[ aws . greengrassv2 ]

describe-component

Description

Retrieves metadata for a version of a component.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  describe-component
--arn <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--arn (string)

The ARN of the component version.

--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

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

componentState -> (string)

The state of the component.

message -> (string)

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

errors -> (map)

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

key -> (string)

value -> (string)

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, AWS IoT Greengrass creates a friendly name from the os and architecture of the platform.

attributes -> (map)

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

key -> (string)

value -> (string)