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---
layout: "google"
page_title: "Google: google_compute_instance"
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sidebar_current: "docs-google-compute-instance"
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description: |-
Manages a VM instance resource within GCE.
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---
# google\_compute\_instance
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Manages a VM instance resource within GCE. For more information see
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[the official documentation ](https://cloud.google.com/compute/docs/instances )
and
[API ](https://cloud.google.com/compute/docs/reference/latest/instances ).
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## Example Usage
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```js
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resource "google_compute_instance" "default" {
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name = "test"
machine_type = "n1-standard-1"
zone = "us-central1-a"
tags = ["foo", "bar"]
disk {
image = "debian-7-wheezy-v20160301"
}
// 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"]
}
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}
```
## Argument Reference
The following arguments are supported:
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* `disk` - (Required) Disks to attach to the instance. This can be specified
multiple times for multiple disks. Structure is documented below.
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* `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 )
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* `name` - (Required) A unique name for the resource, required by GCE.
Changing this forces a new resource to be created.
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* `zone` - (Required) The zone that the machine should be created in.
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- - -
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* `can_ip_forward` - (Optional) Whether to allow sending and receiving of
packets with non-matching source or destination IPs.
This defaults to false.
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* `description` - (Optional) A brief description of this resource.
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* `metadata` - (Optional) Metadata key/value pairs to make available from
within the instance.
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* `metadata_startup_script` - (Optional) An alternative to using the
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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.
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* `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.
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* `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.
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* `service_account` - (Optional) Service account to attach to the instance.
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Structure is documented below.
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* `tags` - (Optional) Tags to attach to the instance.
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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).
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* `disk` - The name of the existing disk (such as those managed by
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`google_compute_disk` ) to attach.
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* `image` - The image from which to initialize this
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disk. Either the full URL, a contraction of the form "project/name", an
[image family ](https://cloud.google.com/compute/docs/images#image_families ),
or just a name (in which case the current project is used).
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* `auto_delete` - (Optional) Whether or not the disk should be auto-deleted.
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This defaults to true. Leave true for local SSDs.
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* `type` - (Optional) The GCE disk type, e.g. pd-standard, pd-ssd, or local-ssd.
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* `scratch` - (Optional) Whether the disk is a scratch disk as opposed to a
persistent disk (required for local-ssd).
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* `size` - (Optional) The size of the image in gigabytes. If not specified, it
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will inherit the size of its base image. Do not specify for local SSDs as
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their size is fixed.
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* `device_name` - (Optional) Name with which attached disk will be accessible
under `/dev/disk/by-id/`
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The `network_interface` block supports:
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* `network` - (Optional) The name of the network to attach this interface to.
Either `network` or `subnetwork` must be provided.
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* `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.
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* `address` - (Optional) The private IP address to assign to the instance. If
empty, the address will be automatically assigned.
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* `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
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not work unless you are running Terraform can send traffic to the instance's
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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.
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The `access_config` block supports:
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* `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.
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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.
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(DEPRECATED) The `network` block supports:
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* `source` - (Required) The name of the network to attach this interface to.
* `address` - (Optional) The IP address of a reserved IP address to assign
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to this interface.
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The `scheduling` block supports:
* `preemptible` - (Optional) Is the instance preemptible.
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* `on_host_maintenance` - (Optional) Describes maintenance behavior for the
instance. Can be MIGRATE or TERMINATE, for more info, read
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[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).
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## Attributes Reference
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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.
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* `tags_fingerprint` - The unique fingerprint of the tags.
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* `network_interface.0.address` - The internal ip address of the instance, either manually or dynamically assigned.
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* `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).