AWS IoT Greengrass
Developer Guide

AWS CloudFormation Support for AWS IoT Greengrass

AWS CloudFormation is a service that can help you create, manage, and replicate your AWS resources. You can use AWS CloudFormation templates to define AWS IoT Greengrass groups and the devices, subscriptions, and other components that you want to deploy. For an example, see Example Template.

The resources and infrastructure that you generate from a template is called a stack. You can define all of your resources in one template or refer to resources from other stacks. For more information about AWS CloudFormation templates and features, see What Is AWS CloudFormation? in the AWS CloudFormation User Guide.

Creating Resources

AWS CloudFormation templates are JSON or YAML documents that describe the properties and relationships of AWS resources. The following AWS IoT Greengrass resources are supported:

  • Groups

  • Cores

  • Devices

  • Lambda functions

  • Connectors

  • Resources (local, machine learning, and secret)

  • Subscriptions

  • Loggers (logging configurations)

In AWS CloudFormation templates, the structure and syntax of Greengrass resources are based on the AWS IoT Greengrass API. For example, the example template associates a top-level DeviceDefinition with a DeviceDefinitionVersion that contains an individual device. For more information, see Overview of the AWS IoT Greengrass Group Object Model.

The AWS IoT Greengrass Resource Types Reference in the AWS CloudFormation User Guide describes the Greengrass resources that you can manage with AWS CloudFormation. When you use AWS CloudFormation templates to create Greengrass resources, we recommend that you manage them only from AWS CloudFormation. For example, you should update your template if you want to add, change, or remove a device (instead of using the AWS IoT Greengrass API or AWS IoT console). This allows you to use rollback and other AWS CloudFormation change management features. For more information about using AWS CloudFormation to create and manage your resources and stacks, see Working with Stacks in the AWS CloudFormation User Guide.

For a walkthrough that shows how to create and deploy AWS IoT Greengrass resources in an AWS CloudFormation template, see Automating AWS IoT Greengrass Setup with AWS CloudFormation on The Internet of Things on AWS Official Blog.

Deploying Resources

After you create an AWS CloudFormation stack that contains your group version, you can use the AWS CLI or AWS IoT console to deploy it.

Note

To deploy a group, you must have a Greengrass service role associated with your AWS account. The service role allows AWS IoT Greengrass to access your resources in AWS Lambda and other AWS services. This role should exist if you already deployed a Greengrass group in the current AWS Region. For more information, see Greengrass Service Role.

To deploy the group (AWS CLI)
  • Run the create-deployment command.

    aws greengrass create-deployment --group-id GroupId --group-version-id GroupVersionId --deployment-type NewDeployment

    Note

    The CommandToDeployGroup statement in the example template shows how to output the command with your group and group version IDs when you create a stack.

To deploy the group (console)
  1. In the AWS IoT console, choose Greengrass, and then choose Groups.

  2. Choose your group.

  3. On the group configuration page, from Actions, choose Deploy.

    
                Screenshot of the Group page with the Deploy action 
                    highlighted.

    This deploys the group configuration to your AWS IoT Greengrass core device. For troubleshooting help, see Troubleshooting AWS IoT Greengrass.

Example Template

The following example template creates a Greengrass group that contains a core, device, function, logger, subscription, and two resources. To do this, the template follows the object model of the AWS IoT Greengrass API. For example, the devices that you want to add to the group are contained in a DeviceDefinitionVersion resource, which is associated with a DeviceDefinition resource. To add the devices to the group, the group version references the ARN of the DeviceDefinitionVersion.

The template includes parameters that let you specify the certificate ARNs for the core and device and the version ARN of the source Lambda function (which is an AWS Lambda resource). It uses the Ref and GetAtt intrinsic functions to reference IDs, ARNs, and other attributes that are required to create Greengrass resources.

The template also defines two AWS IoT devices (things), which represent the core and device that are added to the Greengrass group.

After you create the stack with your Greengrass resources, you can use the AWS CLI or the AWS IoT console to deploy the group.

Note

The CommandToDeployGroup statement in the example shows how to output a complete create-deployment CLI command that you can use to deploy your group.

