Amazon Elastic Compute Cloud
CLI Reference (API Version 2014-06-15)
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ec2-attach-volume

Description

Attaches an Amazon EBS volume to a running or stopped instance and exposes it to the instance with the specified device name.

Encrypted Amazon EBS volumes can be attached only to instances that support Amazon EBS encryption. For more information, see Amazon EBS encryption in the Amazon Elastic Compute Cloud User Guide for Linux.

For a list of supported device names, see Attaching the Volume to an Instance. Any device names that aren't reserved for instance store volumes can be used for Amazon EBS volumes. For more information, see Amazon EC2 Instance Store in the Amazon Elastic Compute Cloud User Guide for Linux.

Note

If a volume has an AWS Marketplace product code:

  • The volume can be attached only to the root device of a stopped instance.

  • AWS Marketplace product codes are copied from the volume to the instance.

  • You must be subscribed to the product.

  • The instance type and operating system of the instance must support the product. For example, you can't detach a volume from a Windows instance and attach it to a Linux instance.

For an overview of the AWS Marketplace, see Introducing AWS Marketplace.

The short version of this command is ec2attvol.

Syntax

ec2-attach-volume volume_id --instance instance_id --device device

Options

NameDescription

volume_id

The ID of the volume. The volume and instance must be in the same Availability Zone.

Type: String

Default: None

Required: Yes

Example: vol-4d826724

-i, --instance instance_id

The ID of the instance. The instance and volume must be in the same Availability Zone.

Type: String

Default: None

Required: Yes

Example: -i i-6058a509

-d, --device device

The device name to expose to the instance (for example, /dev/sdh or xvdh).

Type: String

Default: None

Required: Yes

Example: -d /dev/sdf (for Linux/UNIX) or -d xvdf (for Windows)

Common Options

OptionDescription

--region region

The region. Overrides the default region, the region specified by the EC2_URL environment variable, and the URL specified by the -U option.

Default: The region specified by the EC2_URL environment variable, or us-east-1 if EC2_URL isn't set.

-U, --url url

The uniform resource locator (URL) of the Amazon EC2 web service entry point.

Default: The endpoint specified by the EC2_URL environment variable, or https://ec2.amazonaws.com if EC2_URL isn't set.

-O, --aws-access-key aws_access_key_id

Your access key ID. For more information, see Tell the Tools Who You Are.

Default: The value of the AWS_ACCESS_KEY environment variable. If AWS_ACCESS_KEY isn't set, you must specify this option.

Example: -O AKIAIOSFODNN7EXAMPLE

-W, --aws-secret-key aws_secret_access_key

Your secret access key.

Default: The value of the AWS_SECRET_KEY environment variable. If AWS_SECRET_KEY isn't set, you must specify this option.

Example: -W wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY

-T, --security-token delegation_token

The AWS delegation token.

Default: The value of the environment variable (if set).

--connection-timeout timeout

The connection timeout, in seconds.

Example: --connection-timeout 30

--request-timeout timeout

The request timeout, in seconds.

Example: --request-timeout 45

-H, --headers

Includes column headers in the command output.

--show-empty-fields

Shows empty columns as (nil).

--hide-tags

Omits tags for tagged resources.

--debug

Displays internal debugging information. This can assist us when helping you troubleshooting problems.

-D, --auth-dry-run

Checks whether you have the required permissions for the command, without actually running the command. If you have the required permissions, the command returns DryRunOperation; otherwise, it returns UnauthorizedOperation.

-v, --verbose

Displays verbose output, including the API request and response on the command line. This is useful if you are building tools to talk directly to the Query API.

-

Reads arguments from standard input. This is useful when piping the output from one command to the input of another.

Example: ec2-describe-instances | grep stopped | cut -f 2 | ec2-start-instances -

-?, --help, -h

Displays usage information for the command.

Deprecated Options

We have deprecated the SOAP API for Amazon EC2. For more information, see SOAP Requests. From version 1.6.14.0 onwards of the Amazon EC2 CLI tools, the private key (-K, --private-key) and X.509 certificate (-C, --cert) options are not supported. Use your access key ID (-O, --aws-access-key) and secret access key (-W, --aws-secret-key) instead. For more information, see Setting Up the Amazon EC2 CLI and AMI Tools.

OptionDescription

-K, --private-key ec2_private_key

The private key to use when constructing requests to Amazon EC2.

Default: The value of the EC2_PRIVATE_KEY environment variable.

Example: -K pk-HKZYKTAIG2ECMXYIBH3HXV4ZBEXAMPLE.pem

-C, --cert ec2_cert

The X.509 certificate to use when constructing requests to Amazon EC2.

Default: The value of the EC2_CERT environment variable.

Example: -C cert-HKZYKTAIG2ECMXYIBH3HXV4ZBEXAMPLE.pem

Output

This command returns a table that contains the following information:

  • The ATTACHMENT identifier

  • The ID of the volume

  • The ID of the instance

  • The device name

  • The attachment state of the volume (attaching | attached | detaching | detached)

  • The time stamp when the attachment initiated

  • Whether the volume is set to delete on termination (true or false)

Amazon EC2 command line tools display errors using stderr.

Examples

Example

This example command attaches the volume with the ID vol-1a2b3c4d to the instance with the ID i-1a2b3c4d and exposes it as /dev/sdh.

PROMPT> ec2-attach-volume vol-1a2b3c4d -i i-1a2b3c4d -d /dev/sdh
ATTACHMENT	vol-1a2b3c4d	i-1a2b3c4d	/dev/sdh	attaching	YYYY-MM-DDTHH:MM:SS+0000