AWS CLI Command Reference

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[ aws . greengrassv2 ]

describe-component

Description

Retrieves metadata for a version of a component.

See also: AWS API Documentation

Synopsis

  describe-component
--arn <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]

Options

--arn (string)

The ARN of the component version.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI 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.

--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. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command's default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination.

--output (string)

The formatting style for command output.

  • json
  • text
  • table

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

  • on
  • off
  • auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.

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 .

To describe a component version

The following describe-component example describes a Hello World component.

aws greengrassv2 describe-component \
    --arn arn:aws:greengrass:us-west-2:123456789012:components:com.example.HelloWorld:versions:1.0.0

Output:

{
    "arn": "arn:aws:greengrass:us-west-2:123456789012:components:com.example.HelloWorld:versions:1.0.0",
    "componentName": "com.example.HelloWorld",
    "componentVersion": "1.0.0",
    "creationTimestamp": "2021-01-07T17:12:11.133000-08:00",
    "publisher": "Amazon",
    "description": "My first AWS IoT Greengrass component.",
    "status": {
        "componentState": "DEPLOYABLE",
        "message": "NONE",
        "errors": {}
    },
    "platforms": [
        {
            "attributes": {
                "os": "linux"
            }
        }
    ]
}

For more information, see Manage components in the AWS IoT Greengrass V2 Developer Guide.

Output

arn -> (string)

The ARN of the component version.

componentName -> (string)

The name of the component.

componentVersion -> (string)

The version of the component.

creationTimestamp -> (timestamp)

The time at which the component was created, expressed in ISO 8601 format.

publisher -> (string)

The publisher of the component version.

description -> (string)

The description of the component version.

status -> (structure)

The status of the component version in IoT Greengrass V2. This status is different from the status of the component on a core device.

componentState -> (string)

The state of the component version.

message -> (string)

A message that communicates details, such as errors, about the status of the component version.

errors -> (map)

A dictionary of errors that communicate why the component version is in an error state. For example, if IoT Greengrass can't access an artifact for the component version, then errors contains the artifact's URI as a key, and the error message as the value for that key.

key -> (string)

value -> (string)

vendorGuidance -> (string)

The vendor guidance state for the component version. This state indicates whether the component version has any issues that you should consider before you deploy it. The vendor guidance state can be:

  • ACTIVE – This component version is available and recommended for use.
  • DISCONTINUED – This component version has been discontinued by its publisher. You can deploy this component version, but we recommend that you use a different version of this component.
  • DELETED – This component version has been deleted by its publisher, so you can't deploy it. If you have any existing deployments that specify this component version, those deployments will fail.

vendorGuidanceMessage -> (string)

A message that communicates details about the vendor guidance state of the component version. This message communicates why a component version is discontinued or deleted.

platforms -> (list)

The platforms that the component version supports.

(structure)

Contains information about a platform that a component supports.

name -> (string)

The friendly name of the platform. This name helps you identify the platform.

If you omit this parameter, IoT Greengrass creates a friendly name from the os and architecture of the platform.

attributes -> (map)

A dictionary of attributes for the platform. The IoT Greengrass Core software defines the os and architecture by default. You can specify additional platform attributes for a core device when you deploy the Greengrass nucleus component. For more information, see the Greengrass nucleus component in the IoT Greengrass V2 Developer Guide .

key -> (string)

value -> (string)

tags -> (map)

A list of key-value pairs that contain metadata for the resource. For more information, see Tag your resources in the IoT Greengrass V2 Developer Guide .

key -> (string)

value -> (string)