How do I enable multiple ecs services to use the same loadbalancer

[sewmiuraj]

Hello,

We are using the module available at terraform-aws-service-catalog.git//modules/services/ecs-service to create our ecs services. However, it creates an alb for each and every service in the same ecs cluster.

I had a look at the variables.tf, and at a glance I do not see the option to be able to specify an existing loadbalancer. Could you please let me know if there is any workaround where I can have multiple services using the same load balancer.

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Tracked in ticket #110378

[Etiene]

Hi @sewmiuraj, each service created by the ecs-service module creates a target_group for an alb, but not an alb. You can connect those two using a listener such as creating a new aws_lb_listener, or you can try using the listener map from the output of the of our alb module as the input for the variable default_listener_arns like below:

https://github.com/gruntwork-io/terraform-aws-service-catalog/blob/c7b283053fcc46d752ff506f335e67f8311ad211/examples/for-production/infrastructure-live/_envcommon/services/ecs-sample-app-frontend.hcl#L135

https://github.com/gruntwork-io/terraform-aws-service-catalog/blob/c7b283053fcc46d752ff506f335e67f8311ad211/examples/for-production/infrastructure-live/_envcommon/services/ecs-sample-app-backend.hcl#L156C1-L156C88

You'll need to configure the rules in each service so things like the paths are appropriate for each service.

Is this helpful with your problem?