Actions for AWS Elastic Load Balancing V2

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AWS CDK v1 has reached End-of-Support on 2023-06-01. This package is no longer being updated, and users should migrate to AWS CDK v2.

For more information on how to migrate, see the Migrating to AWS CDK v2 guide.

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This package contains integration actions for ELBv2. See the README of the @aws-cdk/aws-elasticloadbalancingv2 library.

Cognito

ELB allows for requests to be authenticated against a Cognito user pool using the AuthenticateCognitoAction. For details on the setup’s requirements, read Prepare to use Amazon Cognito. Here’s an example:

import aws_cdk.aws_cognito as cognito
import aws_cdk.aws_ec2 as ec2
import aws_cdk.aws_elasticloadbalancingv2 as elbv2
from aws_cdk.core import App, CfnOutput, Stack
from constructs import Construct
import aws_cdk.aws_elasticloadbalancingv2_actions as actions

Stack): lb = elbv2.ApplicationLoadBalancer(self, "LB",
    vpc=vpc,
    internet_facing=True
)

user_pool = cognito.UserPool(self, "UserPool")
user_pool_client = cognito.UserPoolClient(self, "Client",
    user_pool=user_pool,

    # Required minimal configuration for use with an ELB
    generate_secret=True,
    auth_flows=cognito.AuthFlow(
        user_password=True
    ),
    o_auth=cognito.OAuthSettings(
        flows=cognito.OAuthFlows(
            authorization_code_grant=True
        ),
        scopes=[cognito.OAuthScope.EMAIL],
        callback_urls=[f"https://{lb.loadBalancerDnsName}/oauth2/idpresponse"
        ]
    )
)
cfn_client = user_pool_client.node.default_child
cfn_client.add_property_override("RefreshTokenValidity", 1)
cfn_client.add_property_override("SupportedIdentityProviders", ["COGNITO"])

user_pool_domain = cognito.UserPoolDomain(self, "Domain",
    user_pool=user_pool,
    cognito_domain=cognito.CognitoDomainOptions(
        domain_prefix="test-cdk-prefix"
    )
)

lb.add_listener("Listener",
    port=443,
    certificates=[certificate],
    default_action=actions.AuthenticateCognitoAction(
        user_pool=user_pool,
        user_pool_client=user_pool_client,
        user_pool_domain=user_pool_domain,
        next=elbv2.ListenerAction.fixed_response(200,
            content_type="text/plain",
            message_body="Authenticated"
        )
    )
)

CfnOutput(self, "DNS",
    value=lb.load_balancer_dns_name
)

app = App()
CognitoStack(app, "integ-cognito")
app.synth()

NOTE: this example seems incomplete, I was not able to get the redirect back to the Load Balancer after authentication working. Would love some pointers on what a full working setup actually looks like!