JSONYAML
JSON
{ "AWSTemplateFormatVersion": "2010-09-09", "Description": "AWS IoT Greengrass example template that creates a group version with a core, device, function, logger, subscription, and resources.", "Parameters": { "CoreCertificateArn": { "Type": "String" }, "DeviceCertificateArn": { "Type": "String" }, "LambdaVersionArn": { "Type": "String" } }, "Resources": { "TestCore1": { "Type": "AWS::IoT::Thing", "Properties": { "ThingName": "TestCore1" } }, "TestCoreDefinition": { "Type": "AWS::Greengrass::CoreDefinition", "Properties": { "Name": "DemoTestCoreDefinition" } }, "TestCoreDefinitionVersion": { "Type": "AWS::Greengrass::CoreDefinitionVersion", "Properties": { "CoreDefinitionId": { "Ref": "TestCoreDefinition" }, "Cores": [ { "Id": "TestCore1", "CertificateArn": { "Ref": "CoreCertificateArn" }, "SyncShadow": "false", "ThingArn": { "Fn::Join": [ ":", [ "arn:aws:iot", { "Ref": "AWS::Region" }, { "Ref": "AWS::AccountId" }, "thing/TestCore1" ] ] } } ] } }, "TestDevice1": { "Type": "AWS::IoT::Thing", "Properties": { "ThingName": "TestDevice1" } }, "TestDeviceDefinition": { "Type": "AWS::Greengrass::DeviceDefinition", "Properties": { "Name": "DemoTestDeviceDefinition" } }, "TestDeviceDefinitionVersion": { "Type": "AWS::Greengrass::DeviceDefinitionVersion", "Properties": { "DeviceDefinitionId": { "Fn::GetAtt": [ "TestDeviceDefinition", "Id" ] }, "Devices": [ { "Id": "TestDevice1", "CertificateArn": { "Ref": "DeviceCertificateArn" }, "SyncShadow": "true", "ThingArn": { "Fn::Join": [ ":", [ "arn:aws:iot", { "Ref": "AWS::Region" }, { "Ref": "AWS::AccountId" }, "thing/TestDevice1" ] ] } } ] } }, "TestFunctionDefinition": { "Type": "AWS::Greengrass::FunctionDefinition", "Properties": { "Name": "DemoTestFunctionDefinition" } }, "TestFunctionDefinitionVersion": { "Type": "AWS::Greengrass::FunctionDefinitionVersion", "Properties": { "FunctionDefinitionId": { "Fn::GetAtt": [ "TestFunctionDefinition", "Id" ] }, "DefaultConfig": { "Execution": { "IsolationMode": "GreengrassContainer" } }, "Functions": [ { "Id": "TestLambda1", "FunctionArn": { "Ref": "LambdaVersionArn" }, "FunctionConfiguration": { "Pinned": "true", "Executable": "run.exe", "ExecArgs": "argument1", "MemorySize": "512", "Timeout": "2000", "EncodingType": "binary", "Environment": { "Variables": { "variable1": "value1" }, "ResourceAccessPolicies": [ { "ResourceId": "ResourceId1", "Permission": "ro" }, { "ResourceId": "ResourceId2", "Permission": "rw" } ], "AccessSysfs": "false", "Execution": { "IsolationMode": "GreengrassContainer", "RunAs": { "Uid": "1", "Gid": "10" } } } } } ] } }, "TestLoggerDefinition": { "Type": "AWS::Greengrass::LoggerDefinition", "Properties": { "Name": "DemoTestLoggerDefinition" } }, "TestLoggerDefinitionVersion": { "Type": "AWS::Greengrass::LoggerDefinitionVersion", "Properties": { "LoggerDefinitionId": { "Ref": "TestLoggerDefinition" }, "Loggers": [ { "Id": "TestLogger1", "Type": "AWSCloudWatch", "Component": "GreengrassSystem", "Level": "INFO" } ] } }, "TestResourceDefinition": { "Type": "AWS::Greengrass::ResourceDefinition", "Properties": { "Name": "DemoTestResourceDefinition" } }, "TestResourceDefinitionVersion": { "Type": "AWS::Greengrass::ResourceDefinitionVersion", "Properties": { "ResourceDefinitionId": { "Ref": "TestResourceDefinition" }, "Resources": [ { "Id": "ResourceId1", "Name": "LocalDeviceResource", "ResourceDataContainer": { "LocalDeviceResourceData": { "SourcePath": "/dev/TestSourcePath1", "GroupOwnerSetting": { "AutoAddGroupOwner": "false", "GroupOwner": "TestOwner" } } } }, { "Id": "ResourceId2", "Name": "LocalVolumeResourceData", "ResourceDataContainer": { "LocalVolumeResourceData": { "SourcePath": "/dev/TestSourcePath2", "DestinationPath": "/volumes/TestDestinationPath2", "GroupOwnerSetting": { "AutoAddGroupOwner": "false", "GroupOwner": "TestOwner" } } } } ] } }, "TestSubscriptionDefinition": { "Type": "AWS::Greengrass::SubscriptionDefinition", "Properties": { "Name": "DemoTestSubscriptionDefinition" } }, "TestSubscriptionDefinitionVersion": { "Type": "AWS::Greengrass::SubscriptionDefinitionVersion", "Properties": { "SubscriptionDefinitionId": { "Ref": "TestSubscriptionDefinition" }, "Subscriptions": [ { "Id": "TestSubscription1", "Source": { "Fn::Join": [ ":", [ "arn:aws:iot", { "Ref": "AWS::Region" }, { "Ref": "AWS::AccountId" }, "thing/TestDevice1" ] ] }, "Subject": "TestSubjectUpdated", "Target": { "Ref": "LambdaVersionArn" } } ] } }, "TestGroup": { "Type": "AWS::Greengrass::Group", "Properties": { "Name": "DemoTestGroupNewName", "RoleArn": { "Fn::Join": [ ":", [ "arn:aws:iam:", { "Ref": "AWS::AccountId" }, "role/TestUser" ] ] }, "InitialVersion": { "CoreDefinitionVersionArn": { "Ref": "TestCoreDefinitionVersion" }, "DeviceDefinitionVersionArn": { "Ref": "TestDeviceDefinitionVersion" }, "FunctionDefinitionVersionArn": { "Ref": "TestFunctionDefinitionVersion" }, "SubscriptionDefinitionVersionArn": { "Ref": "TestSubscriptionDefinitionVersion" }, "LoggerDefinitionVersionArn": { "Ref": "TestLoggerDefinitionVersion" }, "ResourceDefinitionVersionArn": { "Ref": "TestResourceDefinitionVersion" } } } } }, "Outputs": { "CommandToDeployGroup": { "Value": { "Fn::Join": [ " ", [ "groupVersion=$(cut -d'/' -f6 <<<", { "Fn::GetAtt": [ "TestGroup", "LatestVersionArn" ] }, ");", "aws --region", { "Ref": "AWS::Region" }, "greengrass create-deployment --group-id", { "Ref": "TestGroup" }, "--deployment-type NewDeployment --group-version-id", "$groupVersion" ] ] } } } }
YAML
AWSTemplateFormatVersion: 2010-09-09 Description: >- AWS IoT Greengrass example template that creates a group version with a core, device, function, logger, subscription, and resources. Parameters: CoreCertificateArn: Type: String DeviceCertificateArn: Type: String LambdaVersionArn: Type: String Resources: TestCore1: Type: 'AWS::IoT::Thing' Properties: ThingName: TestCore1 TestCoreDefinition: Type: 'AWS::Greengrass::CoreDefinition' Properties: Name: DemoTestCoreDefinition TestCoreDefinitionVersion: Type: 'AWS::Greengrass::CoreDefinitionVersion' Properties: CoreDefinitionId: !Ref TestCoreDefinition Cores: - Id: TestCore1 CertificateArn: !Ref CoreCertificateArn SyncShadow: 'false' ThingArn: !Join - ':' - - 'arn:aws:iot' - !Ref 'AWS::Region' - !Ref 'AWS::AccountId' - thing/TestCore1 TestDevice1: Type: 'AWS::IoT::Thing' Properties: ThingName: TestDevice1 TestDeviceDefinition: Type: 'AWS::Greengrass::DeviceDefinition' Properties: Name: DemoTestDeviceDefinition TestDeviceDefinitionVersion: Type: 'AWS::Greengrass::DeviceDefinitionVersion' Properties: DeviceDefinitionId: !GetAtt - TestDeviceDefinition - Id Devices: - Id: TestDevice1 CertificateArn: !Ref DeviceCertificateArn SyncShadow: 'true' ThingArn: !Join - ':' - - 'arn:aws:iot' - !Ref 'AWS::Region' - !Ref 'AWS::AccountId' - thing/TestDevice1 TestFunctionDefinition: Type: 'AWS::Greengrass::FunctionDefinition' Properties: Name: DemoTestFunctionDefinition