Google Compute Engine Attached Disk

This page shows how to write Terraform for Compute Engine Attached Disk and write them securely.

google_compute_attached_disk (Terraform)

The Attached Disk in Compute Engine can be configured in Terraform with the resource name google_compute_attached_disk. The following sections describe how to use the resource and its parameters.

Example Usage from GitHub

An example could not be found in GitHub.

Review your Terraform file for Google best practices

Shisho Cloud, our free checker to make sure your Terraform configuration follows best practices, is available (beta).


Specifies a unique device name of your choice that is reflected into the /dev/disk/by-id/google-* tree of a Linux operating system running within the instance. This name can be used to reference the device for mounting, resizing, and so on, from within the instance. If not specified, the server chooses a default device name to apply to this disk, in the form persistent-disks-x, where x is a number assigned by Google Compute Engine.

name or self_link of the disk that will be attached.

name or self_link of the compute instance that the disk will be attached to. If the self_link is provided then zone and project are extracted from the self link. If only the name is used then zone and project must be defined as properties on the resource or provider.

The mode in which to attach this disk, either READ_WRITE or READ_ONLY. If not specified, the default is to attach the disk in READ_WRITE mode.

The project that the referenced compute instance is a part of. If instance is referenced by its self_link the project defined in the link will take precedence.

  • zone optional computed - string

The zone that the referenced compute instance is located within. If instance is referenced by its self_link the zone defined in the link will take precedence.

Explanation in Terraform Registry

Persistent disks can be attached to a compute instance using the attached_disk section within the compute instance configuration. However there may be situations where managing the attached disks via the compute instance config isn't preferable or possible, such as attaching dynamic numbers of disks using the count variable. To get more information about attaching disks, see:

Tips: Best Practices for The Other Google Compute Engine Resources

In addition to the google_compute_disk, Google Compute Engine has the other resources that should be configured for security reasons. Please check some examples of those resources and precautions.



Ensure the encryption key for your GCE disk is stored securely

It is better to store the encryption key for your GCE disk securely. Secret Manager could be used instead.



Ensure your VPC firewall blocks unwanted outbound traffic

It is better to block unwanted outbound traffic not to expose resources in the VPC to unwanted attacks.



Ensure appropriate service account is assigned to your GCE instance

It is better to create a custom service account for the instance and assign it.



Ensure OS login for your GCE instances is enabled at project level

It is better to enable OS login for your GCE instances. Enabling OS login ensures that SSH keys used to connect to instances are mapped with IAM users, allowing centralized and automated SSH key management.



Ensure to use modern TLS protocols

It's better to adopt TLS v1.2+ instead of outdated TLS protocols.



Ensure VPC flow logging is enabled

It is better to enable VPC flow logging. VPC flow logging allows us to audit traffic in your network.

Review your Google Compute Engine settings

In addition to the above, there are other security points you should be aware of making sure that your .tf files are protected in Shisho Cloud.

Frequently asked questions

What is Google Compute Engine Attached Disk?

Google Compute Engine Attached Disk is a resource for Compute Engine of Google Cloud Platform. Settings can be wrote in Terraform.


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