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Compute Cloud API, gRPC: InstanceService.AttachFilesystem

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Updated at June 1, 2026

Attaches the filesystem to the instance.
The instance and the filesystem must reside in the same availability zone.
To use the instance with an attached filesystem, the latter must be mounted.
For details, see documentation.

gRPC request

rpc AttachFilesystem (AttachInstanceFilesystemRequest) returns (operation.Operation)

AttachInstanceFilesystemRequest

{
  "instance_id": "string",
  "attached_filesystem_spec": {
    "mode": "Mode",
    "device_name": "string",
    "filesystem_id": "string"
  }
}

Field

Description

instance_id

string

ID of the instance to attach the filesystem to.
To get the instance ID, make a InstanceService.List request.
The length must be less than or equal to 50.
This field is required.

attached_filesystem_spec

AttachedFilesystemSpec

Filesystem to attach to the instance.
This field is required.

AttachedFilesystemSpec

Field

Description

mode

enum Mode

Mode of access to the filesystem that should be attached.

  • READ_ONLY: Read-only access.
  • READ_WRITE: Read/Write access. Default value.

device_name

string

Name of the device representing the filesystem on the instance.
The name should be used for referencing the filesystem from within the instance
when it's being mounted, resized etc.
If not specified, a random value will be generated.
The value must match the regular expression: [a-z][a-z0-9-_]{,19}.

filesystem_id

string

ID of the filesystem that should be attached.
The length must be less than or equal to 50.

operation.Operation

{
  "id": "string",
  "description": "string",
  "created_at": "google.protobuf.Timestamp",
  "created_by": "string",
  "modified_at": "google.protobuf.Timestamp",
  "done": "bool",
  "metadata": "google.protobuf.Any",
  // Includes only one of the fields `error`, `response`
  "error": "google.rpc.Status",
  "response": "google.protobuf.Any"
  // end of the list of possible fields
}

An Operation resource. For more information, see Operation.

Field

Description

id

string

ID of the operation.

description

string

Description of the operation. 0-256 characters long.

created_at

google.protobuf.Timestamp

Creation timestamp.

created_by

string

ID of the user or service account who initiated the operation.

modified_at

google.protobuf.Timestamp

The time when the Operation resource was last modified.

done

bool

If the value is false, it means the operation is still in progress.
If true, the operation is completed, and either error or response is available.

metadata

google.protobuf.Any

Service-specific metadata associated with the operation.
It typically contains the ID of the target resource that the operation is performed on.
Any method that returns a long-running operation should document the metadata type, if any.

error

google.rpc.Status

The error result of the operation in case of failure or cancellation.

Includes only one of the fields error, response.

The operation result.
If done == false and there was no failure detected, neither error nor response is set.
If done == false and there was a failure detected, error is set.
If done == true, exactly one of error or response is set.

response

google.protobuf.Any

The normal response of the operation in case of success.
If the original method returns no data on success, such as Delete,
the response is google.protobuf.Empty.
If the original method is the standard Create/Update,
the response should be the target resource of the operation.
Any method that returns a long-running operation should document the response type, if any.

Includes only one of the fields error, response.

The operation result.
If done == false and there was no failure detected, neither error nor response is set.
If done == false and there was a failure detected, error is set.
If done == true, exactly one of error or response is set.
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