I want to associate multiple AWS Certificate Manager SSL and TLS certificates with Application Load Balancer using AWS CloudFormation.
Short description
To add a default SSL server for a secure listener, use the Certificates property for the resource AWS::ElasticLoadBalancingV2::Listener. This resource provides one certificate. To add more certificates, use AWS::ElasticLoadBalancingV2::ListenerCertificate. AWS::ElasticLoadBalancingV2::ListenerCertificate includes the Certificates parameter that accepts the list of certificates.
Resolution
Use the following CloudFormation template to create an Application Load Balancer listener with one default certificate:
HTTPlistener:
Type: 'AWS::ElasticLoadBalancingV2::Listener'
DependsOn: ApplicationLoadBalancer
Properties:
DefaultActions:
- Type: fixed-response
FixedResponseConfig:
ContentType: text/plain
MessageBody: Success
StatusCode: '200'
LoadBalancerArn: >-
arn:aws:elasticloadbalancing:<Region>:<AccountID>:loadbalancer/app/TestACMELB/1032d48308c9b37f
Port: '443'
Protocol: HTTPS
Certificates:
- CertificateArn: >-
arn:aws:acm:<Region>:<AccountID>:certificate/cffb8a69-0817-4e04-bfb1-dac7426d6b90
Use the following CloudFormation template to add multiple certificates to the Application Load Balancer listener:
AdditionalCertificates:
Type: 'AWS::ElasticLoadBalancingV2::ListenerCertificate'
DependsOn: HTTPlistener
Properties:
Certificates:
- CertificateArn: >-
arn:aws:acm:<Region>:<AccountID>:certificate/c71a3c29-e79d-40e6-8834-650fe0d54a3f
- CertificateArn: >-
arn:aws:acm:<Region>:<AccountID>:certificate/fff1c1ba-3d97-4735-b3d5-9c5269b75db3
ListenerArn:
Ref: HTTPlistener