Using aws cognito with mskconnect

Question

Pulumi · Accepted Answer

AWS Cognito provides user identity and data synchronization services, which help secure user access to applications, while Amazon MSK Connect is a service that allows you to run Apache Kafka® Connect on Amazon Managed Streaming for Apache Kafka (Amazon MSK). AWS Cognito can be used for user authentication in applications that use MSK as a data streaming platform.

Here's how you can integrate AWS Cognito with your application and subsequently allow authentication for applications using MSK:

1. Create an AWS Cognito User Pool: This user pool will manage your users' accounts. It includes options for adding sign-up and sign-in functionality to your application, as well as user federation with other identity providers.

2. Set up an AWS Cognito Identity Pool: An identity pool authorizes users to access other AWS services, such as granting access to AWS Lambda or MSK Connect.

3. Integrate the AWS Cognito with your application: This involves using AWS SDKs in your application code to sign-up, sign-in, and manage users.

4. Create an MSK Connect cluster and establish the connection configuration which references your AWS Cognito User Pool for authorizing and authenticating users.

Below is a Pulumi program in TypeScript that sets up an AWS Cognito User Pool, User Pool Client, and an Identity Pool. For the MSK Connect part, we assume you want to connect authenticated users to MSK; however, MSK Connect doesn't have direct integration with Cognito for user authentication. Instead, Kafka usually uses SASL/SCRAM or mTLS for client authentication. You'd typically use Cognito for application-level authentication, and then grant access to the Kafka cluster using IAM roles or Kafka ACLs.

Keep in mind that the Pulumi SDK simplifies creating and configuring AWS resources. You should consult the AWS Cognito documentation to understand the settings of user pools and identity pools that are best suited for your use case.

```typescript
import * as aws from "@pulumi/aws";

// Create a new Cognito User Pool
const userPool = new aws.cognito.UserPool("myUserPool", {
    name: "myUserPool",
    // Configure password policy and other settings as necessary
    passwordPolicy: {
        minimumLength: 8,
        requireNumbers: true,
        requireSymbols: true,
        requireUppercase: true,
        requireLowercase: true,
    },
});

// Create a User Pool Client for your application to interact with the User Pool
const userPoolClient = new aws.cognito.UserPoolClient("myUserPoolClient", {
    userPoolId: userPool.id,
    generateSecret: false, // Should be true if it's a backend application
    allowedOauthFlows: ["code", "implicit"], // Adjust according to your OAuth flow
    allowedOauthScopes: ["openid", "profile", "email"],
    callbackUrls: ["https://www.example.com/callback"],
    logoutUrls: ["https://www.example.com/logout"],
});

// Create a Cognito Identity Pool for federating identities from the User Pool
const identityPool = new aws.cognito.IdentityPool("myIdentityPool", {
    identityPoolName: "myIdentityPool",
    allowUnauthenticatedIdentities: false, // Set to true if you want to allow unauthenticated access
    cognitoIdentityProviders: [
        {
            providerName: userPool.endpoint,
            clientId: userPoolClient.id,
        },
    ],
});

// Export the IDs of the user pool and the user pool client
export const userPoolId = userPool.id;
export const userPoolClientId = userPoolClient.id;
export const identityPoolId = identityPool.id;
```

This program defines a Cognito User Pool with a password policy and a User Pool Client that your application uses to interact with the User Pool. The OAuth flows and scopes are typical configurations for a web application, adjust these as needed.

The Identity Pool will federate identities between the User Pool and AWS. This allows you to create unique identities for users and authenticate them so they can access other AWS services. Here, it's set up to not allow unauthenticated identities, which means you have to sign in through Cognito before you can use this identity to access AWS services.

As you develop your application, you would use the AWS SDK to sign users up and in, and to retrieve tokens that can then be used to authenticate to other services, such as MSK. You would program your application's backend to communicate with Kafka using a Kafka client library configured for your MSK cluster.

Note that this example does not directly integrate with MSK Connect, as MSK Connect does not natively integrate authentication via AWS Cognito, but instead relies on standard Kafka authentication methods like SASL/SCRAM. The usual pattern is to handle user authentication at the application layer with Cognito and then use AWS IAM roles for permissions to connect to MSK.