1. Federated Learning Experimentation Identity Federation with AWS Cognito


    AWS Cognito is a managed service that provides identity verification, sign-up, sign-in, and access control to web and mobile applications. For your goal of setting up federated learning experimentation using AWS Cognito, I'll walk you through the primary resources that you'll need to set up, along with an explanation of each component.

    Here's a breakdown of the AWS Cognito resources and how they are utilized:

    1. UserPool: This is the cornerstone of Cognito for managing users. It will handle user directories, sign up, sign in, and security policies.

    2. UserPoolClient: This is an entity within the User Pool that represents the application that you're authorizing users to access.

    3. IdentityPool: This is useful for granting users access to other AWS services. An Identity Pool also supports federated identity providers such as Google, Facebook, and Amazon, in addition to your Cognito User Pool.

    4. IdentityProvider: Enables federation with other identity providers to your User Pool.

    We will create these resources using Pulumi's infrastructure as code approach. Below is a Python program using Pulumi for provisioning these AWS Cognito resources:

    import pulumi import pulumi_aws as aws # Create a new Cognito User Pool user_pool = aws.cognito.UserPool("myUserPool", name="MyUserPool", password_policy=aws.cognito.UserPoolPasswordPolicyArgs( minimum_length=8, require_numbers=True, require_symbols=True, require_uppercase=True, require_lowercase=True, )) # Create a Cognito User Pool Client for your application to interact with the User Pool user_pool_client = aws.cognito.UserPoolClient("myUserPoolClient", user_pool_id=user_pool.id, allowed_oauth_flows=["code"], allowed_oauth_scopes=["email", "openid"], callback_urls=["https://www.example.com/callback"], logout_urls=["https://www.example.com/signout"], allowed_oauth_flows_user_pool_client=True) # Create a Cognito Identity Pool to allow federated authentication identity_pool = aws.cognito.IdentityPool("myIdentityPool", identity_pool_name="MyIdentityPool", allow_unauthenticated_identities=False, cognito_identity_providers=[aws.cognito.IdentityPoolCognitoIdentityProviderArgs( client_id=user_pool_client.id, provider_name=user_pool.endpoint, server_side_token_check=False, )]) # Export the Ids of the newly created Cognito resources pulumi.export('user_pool_id', user_pool.id) pulumi.export('user_pool_client_id', user_pool_client.id) pulumi.export('identity_pool_id', identity_pool.id)

    In this program:

    • We first declared a UserPool named "MyUserPool", with a password policy to enforce a certain level of password complexity.
    • Next, we created a UserPoolClient, which applications use to leverage the User Pool for authentication. "Callback URLs" and "Logout URLs" are endpoints in your application that AWS Cognito will interact with during the auth process.
    • An IdentityPool named "MyIdentityPool" followed, allowing your application to have authenticated and unauthenticated identities, enabling access to various AWS resources. In this configuration, we don't allow unauthenticated (guest) users.
    • We also connected the IdentityPool to our UserPool using cognito_identity_providers.

    After deploying this Pulumi program, you will have the core components of AWS Cognito set up, which you can then use to implement federated learning experimentation or add additional identity providers for federation (SAML, OIDC, etc.).

    To run this Pulumi program:

    1. Install Pulumi and configure AWS credentials. Make sure you have an AWS account and appropriate permissions for creating Cognito resources.
    2. Write this code in a __main__.py file.
    3. Run pulumi up from the command line in the same directory where your __main__.py resides.
    4. Pulumi CLI will display the proposed changes before applying them to your AWS account. Review them and select 'yes' to proceed with deployment.

    When the process completes, the outputs are the IDs of the created resources, which can be used to reference them in other parts of your AWS setup or application code.