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[ aws . greengrassv2 ]

resolve-component-candidates

Description

Retrieves a list of components that meet the component, version, and platform requirements of a deployment. AWS IoT Greengrass core devices call this operation when they receive a deployment to identify the components to install.

This operation identifies components that meet all dependency requirements for a deployment. If the requirements conflict, then this operation returns an error and the deployment fails. For example, this occurs if component A requires version 2.0.0 and component B requires version 2.0.0 of a component dependency.

When you specify the component candidates to resolve, AWS IoT Greengrass compares each component's digest from the core device with the component's digest in the AWS Cloud. If the digests don't match, then AWS IoT Greengrass specifies to use the version from the AWS Cloud.

Warning

To use this operation, you must use the data plane API endpoint and authenticate with an AWS IoT device certificate. For more information, see AWS IoT Greengrass endpoints and quotas .

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.

Synopsis

  resolve-component-candidates
--platform <value>
--component-candidates <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

Options

--platform (structure)

The platform to use to resolve compatible components.

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)

Shorthand Syntax:

name=string,attributes={KeyName1=string,KeyName2=string}

JSON Syntax:

{
  "name": "string",
  "attributes": {"string": "string"
    ...}
}

--component-candidates (list)

The list of components to resolve.

(structure)

Contains information about a component that is a candidate to deploy to a AWS IoT Greengrass core device.

componentName -> (string)

The name of the component.

componentVersion -> (string)

The version of the component.

versionRequirements -> (map)

The version requirements for the component's dependencies. AWS IoT Greengrass core devices get the version requirements from component recipes.

AWS IoT Greengrass V2 uses semantic version constraints. For more information, see Semantic Versioning .

key -> (string)

value -> (string)

Shorthand Syntax:

componentName=string,componentVersion=string,versionRequirements={KeyName1=string,KeyName2=string} ...

JSON Syntax:

[
  {
    "componentName": "string",
    "componentVersion": "string",
    "versionRequirements": {"string": "string"
      ...}
  }
  ...
]

--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.

See 'aws help' for descriptions of global parameters.

Output

resolvedComponentVersions -> (list)

A list of components that meet the requirements that you specify in the request. This list includes each component's recipe that you can use to install the component.

(structure)

Contains information about a component version that is compatible to run on a AWS IoT Greengrass core device.

arn -> (string)

The ARN of the component version.

componentName -> (string)

The name of the component.

componentVersion -> (string)

The version of the component.

recipe -> (blob)

The recipe of the component version.