Merge branch 'Issue690' of github.com:awslabs/aws-solutions-construct…

…s into Issue690

DESIGN_GUIDELINES.md

@@ -347,14 +347,14 @@ Existing Inconsistencies would not be published, that’s for our internal use 
 | Name    | Type     | Description | Notes    |
 | --- | --- | --- |--- |
 | stateMachineProps	|[`sfn.StateMachineProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-stepfunctions.StateMachineProps.html)|Optional user provided props to override the default props for `sfn.StateMachine`|
-| createCloudWatchAlarms | `boolean`|Whether to create recommended CloudWatch alarms.|
+| createCloudWatchAlarms? | `boolean`|Whether to create recommended CloudWatch alarms.|
 
 **Required Construct Properties**
 
 | Name    | Type     | Description | Notes    |
 | --- | --- | --- |--- |
 | stateMachine| [`sfn.StateMachine`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-stepfunctions.StateMachine.html)|Returns an instance of `sfn.StateMachine` created by the construct.|
-| stateMachineLoggingGroup|[`logs.ILogGroup`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-logs.ILogGroup.html)|Returns an instance of the `logs.ILogGroup` created by the construct for StateMachine.|
+| stateMachineLogGroup|[`logs.ILogGroup`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-logs.ILogGroup.html)|Returns an instance of the `logs.ILogGroup` created by the construct for StateMachine.|
 | cloudwatchAlarms? | [`cloudwatch.Alarm[]`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-cloudwatch.Alarm.html)|Returns a list of `cloudwatch.Alarm` created by the construct.|
 
 ## VPC

source/patterns/@aws-solutions-constructs/aws-fargate-stepfunctions/.eslintignore

@@ -0,0 +1,4 @@
+lib/*.js
+test/*.js
+*.d.ts
+coverage

source/patterns/@aws-solutions-constructs/aws-fargate-stepfunctions/.gitignore

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+lib/*.js
+test/*.js
+*.js.map
+*.d.ts
+node_modules
+*.generated.ts
+dist
+.jsii
+
+.LAST_BUILD
+.nyc_output
+coverage
+.nycrc
+.LAST_PACKAGE
+*.snk

source/patterns/@aws-solutions-constructs/aws-fargate-stepfunctions/.npmignore

@@ -0,0 +1,21 @@
+# Exclude typescript source and config
+*.ts
+tsconfig.json
+coverage
+.nyc_output
+*.tgz
+*.snk
+*.tsbuildinfo
+
+# Include javascript files and typescript declarations
+!*.js
+!*.d.ts
+
+# Exclude jsii outdir
+dist
+
+# Include .jsii
+!.jsii
+
+# Include .jsii
+!.jsii

source/patterns/@aws-solutions-constructs/aws-fargate-stepfunctions/README.md

@@ -0,0 +1,141 @@
+# aws-fargate-stepfunctions module
+<!--BEGIN STABILITY BANNER-->
+
+---
+
+![Stability: Experimental](https://img.shields.io/badge/stability-Experimental-important.svg?style=for-the-badge)
+
+> All classes are under active development and subject to non-backward compatible changes or removal in any
+> future version. These are not subject to the [Semantic Versioning](https://semver.org/) model.
+> This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
+
+---
+<!--END STABILITY BANNER-->
+
+| **Reference Documentation**:| <span style="font-weight: normal">https://docs.aws.amazon.com/solutions/latest/constructs/</span>|
+|:-------------|:-------------|
+<div style="height:8px"></div>
+
+| **Language**     | **Package**        |
+|:-------------|-----------------|
+|![Python Logo](https://docs.aws.amazon.com/cdk/api/latest/img/python32.png) Python|`aws_solutions_constructs.aws_fargate_stepfunctions`|
+|![Typescript Logo](https://docs.aws.amazon.com/cdk/api/latest/img/typescript32.png) Typescript|`@aws-solutions-constructs/aws-fargate-stepfunctions`|
+|![Java Logo](https://docs.aws.amazon.com/cdk/api/latest/img/java32.png) Java|`software.amazon.awsconstructs.services.fargatestepfunctions`|
+
+This AWS Solutions Construct implements an AWS Fargate service that can execute an AWS Step Functions state machine
+
+Here is a minimal deployable pattern definition:
+
+Typescript
+``` typescript
+import { Construct } from 'constructs';
+import { Stack, StackProps } from 'aws-cdk-lib';
+import { FargateToStepfunctions, FargateToStepfunctionsProps } from '@aws-solutions-constructs/aws-fargate-stepfunctions';
+import * as stepfunctions from 'aws-cdk-lib/aws-stepfunctions';
+
+const startState = new stepfunctions.Pass(this, 'StartState');
+
+const constructProps: FargateToStepfunctionsProps = {
+  publicApi: true,
+  ecrRepositoryArn: "arn:aws:ecr:us-east-1:123456789012:repository/your-ecr-repo",
+  stateMachineProps: {
+      definition: startState
+    }
+};
+
+new FargateToStepfunctions(this, 'test-construct', constructProps);
+```
+
+Python
+``` python
+from aws_solutions_constructs.aws_fargate_stepfunctions import FargateToStepfunctions, FargateToStepfunctionsProps
+from aws_cdk import (
+    aws_stepfunctions as stepfunctions,
+    Stack
+)
+from constructs import Construct
+
+start_state = stepfunctions.Pass(self, 'start_state')
+
+FargateToStepfunctions(self, 'test_construct',
+            public_api=True,
+            ecr_repository_arn="arn:aws:ecr:us-east-1:123456789012:repository/your-ecr-repo",
+            state_machine_props=stepfunctions.StateMachineProps(
+              definition=start_state))
+```
+
+Java
+``` java
+import software.constructs.Construct;
+
+import software.amazon.awscdk.Stack;
+import software.amazon.awscdk.StackProps;
+import software.amazon.awsconstructs.services.fargatestepfunctions.*;
+import software.amazon.awscdk.services.stepfunctions.*;
+
+start_state = stepfunctions.Pass(self, 'start_state')
+
+new FargateToStepfunctions(this, "test-construct", new FargateToStepfunctionsProps.Builder()
+        .publicApi(true)
+        .ecrRepositoryArn("arn:aws:ecr:us-east-1:123456789012:repository/your-ecr-repo")
+        .stateMachineProps(new StateMachineProps.Builder()
+                        .definition(startState)
+                        .build()
+        .build());
+```
+
+## Pattern Construct Props
+
+| **Name**     | **Type**        | **Description** |
+|:-------------|:----------------|-----------------|
+| publicApi | `boolean` | Whether the construct is deploying a private or public API. This has implications for the VPC. |
+| vpcProps? | [`ec2.VpcProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-ec2.VpcProps.html) | Optional custom properties for a VPC the construct will create. This VPC will be used by any Private Hosted Zone the construct creates (that's why loadBalancerProps and privateHostedZoneProps can't include a VPC). Providing both this and existingVpc is an error. |
+| existingVpc? | [`ec2.IVpc`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-ec2.IVpc.html) | An existing VPC in which to deploy the construct. Providing both this and vpcProps is an error. If the client provides an existing load balancer and/or existing Private Hosted Zone, those constructs must exist in this VPC. |
+| clusterProps? | [`ecs.ClusterProps`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.ClusterProps.html) | Optional properties to create a new ECS cluster. To provide an existing cluster, use the cluster attribute of fargateServiceProps. |
+| ecrRepositoryArn? | `string` | The arn of an ECR Repository containing the image to use to generate the containers. Either this or the image property of containerDefinitionProps must be provided. format: arn:aws:ecr:*region*:*account number*:repository/*Repository Name* |
+| ecrImageVersion? | `string` | The version of the image to use from the repository. Defaults to 'Latest' |
+| containerDefinitionProps? | [`ecs.ContainerDefinitionProps \| any`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.ContainerDefinitionProps.html) | Optional props to define the container created for the Fargate Service (defaults found in fargate-defaults.ts) |
+| fargateTaskDefinitionProps? | [`ecs.FargateTaskDefinitionProps \| any`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.FargateTaskDefinitionProps.html) | Optional props to define the Fargate Task Definition for this construct  (defaults found in fargate-defaults.ts) |
+| fargateServiceProps? | [`ecs.FargateServiceProps \| any`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.FargateServiceProps.html) | Optional values to override default Fargate Task definition properties (fargate-defaults.ts). The construct will default to launching the service is the most isolated subnets available (precedence: Isolated, Private and Public). Override those and other defaults here. |
+|existingFargateServiceObject? | [`ecs.FargateService`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.FargateService.html) | A Fargate Service already instantiated (probably by another Solutions Construct). If this is specified, then no props defining a new service can be provided, including: ecrImageVersion, containerDefinitionProps, fargateTaskDefinitionProps, ecrRepositoryArn, fargateServiceProps, clusterProps |
+|existingContainerDefinitionObject? | [`ecs.ContainerDefinition`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.ContainerDefinition.html) | A container definition already instantiated as part of a Fargate service. This must be the container in the existingFargateServiceObject |
+|stateMachineProps|[`sfn.StateMachineProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-stepfunctions.StateMachineProps.html)|User provided props to override the default props for sfn.StateMachine.|
+| createCloudWatchAlarms? | `boolean`|Whether to create recommended CloudWatch alarms. Default is true.|
+|logGroupProps?|[`logs.LogGroupProps`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-logs.LogGroupProps.html)|Optional user provided props to override the default props for for the CloudWatchLogs LogGroup.|
+|stateMachineEnvironmentVariableName?|`string`|Optional name for the container environment variable containing the state machine ARN.|
+
+## Pattern Properties
+
+| **Name**     | **Type**        | **Description** |
+|:-------------|:----------------|-----------------|
+| vpc | [`ec2.IVpc`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-ec2.IVpc.html) | The VPC used by the construct (whether created by the construct or provided by the client) |
+| service | [`ecs.FargateService`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.FargateService.html) | The AWS Fargate service used by this construct (whether created by this construct or passed to this construct at initialization) |
+| container | [`ecs.ContainerDefinition`](https://docs.aws.amazon.com/cdk/api/v1/docs/@aws-cdk_aws-ecs.ContainerDefinition.html) | The container associated with the AWS Fargate service in the service property. |
+| stateMachine| [`sfn.StateMachine`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-stepfunctions.StateMachine.html)|Returns an instance of `sfn.StateMachine` created by the construct.|
+| stateMachineLogGroup|[`logs.ILogGroup`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-logs.ILogGroup.html)|Returns an instance of the `logs.ILogGroup` created by the construct for StateMachine.|
+| cloudwatchAlarms? | [`cloudwatch.Alarm[]`](https://docs.aws.amazon.com/cdk/api/latest/docs/@aws-cdk_aws-cloudwatch.Alarm.html)|Returns a list of `cloudwatch.Alarm` created by the construct.|
+
+## Default settings
+
+Out of the box implementation of the Construct without any override will set the following defaults:
+
+### AWS Fargate Service
+* Sets up an AWS Fargate service
+  * Uses the existing service if provided
+  * Creates a new service if none provided.
+    * Service will run in isolated subnets if available, then private subnets if available and finally public subnets
+* Adds an environment variable to the container containing the ARN of the state machine
+  * Default name is `STATE_MACHINE_ARN`
+* Add permissions to the container IAM role allowing it to start the execution of a state machine
+
+### AWS Step Functions
+* Sets up an AWS Step Functions state machine
+  * Uses an existing state machine if one is provided, otherwise creates a new one
+* Adds an Interface Endpoint to the VPC for Step Functions (the service by default runs in Isolated or Private subnets)
+* Enables CloudWatch logging
+
+## Architecture
+![Architecture Diagram](architecture.png)
+
+***
+&copy; Copyright 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.

source/patterns/@aws-solutions-constructs/aws-fargate-stepfunctions/lib/index.ts

@@ -0,0 +1,187 @@
+/**
+ *  Copyright 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance
+ *  with the License. A copy of the License is located at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  or in the 'license' file accompanying this file. This file is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES
+ *  OR CONDITIONS OF ANY KIND, express or implied. See the License for the specific language governing permissions
+ *  and limitations under the License.
+ */
+
+// Note: To ensure CDKv2 compatibility, keep the import statement for Construct separate
+import { Construct } from "@aws-cdk/core";
+import * as defaults from "@aws-solutions-constructs/core";
+import * as ecs from "@aws-cdk/aws-ecs";
+import * as ec2 from "@aws-cdk/aws-ec2";
+import * as sfn from '@aws-cdk/aws-stepfunctions';
+import * as logs from '@aws-cdk/aws-logs';
+import * as cloudwatch from '@aws-cdk/aws-cloudwatch';
+
+export interface FargateToStepfunctionsProps {
+  /**
+   * Whether the construct is deploying a private or public API. This has implications for the VPC deployed
+   * by this construct.
+   *
+   * @default - none
+   */
+  readonly publicApi: boolean;
+  /**
+   * Optional custom properties for a VPC the construct will create. This VPC will
+   * be used by the new Fargate service the construct creates (that's
+   * why targetGroupProps can't include a VPC). Providing
+   * both this and existingVpc is an error. A Step Functions Interface
+   * endpoint will be included in this VPC.
+   *
+   * @default - A set of defaults from vpc-defaults.ts: DefaultPublicPrivateVpcProps() for public APIs
+   * and DefaultIsolatedVpcProps() for private APIs.
+   */
+  readonly vpcProps?: ec2.VpcProps;
+  /**
+   * An existing VPC in which to deploy the construct. Providing both this and
+   * vpcProps is an error. If the client provides an existing Fargate service,
+   * this value must be the VPC where the service is running. A Step Functions Interface
+   * endpoint will be added to this VPC.
+   *
+   * @default - none
+   */
+  readonly existingVpc?: ec2.IVpc;
+  /**
+   * Optional properties to create a new ECS cluster
+   */
+  readonly clusterProps?: ecs.ClusterProps;
+  /**
+   * The arn of an ECR Repository containing the image to use
+   * to generate the containers
+   *
+   * format:
+   *   arn:aws:ecr:[region]:[account number]:repository/[Repository Name]
+   */
+  readonly ecrRepositoryArn?: string;
+  /**
+   * The version of the image to use from the repository
+   *
+   * @default - 'latest'
+   */
+  readonly ecrImageVersion?: string;
+  /*
+   * Optional props to define the container created for the Fargate Service
+   *
+   * defaults - fargate-defaults.ts
+   */
+  readonly containerDefinitionProps?: ecs.ContainerDefinitionProps | any;
+  /*
+   * Optional props to define the Fargate Task Definition for this construct
+   *
+   * defaults - fargate-defaults.ts
+   */
+  readonly fargateTaskDefinitionProps?: ecs.FargateTaskDefinitionProps | any;
+  /**
+   * Optional values to override default Fargate Task definition properties
+   * (fargate-defaults.ts). The construct will default to launching the service
+   * is the most isolated subnets available (precedence: Isolated, Private and
+   * Public). Override those and other defaults here.
+   *
+   * defaults - fargate-defaults.ts
+   */
+  readonly fargateServiceProps?: ecs.FargateServiceProps | any;
+  /**
+   * A Fargate Service already instantiated (probably by another Solutions Construct). If
+   * this is specified, then no props defining a new service can be provided, including:
