[ aws . ec2 ]

modify-instance-metadata-options

Description

Modify the instance metadata parameters on a running or stopped instance. When you modify the parameters on a stopped instance, they are applied when the instance is started. When you modify the parameters on a running instance, the API responds with a state of “pending”. After the parameter modifications are successfully applied to the instance, the state of the modifications changes from “pending” to “applied” in subsequent describe-instances API calls. For more information, see Instance metadata and user data in the Amazon EC2 User Guide .

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  modify-instance-metadata-options
--instance-id <value>
[--http-tokens <value>]
[--http-put-response-hop-limit <value>]
[--http-endpoint <value>]
[--dry-run | --no-dry-run]
[--http-protocol-ipv6 <value>]
[--instance-metadata-tags <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--instance-id (string)

The ID of the instance.

--http-tokens (string)

The state of token usage for your instance metadata requests. If the parameter is not specified in the request, the default state is optional .

If the state is optional , you can choose to retrieve instance metadata with or without a signed token header on your request. If you retrieve the IAM role credentials without a token, the version 1.0 role credentials are returned. If you retrieve the IAM role credentials using a valid signed token, the version 2.0 role credentials are returned.

If the state is required , you must send a signed token header with any instance metadata retrieval requests. In this state, retrieving the IAM role credential always returns the version 2.0 credentials; the version 1.0 credentials are not available.

Possible values:

  • optional

  • required

--http-put-response-hop-limit (integer)

The desired HTTP PUT response hop limit for instance metadata requests. The larger the number, the further instance metadata requests can travel. If no parameter is specified, the existing state is maintained.

Possible values: Integers from 1 to 64

--http-endpoint (string)

Enables or disables the HTTP metadata endpoint on your instances. If this parameter is not specified, the existing state is maintained.

If you specify a value of disabled , you cannot access your instance metadata.

Possible values:

  • disabled

  • enabled

--dry-run | --no-dry-run (boolean)

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation . Otherwise, it is UnauthorizedOperation .

--http-protocol-ipv6 (string)

Enables or disables the IPv6 endpoint for the instance metadata service. This setting applies only if you have enabled the HTTP metadata endpoint.

Possible values:

  • disabled

  • enabled

--instance-metadata-tags (string)

Set to enabled to allow access to instance tags from the instance metadata. Set to disabled to turn off access to instance tags from the instance metadata. For more information, see Work with instance tags using the instance metadata .

Default: disabled

Possible values:

  • disabled

  • enabled

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

Example 1: To enable IMDSv2

The following modify-instance-metadata-options example configures the use of IMDSv2 on the specified instance.

aws ec2 modify-instance-metadata-options \
    --instance-id i-1234567898abcdef0 \
    --http-tokens required \
    --http-endpoint enabled

Output:

{
    "InstanceId": "i-1234567898abcdef0",
    "InstanceMetadataOptions": {
        "State": "pending",
        "HttpTokens": "required",
        "HttpPutResponseHopLimit": 1,
        "HttpEndpoint": "enabled"
    }
}

For more information, see Instance metadata and user data in the Amazon Elastic Compute Cloud User Guide for Linux Instances.

Example 2: To disable instance metadata

The following modify-instance-metadata-options example disables the use of all versions of instance metadata on the specified instance.

aws ec2 modify-instance-metadata-options \
    --instance-id i-1234567898abcdef0 \
    --http-endpoint disabled

Output:

{
    "InstanceId": "i-1234567898abcdef0",
    "InstanceMetadataOptions": {
        "State": "pending",
        "HttpTokens": "required",
        "HttpPutResponseHopLimit": 1,
        "HttpEndpoint": "disabled"
    }
}

For more information, see Instance metadata and user data in the Amazon Elastic Compute Cloud User Guide for Linux Instances.

Example 3: To enable instance metadata IPv6 endpoint for your instance

The following modify-instance-metadata-options example shows you how to turn on the IPv6 endpoint for the instance metadata service.

aws ec2 modify-instance-metadata-options \
    --instance-id i-1234567898abcdef0 \
    --http-protocol-ipv6 enabled \
    --http-endpoint enabled

Output:

{
    "InstanceId": "i-1234567898abcdef0",
    "InstanceMetadataOptions": {
        "State": "pending",
        "HttpTokens": "required",
        "HttpPutResponseHopLimit": 1,
        "HttpEndpoint": "enabled",
        HttpProtocolIpv6": "enabled"
    }
}

By default, the IPv6 endpoint is disabled. This is true even if you have launched an instance into an IPv6-only subnet. The IPv6 endpoint for IMDS is only accessible on instances built on the Nitro System. For more information, see Instance metadata and user data in the Amazon Elastic Compute Cloud User Guide for Linux Instances.

Output

InstanceId -> (string)

The ID of the instance.

InstanceMetadataOptions -> (structure)

The metadata options for the instance.

State -> (string)

The state of the metadata option changes.

pending - The metadata options are being updated and the instance is not ready to process metadata traffic with the new selection.

applied - The metadata options have been successfully applied on the instance.

HttpTokens -> (string)

The state of token usage for your instance metadata requests.

If the state is optional , you can choose to retrieve instance metadata with or without a signed token header on your request. If you retrieve the IAM role credentials without a token, the version 1.0 role credentials are returned. If you retrieve the IAM role credentials using a valid signed token, the version 2.0 role credentials are returned.

If the state is required , you must send a signed token header with any instance metadata retrieval requests. In this state, retrieving the IAM role credential always returns the version 2.0 credentials; the version 1.0 credentials are not available.

Default: optional

HttpPutResponseHopLimit -> (integer)

The desired HTTP PUT response hop limit for instance metadata requests. The larger the number, the further instance metadata requests can travel.

Default: 1

Possible values: Integers from 1 to 64

HttpEndpoint -> (string)

Indicates whether the HTTP metadata endpoint on your instances is enabled or disabled.

If the value is disabled , you cannot access your instance metadata.

HttpProtocolIpv6 -> (string)

Indicates whether the IPv6 endpoint for the instance metadata service is enabled or disabled.

InstanceMetadataTags -> (string)

Indicates whether access to instance tags from the instance metadata is enabled or disabled. For more information, see Work with instance tags using the instance metadata .