TestFunctionDefinitionVersion: Type: 'AWS::Greengrass::FunctionDefinitionVersion' Properties: FunctionDefinitionId: !GetAtt - TestFunctionDefinition - Id DefaultConfig: Execution: IsolationMode: GreengrassContainer Functions: - Id: TestLambda1 FunctionArn: !Ref LambdaVersionArn FunctionConfiguration: Pinned: 'true' Executable: run.exe ExecArgs: argument1 MemorySize: '512' Timeout: '2000' EncodingType: binary Environment: Variables: variable1: value1 ResourceAccessPolicies: - ResourceId: ResourceId1 Permission: ro - ResourceId: ResourceId2 Permission: rw AccessSysfs: 'false' Execution: IsolationMode: GreengrassContainer RunAs: Uid: '1' Gid: '10' TestLoggerDefinition: Type: 'AWS::Greengrass::LoggerDefinition' Properties: Name: DemoTestLoggerDefinition TestLoggerDefinitionVersion: Type: 'AWS::Greengrass::LoggerDefinitionVersion' Properties: LoggerDefinitionId: !Ref TestLoggerDefinition Loggers: - Id: TestLogger1 Type: AWSCloudWatch Component: GreengrassSystem Level: INFO TestResourceDefinition: Type: 'AWS::Greengrass::ResourceDefinition' Properties: Name: DemoTestResourceDefinition TestResourceDefinitionVersion: Type: 'AWS::Greengrass::ResourceDefinitionVersion' Properties: ResourceDefinitionId: !Ref TestResourceDefinition Resources: - Id: ResourceId1 Name: LocalDeviceResource ResourceDataContainer: LocalDeviceResourceData: SourcePath: /dev/TestSourcePath1 GroupOwnerSetting: AutoAddGroupOwner: 'false' GroupOwner: TestOwner - Id: ResourceId2 Name: LocalVolumeResourceData ResourceDataContainer: LocalVolumeResourceData: SourcePath: /dev/TestSourcePath2 DestinationPath: /volumes/TestDestinationPath2 GroupOwnerSetting: AutoAddGroupOwner: 'false' GroupOwner: TestOwner TestSubscriptionDefinition: Type: 'AWS::Greengrass::SubscriptionDefinition' Properties: Name: DemoTestSubscriptionDefinition TestSubscriptionDefinitionVersion: Type: 'AWS::Greengrass::SubscriptionDefinitionVersion' Properties: SubscriptionDefinitionId: !Ref TestSubscriptionDefinition Subscriptions: - Id: TestSubscription1 Source: !Join - ':' - - 'arn:aws:iot' - !Ref 'AWS::Region' - !Ref 'AWS::AccountId' - thing/TestDevice1 Subject: TestSubjectUpdated Target: !Ref LambdaVersionArn TestGroup: Type: 'AWS::Greengrass::Group' Properties: Name: DemoTestGroupNewName RoleArn: !Join - ':' - - 'arn:aws:iam:' - !Ref 'AWS::AccountId' - role/TestUser InitialVersion: CoreDefinitionVersionArn: !Ref TestCoreDefinitionVersion DeviceDefinitionVersionArn: !Ref TestDeviceDefinitionVersion FunctionDefinitionVersionArn: !Ref TestFunctionDefinitionVersion SubscriptionDefinitionVersionArn: !Ref TestSubscriptionDefinitionVersion LoggerDefinitionVersionArn: !Ref TestLoggerDefinitionVersion ResourceDefinitionVersionArn: !Ref TestResourceDefinitionVersion Outputs: CommandToDeployGroup: Value: !Join - ' ' - - groupVersion=$(cut -d'/' -f6 <<< - !GetAtt - TestGroup - LatestVersionArn - ); - aws --region - !Ref 'AWS::Region' - greengrass create-deployment --group-id - !Ref TestGroup - '--deployment-type NewDeployment --group-version-id' - $groupVersion

Supported AWS Regions

Currently, you can create and manage AWS IoT Greengrass resources only in the following AWS Regions:

  • US East (Ohio)

  • US East (N. Virginia)

  • US West (Oregon)

  • Asia Pacific (Mumbai)

  • Asia Pacific (Seoul)

  • Asia Pacific (Singapore)

  • Asia Pacific (Sydney)

  • Asia Pacific (Tokyo)

  • China (Beijing)

  • EU (Frankfurt)

  • EU (Ireland)

  • EU (London)

  • AWS GovCloud (US-West)