Description

This module creates the DNS and routing rule for a backend service. It's an opinionated module that forms the DNS name from the env (environment name), name (short name for the service - typically with the "-service" suffix removed) and domain.

For the live environment this will be:

    name.domain

For the non-live environments this will be:

    env-name.domain

This is intended for use in a backend router component e.g. one using https://github.com/mergermarket/terraform-acuris-backend-router.

Usage

Add this to the bottom of the infra/main.tf file in your backend router for each service:

module "cognito_service" {
    source  = "mergermarket/backend-service-routing/acuris"
    version = "0.0.2"

    env              = "${var.env}"
    component_name   = "cognito-service"
    dns_domain       = "${var.dns_domain}"
    priority         = "10"
    alb_listener_arn = "${module.backend_router.alb_listener_arn}"
    alb_dns_name     = "${module.backend_router.alb_dns_name}"
    vpc_id           = "${var.platform_config["vpc"]}"
}

Then put the ARN for the target group of your service in each environment into config/qa.json, config/aslive.json, ...:

    {
        "target_groups": {
            "notifications-profile-matching-service": "arn:of:the:qa:notifications-profile-matching-service:target:group"
        }
    }

Architecture

This module is the backend-service-routing box in the diagram below: