https://github.com/pulumi/pulumi-cdk
Pulumi/CDK Interop Library
https://github.com/pulumi/pulumi-cdk
Last synced: 2 months ago
JSON representation
Pulumi/CDK Interop Library
- Host: GitHub
- URL: https://github.com/pulumi/pulumi-cdk
- Owner: pulumi
- License: apache-2.0
- Created: 2022-04-11T22:02:25.000Z (about 3 years ago)
- Default Branch: main
- Last Pushed: 2025-03-27T18:45:50.000Z (3 months ago)
- Last Synced: 2025-03-28T07:04:12.359Z (3 months ago)
- Language: TypeScript
- Size: 12.5 MB
- Stars: 76
- Watchers: 22
- Forks: 5
- Open Issues: 38
-
Metadata Files:
- Readme: README.md
- License: LICENSE
- Code of conduct: CODE-OF-CONDUCT.md
Awesome Lists containing this project
README
# Pulumi CDK Adapter
The pulumi-cdk library provides access to the many high-level libraries ('constructs') built by service
teams at AWS and by [the AWS CDK community](https://constructs.dev/).
The adapter allows writing [AWS CDK](https://docs.aws.amazon.com/cdk/v2/guide/home.html) code inside a
Pulumi program, and having the resulting AWS resources be deployed and managed via Pulumi. Pulumi and CDK resources can
seamlessly interact with each other. Outputs of resources defined in a Pulumi program can be passed into AWS CDK Constructs,
and outputs from AWS CDK stacks can be used as inputs to other Pulumi resources.
## Table of Contents
- [Pulumi CDK Adapter](#pulumi-cdk-adapter)
- [Getting Started](#getting-started)
- [Use Pulumi resources with CDK Constructs](#use-pulumi-resources-with-cdk-constructs)
- [Create Pulumi outputs](#create-pulumi-outputs)
- [Customizing providers](#customizing-providers)
- [CDK Lookups](#cdk-lookups)
- [Using Pulumi Policy Packs](#using-pulumi-policy-packs)
- [CDK Aspects](#cdk-aspects)
- [CDK Policy Validation Plugins](#cdk-policy-validation-plugins)
- [Mapping AWS resources](#mapping-aws-resources)
- [Using Assets](#using-assets)
- [Feature Flags](#feature-flags)
- [Setting Pulumi options for CDK resources](#setting-pulumi-options-for-cdk-resources)
- [Pulumi Synthesizer](#pulumi-synthesizer)
- [Unsupported Features](#unsupported-features)
- [AWS Cloud Control AutoNaming Config](#aws-cloud-control-autonaming-config)
- [Bootstrapping](#bootstrapping)
- [Multiple Stacks](#multiple-stacks)
- [API](#api)
- [Contributing](#contributing)
## Getting Started
To get started with CDK on Pulumi first [download and install Pulumi](https://www.pulumi.com/docs/install/), and [configure it to work with your AWS account](https://www.pulumi.com/registry/packages/aws/installation-configuration/).
Next, create a Pulumi TypeScript project, install the required packages, and
ensure you have configured the AWS providers.
```bash
$ pulumi new aws-typescript
$ npm install @pulumi/aws @pulumi/aws-native @pulumi/cdk @pulumi/docker-build @pulumi/pulumi aws-cdk-lib
$ pulumi config set aws-native:region us-east-2
$ pulumi config set aws:region us-east-2
```
### cdk.json File
Settings for CDK applications are typically stored in a `cdk.json` file at the
root of the project. It is recommended that you create one and populate it with
a couple of settings.
- `app`: This setting controls what command to run in order to synthesize the
CDK application.
- `output`: The directory location where the CDK output will be placed. If this
is not specified it will be placed in a system temporary directory and could
cause issues such as permanent diffs in docker image assets.
- `context`: Any context values, specifically [CDK features flags](https://docs.aws.amazon.com/cdk/v2/guide/featureflags.html).
You should populate all existing feature flags when you create a new
application. A full list can be found [here](#feature-flags)
```json
{
"app": "npx ts-node -P tsconfig.json --prefer-ts-exts src/main.ts",
"output": "cdk.out",
"context": {
"@aws-cdk/aws-iam:minimizePolicies": true,
...other feature flags
}
}
```
## Example
After following the [getting started](#getting-started) steps, the next step is
to setup your application. For this example we are using the [AWS AppRunner serivce](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-apprunner-alpha-readme.html).
We will create an AppRunner `Service` from within our Pulumi program, and export the resulting service's URL as a
Pulumi Stack Output.
First install the additional `aws-apprunner-alpha` CDK package:
```bash
$ npm install @aws-cdk/aws-apprunner-alpha
```
Then update the `index.ts` file with the following code:
```ts
import * as pulumi from '@pulumi/pulumi';
import * as pulumicdk from '@pulumi/cdk';
import { Service, Source } from '@aws-cdk/aws-apprunner-alpha';
class AppRunnerStack extends pulumicdk.Stack {
url: pulumi.Output;
constructor(id: string, options?: pulumicdk.StackOptions) {
super(id, options);
const service = new Service(this, 'service', {
source: Source.fromEcrPublic({
imageConfiguration: { port: 8000 },
imageIdentifier: 'public.ecr.aws/aws-containers/hello-app-runner:latest',
}),
});
this.url = this.asOutput(service.serviceUrl);
}
}
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new AppRunnerStack('teststack');
return {
url: stack.url,
};
});
export const url = app.outputs['url'];
```
And then deploy with `pulumi update`:
```console
> pulumi up
Updating (dev)
View Live: https://app.pulumi.com/lukehoban/pulumi-cdk-apprunner/dev/updates/1
Type Name Status
+ pulumi:pulumi:Stack pulumi-cdk-apprunner-dev created
+ └─ cdk:index:StackComponent teststack created
+ └─ cdk:construct:Service teststack/adapter/service created
+ └─ aws-native:apprunner:Service service6D174F83 created
Outputs:
url: "2ez3iazupm.us-west-2.awsapprunner.com"
Resources:
+ 4 created
```
And curl the endpoint:
```console
> curl https://$(pulumi stack output url)
______ __ __ __ _ __
/ ____/___ ____ ____ __________ _/ /___ __/ /___ _/ /_(_)___ ____ _____/ /
/ / / __ \/ __ \/ __ `/ ___/ __ `/ __/ / / / / __ `/ __/ / __ \/ __ \/ ___/ /
/ /___/ /_/ / / / / /_/ / / / /_/ / /_/ /_/ / / /_/ / /_/ / /_/ / / / (__ )_/
\____/\____/_/ /_/\__, /_/ \__,_/\__/\__,_/_/\__,_/\__/_/\____/_/ /_/____(_)
/____/
Congratulations, your service has successfully deployed on AWS App Runner.
Open it in your browser at https://2ez3iazupm.us-west-2.awsapprunner.com/
Try the workshop at https://apprunnerworkshop.com
Read the docs at https://docs.aws.amazon.com/apprunner
```
## Use Pulumi resources with CDK Constructs
It is possible to use Pulumi and CDK resources side-by-side. In order to pass a
Pulumi Output value into a CDK resource you can use the [asString](./api-docs/README.md#asString), [asList](./api-docs/README.md#asList), &
[asNumber](./api-docs/README.md#asNumber) functions. Conversely, in order to pass a CDK attribute to a Pulumi
resource, you can use the [Stack.asOutput](./api-docs/README.md#asOutput) function to convert the CDK resource
to a Pulumi Output value.
### CDK to Pulumi Example
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
import * as s3ObjectLambda from 'aws-cdk-lib/aws-s3objectlambda';
import * as s3 from 'aws-cdk-lib/aws-s3';
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
const stack = new pulumicdk.Stack('accesspoint-stack');
const bucket = new s3.Bucket(stack, 'example-bucket');
const policyDoc = new iam.PolicyDocument();
policyDoc.addStatements(...);
const ap = new aws.s3.AccessPoint('exampleBucketAP', {
// Use `asOutput` to convert the bucketName attribute to a Pulumi Output
bucket: stack.asOutput(bucket.bucketName),
name: S3_ACCESS_POINT_NAME,
policy: policyDoc.toJSON(),
}, { parent: scope });
const objectLambdaAP = new s3ObjectLambda.CfnAccessPoint(stack, 's3ObjectLambdaAP', {
name: OBJECT_LAMBDA_ACCESS_POINT_NAME,
objectLambdaConfiguration: {
// Use `asString` to convert a Pulumi Output to a string value
supportingAccessPoint: pulumicdk.asString(ap.arn),
transformationConfigurations: [...],
},
});
});
```
### Pulumi to CDK Example
CDK L2 Constructs do not normally take simple values. Instead, they take
references to other L2 Constructs. If you want to take a Pulumi resource and
pass that in to a CDK Construct, you first have turn the Pulumi resource into a
reference to a CDK L2 Construct. You can do this by using `asString` in
combination with CDK `fromXXX` methods.
**Example**
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
import * as aws_route53 from 'aws-cdk-lib/aws-route53';
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
const stack = new pulumicdk.Stack('example-stack');
// create a Pulumi Resource
const zone = new aws.route53.Zone('example-zone', {
name: 'cooldomain.io',
});
// Turn it into a reference to a CDK L2 Construct (IHostedZone)
const hostedZone = aws_route53.HostedZone.fromHostedZoneAttributes(
this,
'hosted-zone',
{
zoneName: asString(zone.name),
hostedZoneId: asString(zone.zoneId),
},
);
new aws_route53.CnameRecord(this, 'record', {
zone: hostedZone, // pass it into another L2 Construct
domainName: 'example.com',
recordName: 'test',
});
});
```
## Create Pulumi outputs
In order to create Pulumi [Stack outputs](https://www.pulumi.com/docs/iac/concepts/stacks/#outputs)
you also need to propagate the [App outputs](./api-docs/README.md#AppOutputs) all the way to the Pulumi Stack
outputs. You can do this in one of two ways.
**CfnOutput**
Any `CfnOutput` that you create automatically gets added to the `App outputs`.
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as s3 from 'aws-cdk-lib/aws-s3';
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
const stack = new pulumicdk.Stack('example-stack');
const bucket = new s3.Bucket(stack, 'Bucket');
new cdk.CfnOutput(stack, 'BucketName', { value: bucket.bucketName });
});
export const bucketName = app.outputs['BucketName'];
```
**AppOutputs**
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as s3 from 'aws-cdk-lib/aws-s3';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
const bucket = new s3.Bucket(stack, 'Bucket');
return {
bucketName: stack.asOutput(bucket.bucketName),
}
});
export const bucketName = app.outputs['bucketName'];
```
## Customizing providers
Currently Pulumi CDK utilizes three Pulumi providers.
1. [AWS Provider](https://www.pulumi.com/registry/packages/aws/)
2. [AWS Cloud Control Provider](https://www.pulumi.com/registry/packages/aws-native/)
3. [Docker Build Provider](https://www.pulumi.com/registry/packages/docker-build/)
If you want to customize any of these providers you can create your own and pass
them to the [AppResourceOptions](./api-docs/README.md#AppResourceOptions)
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
import * as ccapi from '@pulumi/aws-native';
import * as build from '@pulumi/docker-build';
const awsProvider = new aws.Provider('aws-provider');
const awsCCAPIProvider = new ccapi.Provider('ccapi-provider', {
region: 'us-east-2',
// enable autoNaming
autoNaming: {
autoTrim: true,
randomSuffixMinLength: 7,
}
});
const dockerBuildProvider = new build.Provider('docker-build');
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
const stack = new pulumicdk.Stack('example-stack');
const bucket = new s3.Bucket(stack, 'Bucket');
}, {
providers: [
dockerBuildProvider,
awsProvider,
awsCCAPIProvider,
]
});
```
### Stack Level Providers
It is also possible to customize the Providers at the Stack level. This can be
useful in cases where you need to deploy resources to different AWS regions.
```ts
import * as aws from '@pulumi/aws';
import * as ccapi from '@pulumi/aws-native';
import * as pulumicdk from '@pulumi/cdk';
const awsProvider = new aws.Provider('aws-provider');
const awsCCAPIProvider = new ccapi.Provider('ccapi-provider', {
// enable autoNaming
autoNaming: {
autoTrim: true,
randomSuffixMinLength: 7,
}
});
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
// inherits the provider from the app
const defaultProviderStack = new pulumicdk.Stack('default-provider-stack');
const bucket = new s3.Bucket(defaultProviderStack, 'Bucket');
// use a different provider for this stack
const east2Stack = new pulumicdk.Stack('east2-stack', {
providers: [
new aws.Provider('east2-provider', { region: 'us-east-2' }),
new ccapi.Provider('east2-ccapi-provider', {
region: 'us-east-2',
autoNaming: {
autoTrim: true,
randomSuffixMinLength: 7,
},
}),
],
});
const bucket2 = new s3.Bucket(east2Stack, 'Bucket');
}, {
providers: [
dockerBuildProvider,
awsProvider,
awsCCAPIProvider,
]
});
```
One thing to note is that when you pass different custom providers to a Stack,
by default the Stack becomes an [environment agnostic stack](https://docs.aws.amazon.com/cdk/v2/guide/configure-env.html#configure-env-examples).
If you want to have the environment specified at the CDK Stack level, then you
also need to provide the environment to the Stack Props, as follows:
```ts
import * as aws from '@pulumi/aws';
import * as ccapi from '@pulumi/aws-native';
import * as pulumicdk from '@pulumi/cdk';
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
// inherits the provider from the app and has the CDK env auto populated
// based on the default provider
const defaultProviderStack = new pulumicdk.Stack('default-provider-stack');
const bucket = new s3.Bucket(defaultProviderStack, 'Bucket');
// use a different provider for this stack
const east2Stack = new pulumicdk.Stack('east2-stack', {
props: {
env: {
region: 'us-east-2',
account: '12345678912',
},
},
providers: [
new aws.Provider('east2-provider', { region: 'us-east-2' }),
new ccapi.Provider('east2-ccapi-provider', {
region: 'us-east-2',
autoNaming: {
autoTrim: true,
randomSuffixMinLength: 7,
},
}),
],
});
const bucket2 = new s3.Bucket(east2Stack, 'Bucket');
});
```
## CDK Lookups
CDK [lookups](https://docs.aws.amazon.com/cdk/v2/guide/context.html#context_methods) are currently disabled by default.
If you would like to use lookups there are currently two options.
### Use Pulumi functions
Instead of using CDK Lookups you can use Pulumi functions along with CDK
`fromXXX` methods.
**Example**
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
// use getAmiOutput to lookup the AMI instead of ec2.LookupMachineImage
const ami = aws.ec2.getAmiOutput({
owners: ['amazon'],
mostRecent: true,
filters: [
{
name: 'name',
values: ['al2023-ami-2023.*.*.*.*-arm64'],
},
],
});
const region = aws.config.requireRegion();
const machineImage = ec2.MachineImage.genericLinux({
[region]: pulumicdk.asString(ami.imageId),
});
const instance = new ec2.Instance(this, 'Instance', {
vpc,
instanceType: ec2.InstanceType.of(ec2.InstanceClass.T4G, ec2.InstanceSize.MICRO),
machineImage,
});
});
```
### Experimental Lookup Support
Set the environment variable `PULUMI_CDK_EXPERIMENTAL_LOOKUPS=true`. This will
allow lookups to run during preview operations, but will require you to execute
Pulumi twice (the first execution will fail).
**Example**
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws_route53 from 'aws-cdk-lib/aws-route53';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
const hostedZone = aws_route53.HostedZone.fromLookup(this, 'hosted-zone', {
domainName: zoneName,
});
new aws_route53.AaaaRecord(this, 'record', {
zone: hostedZone,
target: aws_route53.RecordTarget.fromAlias(new aws_route53_targets.LoadBalancerTarget(lb)),
});
});
```
```console
PULUMI_CDK_EXPERIMENTAL_LOOKUPS=true pulumi preview
```
You will see an error message that looks something like the error message below.
```console
cdk:construct:StagingStack (staging-stack):
error: Duplicate resource URN 'urn:pulumi:project::pulumi-lookups-enabled::cdk:index:App$cdk:construct:StagingStack::staging-stack-'; try giving it a unique name
```
At this point the lookups have been performed and you should be able to run
Pulumi commands without errors.
## Using Pulumi Policy Packs
You can use [Policy
Packs](https://www.pulumi.com/docs/iac/packages-and-automation/crossguard/get-started/#get-started-with-pulumi-policy-as-code)
with your Pulumi CDK Application. It is also possible to use CDK specific policy
validation tools (a couple are discussed below), but it is recommended to use
Pulumi specific tools, especially if you are creating Pulumi resources outside
of CDK.
Below is an example output using Pulumi's [Compliance Ready Policies](https://www.pulumi.com/docs/iac/packages-and-automation/crossguard/compliance-ready-policies/)
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as s3 from 'aws-cdk-lib/aws-s3';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
new s3.Bucket(this, 'bucket');
});
```
**Example output**
```console
Policies:
❌ [email protected] (local: ../policypack)
- [mandatory] awsnative-s3-bucket-enable-server-side-encryption (aws-native:s3:Bucket: bucket)
Check that S3 Bucket Server-Side Encryption (SSE) is enabled.
S3 Buckets Server-Side Encryption (SSE) should be enabled.
```
## CDK Aspects
Pulumi CDK supports CDK Aspects, including aspects like [cdk-nag](https://github.com/cdklabs/cdk-nag)
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as s3 from 'aws-cdk-lib/aws-s3';
import { AwsSolutionsChecks } from 'cdk-nag';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
Aspects.of(stack).add(new AwsSolutionsChecks({ verbose: true }));
new s3.Bucket(this, 'bucket');
});
```
**Example Output**
```console
[Error at /test-stack/bucket/Resource] AwsSolutions-S1: The S3 Bucket has server access logs disabled. The bucket should have server access logging enabled to provide detailed records for the requests that are made to the bucket.
[Error at /test-stack/bucket/Resource] AwsSolutions-S10: The S3 Bucket or bucket policy does not require requests to use SSL. You can use HTTPS (TLS) to help prevent potential attackers from eavesdropping on or manipulating network traffic using person-in-the-middle or similar attacks. You should allow only encrypted connections over HTTPS (TLS) using the aws:SecureTransport condition on Amazon S3 bucket policies.
```
## CDK Policy Validation Plugins
Pulumi CDK also supports [CDK Policy Validation Plugins](https://docs.aws.amazon.com/cdk/v2/guide/policy-validation-synthesis.html).
```ts
import * as pulumicdk from '@pulumi/cdk';
import { CfnGuardValidator } from '@cdklabs/cdk-validator-cfnguard';
import * as s3 from 'aws-cdk-lib/aws-s3';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
new s3.Bucket(this, 'bucket');
}, {
appOptions: {
props: {
policyValidationBeta1: [new CfnGuardValidator()],
},
},
});
```
**Example Output**
```console
Diagnostics:
pulumi:pulumi:Stack (pulumi-typescript-app-dev):
Performing Policy Validations
Validation failed. See the validation report above for details
Validation Report
-----------------
╔════════════════════════════════════╗
║ Plugin Report ║
║ Plugin: cdk-validator-cfnguard ║
║ Version: N/A ║
║ Status: failure ║
╚════════════════════════════════════╝
(Violations)
s3_bucket_level_public_access_prohibited_check (1 occurrences)
Occurrences:
- Construct Path: test-stack/bucket/Resource
- Template Path: /private/var/folders/3b/6mr1jkqx7r797ff75k27jfjc0000gn/T/cdk.outC3dFwa/test-stack.template.json
- Creation Stack:
└── test-stack (test-stack)
│ Construct: aws-cdk-lib.Stack
│ Library Version: 2.166.0
│ Location: Run with '--debug' to include location info
└── bucket (test-stack/bucket)
│ Construct: aws-cdk-lib.aws_s3.Bucket
│ Library Version: 2.166.0
│ Location: Run with '--debug' to include location info
└── Resource (test-stack/bucket/Resource)
│ Construct: aws-cdk-lib.aws_s3.CfnBucket
│ Library Version: 2.166.0
│ Location: Run with '--debug' to include location info
- Resource ID: bucket
- Template Locations:
> /Resources/bucket
Description: [CT.S3.PR.1]: Require an Amazon S3 bucket to have block public access settings configured
How to fix: [FIX]: The parameters 'BlockPublicAcls', 'BlockPublicPolicy', 'IgnorePublicAcls', 'RestrictPublicBuckets' must be set to true under the bucket-level 'PublicAccessBlockConfiguration'.
Rule Metadata:
DocumentationUrl: https://github.com/cdklabs/cdk-validator-cfnguard#bundled-control-tower-rules
```
## Mapping AWS resources
Pulumi CDK automatically maps CDK resources to [AWS CCAPI](https://www.pulumi.com/registry/packages/aws-native/)
resources, but there are some resources that are not yet available in CCAPI. In
these cases it is possible to manually map the CloudFormation resource to an
[AWS Provider](https://www.pulumi.com/registry/packages/aws/) resource. A couple
of common resources have been mapped in
[aws-resource-mappings.ts](./src/aws-resource-mappings.ts) which can be used as
a reference.
### Simple mapping
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
}, {
appOptions: {
remapCloudControlResource: (logicalId, typeName, props, options): ResourceMapping | undefined => {
if (typeName === 'AWS::ApiGatewayV2::Stage') {
return new aws.apigatewayv2.Stage(
logicalId,
{
accessLogSettings: props.AccessLogSettings,
apiId: props.ApiId,
...
},
options,
)
}
return undefined;
},
}
});
```
### Mapping to multiple resources
Sometimes a single CloudFormation resource maps to multiple AWS Provider
resources. In these cases you should return the `logicalId` of the resource
along with the resource itself.
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
}, {
appOptions: {
remapCloudControlResource: (logicalId, typeName, props, options): ResourceMapping | undefined => {
if (typeName === 'AWS::SQS::QueuePolicy') {
const queues: string[] = props.queues ?? [];
return queues.flatMap((q: string, i: number) => {
const id = i === 0 ? logicalId : `${logicalId}-policy-${i}`;
return {
logicalId: id,
resource: new aws.sqs.QueuePolicy(
id,
{
policy: rawProps.PolicyDocument,
queueUrl: q,
},
options,
),
};
});
}
return undefined;
},
}
});
```
## Using Assets
### Docker Assets
In order to use Docker assets with Pulumi CDK you have to provide the `assetName` when
you create the asset. This is because Pulumi CDK will automatically create a ECR
Repository per image asset.
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as aws from '@pulumi/aws';
import * as ec2 from 'aws-cdk-lib/aws-ec2';
import * as ecs from 'aws-cdk-lib/aws-ecs';
import * as ecs_patterns from 'aws-cdk-lib/aws-ecs-patterns';
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
const stack = new pulumicdk.Stack('example-stack');
const vpc = new ec2.Vpc(stack, 'MyVpc');
const cluster = new ecs.Cluster(stack, 'fargate-service-autoscaling', { vpc });
// Create Fargate Service
const fargateService = new ecs_patterns.NetworkLoadBalancedFargateService(this, 'sample-app', {
cluster,
taskImageOptions: {
image: ecs.ContainerImage.fromAsset(path.join(__dirname, './'), {
// assetName is now required and is used in the name of the ecr repository that is created
assetName: 'cdk-fargate-example',
}),
},
});
});
```
> **Note** If you have issues with permanent asset diffs, make sure you have
> created a [cdk.json](#cdk.json-file) with the `outdir` set to a project relative
> directory.
## Feature Flags
Feature flags in Pulumi CDK work the exact same way as in AWS CDK and can be set
the same way as well (e.g. `cdk.json`). You can view the currently recommended
set of feature flags [here](https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/cx-api/FEATURE_FLAGS.md#currently-recommended-cdkjson).
## Setting Pulumi options for CDK resources
You can set Pulumi resource options for CDK resources by using [Transforms](https://www.pulumi.com/docs/iac/concepts/options/transforms/).
For example, if you wanted to set `protect` on database resources you could use
a transform like this.
```ts
import * as pulumicdk from '@pulumi/cdk';
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new pulumicdk.Stack('example-stack');
}, {
transforms: [
(args: pulumi.ResourceTransformArgs): pulumi.ResourceTransformResult => {
if (args.type === 'aws-native:rds:DbCluster') {
return {
props: args.props,
opts: pulumi.mergeOptions(args.opts, { protect: true }),
};
}
return undefined;
},
]
});
```
## Pulumi Synthesizer
By default Pulumi CDK uses a custom [PulumiSynthesizer](./api-docs/Namespace.synthesizer.md).
One of the things a CDK [Synthesizer](https://docs.aws.amazon.com/cdk/v2/guide/configure-synth.html) is
used for is registering assets. The `PulumiSynthesizer` handles automatically
provisioning the required resources (see [Bootstrapping](#bootstrapping)) and
uploading File and Image assets.
In order to customize the settings, you can pass in a `PulumiSynthesizer` that
you create.
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as s3 from 'aws-cdk-lib/aws-s3';
const app = new pulumicdk.App('app', (scope: pulumicdk.App) => {
const stack = new pulumicdk.Stack('example-stack');
const bucket = new s3.Bucket(stack, 'Bucket');
}, {
appOptions: {
props: {
defaultStackSynthesizer: new pulumicdk.PulumiSynthesizer({
appId: `cdk-${pulumi.getStack()}`,
autoDeleteStagingAssets: false,
})
}
}
});
```
## Unsupported Features
### Unsupported CloudFormation Features
- [Fn::Transform](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-transform.html)
- [Transforms](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/transform-reference.html)
- [CloudFormation helper scripts](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cfn-helper-scripts-reference.html)
- cfn-init
- cfn-signal
- cfn-get-metadata
- cfn-hup
- ResourceAttributes
- [CreationPolicy](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-creationpolicy.html)
- [Snapshot DeletionPolicy](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html)
- [UpdatePolicy](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-updatepolicy.html)
- [UpdateReplacePolicy](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-updatereplacepolicy.html)
### Unsupported CDK Features
- Cross stack references
## AWS Cloud Control AutoNaming Config
Sometimes CDK constructs can create resource names that are too long for the
[AWS Cloud Control provider](https://www.pulumi.com/registry/packages/aws-native/).
When this happens you can configure the `autoTrim` feature to have the generated
names be automatically trimmed to fit within the name requirements. If you are
not configuring your own `aws-native` provider then this feature is enabled by
default. If you _are_ configuring your own `aws-native` provider then you will
have to enable this.
```ts
import * as pulumicdk from '@pulumi/cdk';
import * as ccapi from '@pulumi/aws-native';
const nativeProvider = new ccapi.Provider('cdk-native-provider', {
region: 'us-east-2',
autoNaming: {
autoTrim: true,
randomSuffixMinLength: 7,
},
});
const app = new pulumicdk.App('app', (scope: pulumicdk.App): pulumicdk.AppOutputs => {
const stack = new AppRunnerStack('teststack');
return {
url: stack.url,
};
}, {
providers: [ nativeProvider ],
});
```
## Bootstrapping
CDK has the concept of [bootstrapping](https://docs.aws.amazon.com/cdk/v2/guide/bootstrapping.html)
which requires you to first bootstrap your account with certain AWS resources
that CDK needs to exist. With Pulumi CDK this is not required! Pulumi CDK will
automatically and dynamically create the bootstrap resources as needed.
### S3 Resources
When any file assets are added to your application, CDK will automatically
create the following staging resources.
1. [aws.s3.BucketV2](https://www.pulumi.com/registry/packages/aws/api-docs/s3/bucketv2/)
- `forceDestroy`: true
2. [aws.s3.BucketServerSideEncryptionConfigurationV2](https://www.pulumi.com/registry/packages/aws/api-docs/s3/bucketserversideencryptionconfigurationv2/)
- `AES256`
3. [aws.s3.BucketVersioningV2](https://www.pulumi.com/registry/packages/aws/api-docs/s3/bucketversioningv2/)
- `Enabled`
4. [aws.s3.BucketLifecycleConfigurationV2](https://www.pulumi.com/registry/packages/aws/api-docs/s3/bucketlifecycleconfigurationv2/)
- Expire old versions > 365 days
- Expire deploy-time assets > 30 days
5. [aws.s3.BucketPolicy](https://www.pulumi.com/registry/packages/aws/api-docs/s3/bucketpolicy/)
- Require SSL
### ECR Resources
When any image assets are added to your application, CDK will automatically
create the following staging resources.
1. `aws.ecr.Repository`
- `imageTagMutability`: `IMMUTABLE`
2. `aws.ecr.LifecyclePolicy`
- Expire old images when the number of images > 3
## Multiple Stacks
It is possible to use multiple CDK Stacks in your Pulumi CDK application, but
you probably don't need/want to. According to [AWS CDK best practices](https://docs.aws.amazon.com/cdk/v2/guide/best-practices.html#best-practices-apps)
you should separate your application into multiple stacks based on your
deployment patterns, keeping as many resources in the same stack as possible.
Typically the only three scenarios that justify splitting resources into separate
stacks are:
1. CloudFormation stack resource limits
2. Keeping stateful resources (like databases) in a separate stack so that you
can enable termination protection on that stack.
3. Creating resources in multiple regions require you to create a stack per
region.
When using Pulumi CDK you only need to create multiple Stacks for #3. Currently
CDK Stacks in a Pulumi application are only needed when you want to configure a
different set of Pulumi [resource options](https://www.pulumi.com/docs/iac/concepts/options/) (e.g. `providers`). Otherwise all
resources are created as part of the same [Pulumi Stack](https://www.pulumi.com/docs/iac/concepts/update-plans/)
and there is no benefit in splitting resources into multiple CDK Stacks.
### Multi Region
If you need to create resources in multiple regions you can use multiple CDK
Stacks. The below example shows an application that creates a Stack in
`us-east-1` in order to create a Lambda@Edge function and then a second stack in
`us-east-2` which creates the CloudFront resource.
```ts
import * as ccapi from '@pulumi/aws-native';
import * as aws from '@pulumi/aws';
import * as pulumi from '@pulumi/pulumi';
import * as pulumicdk from '@pulumi/cdk';
import * as lambda from 'aws-cdk-lib/aws-lambda';
import * as cloudfront from 'aws-cdk-lib/aws-cloudfront';
import * as cloudfront_origins from 'aws-cdk-lib/aws-cloudfront-origins';
import * as s3 from 'aws-cdk-lib/aws-s3';
interface CloudFrontAppStackProps {
edgeFunctionArn: pulumi.Output;
}
class EdgeFunctionStack extends pulumicdk.Stack {
public versionArn: pulumi.Output;
constructor(scope: pulumicdk.App, id: string) {
super(scope, id, {
props: {
env: {
region: 'us-east-1',
},
},
providers: [
new ccapi.Provider('ccapi', {
region: 'us-east-1',
}),
new aws.Provider('aws', {
region: 'us-east-1',
}),
],
});
const handler = new cloudfront.experimental.EdgeFunction(this, 'edge-handler', {
runtime: lambda.Runtime.NODEJS_LATEST,
handler: 'index.handler',
code: lambda.Code.fromInline('export const handler = async () => { return "hello" }'),
});
this.versionArn = this.asOutput(handler.currentVersion.edgeArn);
}
}
class CloudFrontAppStack extends pulumicdk.Stack {
constructor(scope: pulumicdk.App, id: string, props: CloudFrontAppStackProps) {
super(scope, id);
const bucket = new s3.Bucket(this, 'Bucket');
new cloudfront.Distribution(this, 'distro', {
defaultBehavior: {
origin: new cloudfront_origins.S3Origin(bucket),
edgeLambdas: [
{
eventType: cloudfront.LambdaEdgeEventType.ORIGIN_REQUEST,
functionVersion: lambda.Version.fromVersionArn(
this,
'edge',
pulumicdk.asString(props.edgeFunctionArn),
),
},
],
},
});
}
}
class MyApp extends pulumicdk.App {
constructor() {
super('app', (scope: pulumicdk.App) => {
const edgeStack = new EdgeFunctionStack(scope, 'edge-function');
new CloudFrontAppStack(scope, 'cloudfront-app', {
edgeFunctionArn: edgeStack.versionArn,
});
});
}
}
const app = new MyApp();
const output = app.outputs['url'];
export const url = pulumi.interpolate`https://${output}`;
```
Pulumi CDK does not support native cross stack references. Instead, you can
convert a value to a Pulumi Output in order to reference the value in a separate
stack.
## API
See [API Docs](./api-docs/README.md) for more details.
## Contributing
### Building locally
Install dependencies, build library, and link for local usage.
```sh
$ yarn install
$ yarn build
$ yarn link
```
Run unit test:
```sh
$ yarn test
Basic tests
✔ Checking single resource registration (124ms)
✔ Supports Output (58ms)
Graph tests
✔ Test sort for single resource
✔ Test sort for ASG example (56ms)
✔ Test sort for appsvc example
✔ Test sort for apprunner example
6 passing (278ms)
```
Run Pulumi examples:
```
$ yarn test-examples
```