapped to the instance's
    network ip. If not given, one will be generated.

The `service_account` block supports:

* `email` - (Optional) The service account e-mail address. If not given, the
    default Google Compute Engine service account is used.

* `scopes` - (Required) A list of service scopes. Both OAuth2 URLs and gcloud
    short names are supported.

(DEPRECATED) The `network` block supports:

* `source` - (Required) The name of the network to attach this interface to.

* `address` - (Optional) The IP address of a reserved IP address to assign
    to this interface.

The `scheduling` block supports:

* `preemptible` - (Optional) Is the instance preemptible.

* `on_host_maintenance` - (Optional) Describes maintenance behavior for the
    instance. Can be MIGRATE or TERMINATE, for more info, read
    [here](https://cloud.google.com/compute/docs/instances/setting-instance-scheduling-options)

* `automatic_restart` - (Optional) Specifies if the instance should be
    restarted if it was terminated by Compute Engine (not a user).

## Attributes Reference

In addition to the arguments listed above, the following computed attributes are
exported:

* `metadata_fingerprint` - The unique fingerprint of the metadata.

* `self_link` - The URI of the created resource.

* `tags_fingerprint` - The unique fingerprint of the tags.

* `network_interface.0.address` - The internal ip address of the instance, either manually or dynamically assigned.

* `network_interface.0.access_config.0.assigned_nat_ip` - If the instance has an access config, either the given external ip (in the `nat_ip` field) or the ephemeral (generated) ip (if you didn't provide one).