+   * existingImageObject, ecrImageVersion, containerDefintionProps, fargateTaskDefinitionProps,
+   * ecrRepositoryArn, fargateServiceProps, clusterProps, existingClusterInterface. If this value
+   * is provided, then existingContainerDefinitionObject must be provided as well.
+   *
+   * @default - none
+   */
+  readonly existingFargateServiceObject?: ecs.FargateService;
+  /*
+   * A container definition already instantiated as part of a Fargate service. This must
+   * be the container in the existingFargateServiceObject.
+   *
+   * @default - None
+   */
+  readonly existingContainerDefinitionObject?: ecs.ContainerDefinition;
+  /**
+   * User provided StateMachineProps to override the defaults
+   *
+   * @default - None
+   */
+  readonly stateMachineProps: sfn.StateMachineProps;
+  /**
+   * Whether to create recommended CloudWatch alarms
+   *
+   * @default - true
+   */
+  readonly createCloudWatchAlarms?: boolean;
+  /**
+   * User provided props to override the default props for the CloudWatchLogs LogGroup.
+   *
+   * @default - Default props are used
+   */
+  readonly logGroupProps?: logs.LogGroupProps;
+  /**
+   * Optional name for the container environment variable containing the state machine ARN.
+   *
+   * @default - None
+   */
+  readonly stateMachineEnvironmentVariableName?: string;
+}
+
+export class FargateToStepfunctions extends Construct {
+  public readonly vpc: ec2.IVpc;
+  public readonly service: ecs.FargateService;
+  public readonly container: ecs.ContainerDefinition;
+  public readonly stateMachine: sfn.StateMachine;
+  public readonly stateMachineLogGroup: logs.ILogGroup;
+  public readonly cloudwatchAlarms?: cloudwatch.Alarm[];
+
+  constructor(scope: Construct, id: string, props: FargateToStepfunctionsProps) {
+    super(scope, id);
+    defaults.CheckProps(props);
+    defaults.CheckFargateProps(props);
+
+    this.vpc = defaults.buildVpc(scope, {
+      existingVpc: props.existingVpc,
+      defaultVpcProps: props.publicApi ? defaults.DefaultPublicPrivateVpcProps() : defaults.DefaultIsolatedVpcProps(),
+      userVpcProps: props.vpcProps,
+      constructVpcProps: { enableDnsHostnames: true, enableDnsSupport: true }
+    });
+
+    defaults.AddAwsServiceEndpoint(scope, this.vpc, defaults.ServiceEndpointTypes.STEP_FUNCTIONS);
+
+    if (props.existingFargateServiceObject) {
+      this.service = props.existingFargateServiceObject;
+      // CheckFargateProps confirms that the container is provided
+      this.container = props.existingContainerDefinitionObject!;
+    } else {
+      [this.service, this.container] = defaults.CreateFargateService(
+        scope,
+        id,
+        this.vpc,
+        props.clusterProps,
+        props.ecrRepositoryArn,
+        props.ecrImageVersion,
+        props.fargateTaskDefinitionProps,
+        props.containerDefinitionProps,
+        props.fargateServiceProps
+      );
+    }
+
+    [this.stateMachine, this.stateMachineLogGroup] = defaults.buildStateMachine(this, props.stateMachineProps,
+      props.logGroupProps);
+
+    this.stateMachine.grantStartExecution(this.service.taskDefinition.taskRole);
+
+    if (props.createCloudWatchAlarms === undefined || props.createCloudWatchAlarms) {
+      // Deploy best-practice CloudWatch Alarm for state machine
+      this.cloudwatchAlarms = defaults.buildStepFunctionCWAlarms(this, this.stateMachine);
+    }
+
+    // Add environment variable
+    const stateMachineEnvironmentVariableName = props.stateMachineEnvironmentVariableName || 'STATE_MACHINE_ARN';
+    this.container.addEnvironment(stateMachineEnvironmentVariableName, this.stateMachine.stateMachineArn);
+  }
+}